(13C)炭素ジ(18O)オキシド

Carbon Dioxide

HCID 280CAS 124-38-9

基本情報

標準SMILES
O=C=O
InChIKey
CURLTUGMZLYLDI-UHFFFAOYSA-N
分子式
CO2
平均分子量
44.009 g/mol
単同位体質量
43.98982924

概要

Carbon dioxide appears as a colorless odorless gas at atmospheric temperatures and pressures. Relatively nontoxic and noncombustible. Heavier than air and may asphyxiate by the displacement of air. Soluble in water. Forms carbonic acid, a mild acid. Under prolonged exposure to heat or fire the container may rupture violently and rocket. Used to freeze food, to control chemical reactions, and as a fire extinguishing agent.

名称と識別子

優先名称
Carbon Dioxide
IUPAC
carbon dioxide
現地名
炭素ジオン
英語名
Carbon dioxide
分子式
CO2
分子量
44.01

名称と別名

carbon dioxidecarbonic anhydride124-38-9carbonic acid gasCarbonic acid anhydridemethanedioneCarbonicaKohlendioxydCarbon oxide, di-KohlensaureKhladon 744After-damp
名称をさらに表示
炭酸ガス炭素ジオキシド二酸化炭素メタンジオンドライアイス液化炭酸ガス炭素ジオン炭酸無水物ジオキソ炭素遊離炭酸二酸化炭素 (JP17)1-[3-ブトキシ-2-(ヒドロキシイミノ)-3-オキソプロピル]キノリン-1-イウム1-[2-(ヒドロキシイミノ)-3-オキソ-3-ブトキシプロピル]キノリニウム固体炭酸CO2DRY ICEcarbondioxide(co2)Trockeneisr744KohlendioxidDrikoldKohlenstoffdioxid
AER FixusAnhydride carboniqueDioxido de carbonoDioxyde de carboneCarbon oxide (CO2)R 744Carbon-12 dioxideINS NO.290

データベース識別子

CAS
124-38-9、14485-07-5、2684-00-6
PubChem CID
280
DTXSID
DTXSID4027028
ChEMBL
CHEMBL1231871
ChEBI
CHEBI:16526
UNII
142M471B3J
EC Number
204-696-9、686-102-1
Nikkaji
J43.600C

物性

構造計算による物性

XLogP
0.9
極性表面積
34.1 Ų
水素結合供与体数
0
水素結合受容体数
2
回転可能結合数
0
重原子数
3

実験および物理化学的性質

Chemical ClassesToxic Gases & Vapors -> Simple Asphyxiants
CosmeticsPropellant
pHThe pH of saturated CO2 solutions varies from 3.7 at 101 kPa (1 atm) to 3.2 at 2370 kPa (23.4 atm)
SpringerMaterials PropertiesSchoenflies notation
Pesticides · 4 件

Other Treatment

Active substance -> EU Pesticides database: Not approved

Agrochemicals -> Pesticide active substances

Active substance -> EU Pesticides database: Approved

LogP · 2 件

0.83

0.83

物理化学的性質

融点
78.5 °C · −78.5 °C(lit.)
沸点
-78.46 °C · -78.46°C
比重(密度)
1.977 · 1.977(0℃)
蒸気密度
1.52 · 1.52 (vs air)
蒸気圧
56.5 atm · 56.5 atm ( 20 °C)
屈折率
1.0004 · 1.0004
化学的性質 · 2 件

化学的特性Carbon dioxide,CO2, also known as carbonic anhydride and carbonic acid gas, is a colorless,odorless gas that liquifies at -65 °C(-86 OF) and solidifies in dry ice at -78.2 °C(-107 OF). It is soluble in water,alcohol, and most alkaline solutions. In a relatively slow reaction,carbon dioxide hydrates in water to become carbonic acid and is corrosive. In petroleum production, the velocity of the carbon dioxide gas can increase the corrosion rate to very high levels,with the presence of salts becoming unimportant. Carbon dioxide is used in preparing carbonated beverages, fire extinguishers, dry ice refrigerants,and as a raw material in the production of sodium carbonate and sodium bicarbonate using the Solvay procedure.

化学性质色?臭の気体で,水にいくらか溶け,弱酸性を示す。

安全と法規制

GHS分類

GHS Classification · 6 件

This chemical does not meet GHS hazard criteria for 4.9% (77 of 1570) of reports.

Warning

H280 (82%): Contains gas under pressure; may explode if heated [Warning Gases under pressure]

P282, P336+P317, P403, and P410+P403 (click each P-code to see the statement)

Aggregated GHS information provided per 1570 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

This chemical does not meet GHS hazard criteria for 97.4% (38 of 39) of all reports.

危険有害性情報

Regulatory Information · 6 件

Chemical: Carbon dioxide

Commission Regulation No 844/2012

Carbon dioxide is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Carbon dioxide are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Reg. (EU) 2021/80

2008/127, Reg. (EU) 2017/195, Reg. (EU) 2020/1160, Reg. (EU) 2021/745, Reg. (EU) 2022/437, Reg. (EU) No 532/2013, Reg. (EU) No 540/2011

Carbon dioxide: Non hazardous

Other Safety InformationIMAP assessments - Carbon dioxide: Human health tier I assessment
DOT Label · 3 件

Non-Flammable Gas

Non-Flammable Gas

Class 9

Fire Hazards · 6 件

Behavior in Fire: Containers may explode when heated. (USCG, 1999)

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

· Non-flammable gases.

· Non-flammable gases.

· Non-flammable gases.

Fire PotentialNoncombustible gas.
Health Hazards · 6 件

Inhalation causes increased respiration rate, headache, subtle physiological changes for up to 5% concentration and prolonged exposure. Higher concentrations can cause unconsciousness and death. Solid can cause cold contact burns. Liquid or cold gas can cause freezing injury to skin or eyes similar to a burn. (USCG, 1999)

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.

· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.

· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.

安全と保護具

Fire Fighting · 4 件

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

Excerpt from ERG Guide 120 [Gases - Inert (Including Refrigerated Liquids)]:

In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

First Aid Measures · 3 件

Fresh air, rest. Administration of oxygen may be needed. Artificial respiration may be needed. Refer for medical attention.

ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .

ON FROSTBITE: rinse with plenty of water. Refer for medical attention.

Accidental Release Measures · 6 件

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Do not touch or walk through spilled material.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Do not touch or walk through spilled material.

· CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.

· Do not touch or walk through spilled material.

First Aid · 6 件

Excerpt from NIOSH Pocket Guide for Carbon dioxide:

Excerpt from NIOSH Pocket Guide for Carbon dioxide:

Excerpt from NIOSH Pocket Guide for Carbon dioxide:

General First Aid:

General First Aid:

General First Aid:

Safe StorageFireproof if in building. Cool. Ventilation along the floor.
Firefighting Hazards · 1 件

/Carbon dioxide/ is not effective for use on fires involving chemicals that have their own oxygen supply (i.e., cellulose nitrate); or on fires involving reactive metals (such as, potassium, sodium, magnesium, aluminum, titanium and zirconium) or their hydrides as these materials decompose carbon dioxide.

毒性情報

Treatment · 1 件

In case of inhalation, administer 100% humidified supplemental oxygen with assisted ventilation as required. Administer a benzodiazepine IV if seizures occur. Irrigate exposed eyes with copious amounts of room temperature water for at least 15 minutes if exposure occurred through eye exposure. In case of dermal exposure, rewarming and a variety of topical treatments are indicated for frostbite injury. (T36)

Interactions · 5 件

Reactive oxygen species (ROS) are harmful because they can oxidize biological macromolecules. We show here that atmospheric CO(2) (concentration range studied: 40-1,000 ppm.) increases death rates due to H(2)O(2) stress in Escherichia coli in a dose-specific manner. This effect is correlated with an increase in H(2)O(2)-induced mutagenesis and, as shown by 8-oxo-guanine determinations in cells, DNA base oxidation rates. Moreover, the survival of mutants that are sensitive to aerobic conditions (Hpx(-) dps and recA fur), presumably because of their inability to tolerate ROS, seems to depend on CO(2) concentration. Thus, CO(2) exacerbates ROS toxicity by increasing oxidative cellular lesions.

The responsiveness of respiratory center to stimulation by CO2 ... is depressed by anoxia and various drugs such as ether, alcohol, chloroform, morphine, barbital, etc.

The role of CO2 in hyperbaric oxygen toxicity was investigated by administering acetazolamide ..., tris buffer (tris-hydroxymethyl) aminomethane, and NaHCO3 by ip injection, and by exposure of other groups of animals to an atmosphere of 5% CO2 and 95% O2. All animals were placed in a pressure chamber and maintained at 50 psig in 100% O2 until death. The tris buffer and NaHCO3 buffer significantly extended /the/ time to onset of convulsions and to time of death. Acetazolamide and also 5% CO2 shortened /the/ time of convulsions and significantly shortened survival time. Apparently, increased tissue levels of CO2 play an important role in hyperbaric O2 toxicity. The cause of death in the animals exposed to hyperbaric O2 was pulmonary edema secondary to a systemic hypertension.

Toxicological interactions between carbon monoxide and carbon dioxide were evaluated in rats. Groups of six male Fischer rats were exposed for 30 minutes to carbon monoxide and CO2, either individually or in combination, or to the products of combustible materials. Exposure to carbon monoxide in air caused death within the first minute at concentrations of 4600 to 5000 ppm, which gave carboxyhemoglobin levels greater than 83%. With 2500 ppm carbon monoxide, blood pH decreased from 7.42 to 7.2. The CO2 concentrations tested (1.3 to 14.7%) were neither incapacitating nor lethal. When CO2 was added to sublethal concentrations of carbon monoxide, some of the rats died during either the 30 minute exposure period or in the following 24 hours. The rate of formation of carboxyhemoglobin from an exposure to 2500 ppm carbon monoxide was 1.5 times greater in the presence of 5.25% CO2. However, this could not explain the increased death rate, since the carboxyhemoglobin equilibrium level (78%) did not change. The combination of 2500 ppm carbon monoxide and 5.25% CO2 reduced the blood pH to 6.8. With the combined gases, the total CO2 and bicarbonate values remained low for at least 30 minutes after exposure indicating that a combination of respiratory and metabolic acidosis occurred in animals exposed to both gases. Carbon monoxide, CO2 and carboxyhemoglobin levels produced as a result of thermal combustion of 11 natural and synthetic materials at their median lethal concentrations were measured. Only polyphenylsulfone produced sufficient carbon monoxide and carboxyhemoglobin levels to suggest carbon monoxide as the primary toxicant. For the other materials the carbon monoxide concentration was too low to account for the deaths observed. It was concluded that in the range of 2500 to 4100 ppm, carbon monoxide alone has very little probability of causing death, but if it is combined with levels of CO2 above 1.5 % the probability of death is much higher.

For more Interactions (Complete) data for Carbon dioxide (6 total), please visit the HSDB record page.

Target Organsrespiratory system, cardiovascular system
Health EffectsCarbon dioxide poisoning (Hypercapnia) can induce increased cardiac output, an elevation in arterial blood pressure, and a propensity toward arrhythmias (L1145).
Ecotoxicity Values · 3 件

LC50; Species: /Oncorhynchus mykiss/ (Rainbow trout); Concentration: 240 mg/L for 1 hour /Conditions of bioassay not specified in source/

LC50; Species: /Oncorhynchus mykiss/ (Rainbow trout); Concentration: 35 mg/L for 96 hr /Conditions of bioassay not specified in source/

LC50; Species: /Oncorhynchus mykiss/ (Rainbow trout); Concentration: 60-240 mg/L for 12 hr /Conditions of bioassay not specified in source/

Environmental Fate · 1 件

The extensive sets of global CO2 measurements of the National Oceanic and Atmospheric Admin (NOAA) Geophysical Monitoring for Climatic Change (GMCC) division and of the Upper Atmosphere and Space Research Laboratory of Tohoku University are combined with a two-dimensional transport model to derive, in an "inverse" calculation, the latitudinal and seasonal distributions of sources and sinks of CO2 necessary to reproduce the observed concn. ... It is found that the southern oceans are a sink of carbon of 0.8 to 1.5 Gt/yr (1 Gt = 1 x 10 +15 g) and that the equatorial areas are a source to the atmosphere of 1.4 to 2.8 Gt. There seems to be significant seasonality in the sources and sinks of CO2, both in the tropics and in the southern oceans. Seasonal net ecosystem production north of 25 deg N is found to be 6.2 to 8.2 Gt of carbon. ... The global average net source of atmospheric CO2 estimated from the Tohoku data is 2.84 Gt C/yr, while for the GMCC data it is 2.98 Gt C/yr.

法規制情報

FDA Requirements · 2 件

Substance added directly to human food affirmed as generally recognized as safe (GRAS).

Carbon dioxide used as a general purpose food additive in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.

FIFRA Requirements · 5 件

Residues of carbon dioxide are exempted from the requirement of a tolerance when used in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to growing crops or to raw agricultural commodities after harvest. Use: propellant. Limit: none.

Residues of carbon dioxide are exempted from the requirement of a tolerance when used in accordance with good agricultural practice as inert (or occasionally active) ingredients in pesticide formulations applied to animals. Use: propellant. Limit: none.

The insecticide carbon dioxide is exempted from the requirement of a tolerance when used after harvest in modified atmospheres for stored insect control on food commodities.

The EPA has previously identified and required submission of generic (i.e., active ingredient specific) data required to support reregistration of products containing carbon and carbon dioxide as an active ingredients. EPA has also consulted and relied upon published literature as a source for technical information. EPA has completed its review of these generic data, and has determined that the data are sufficient to support reregistration of products containing carbon and carbon dioxide. ... EPA has determined that all products containing carbon or carbon dioxide as the active ingredient are eligible for reregistration.

As the federal pesticide law FIFRA directs, EPA is conducting a comprehensive review of older pesticides to consider their health and environmental effects and make decisions about their continued use. Under this pesticide reregistration program, EPA examines newer health and safety data for pesticide active ingredients initially registered before November 1, 1984, and determines whether the use of the pesticide does not pose unreasonable risk in accordance to newer safety standards, such as those described in the Food Quality Protection Act of 1996. Pesticides for which EPA had not issued Registration Standards prior to the effective date of FIFRA '88 were divided into three lists based upon their potential for human exposure and other factors, with List B containing pesticides of greater concern than those on List C, and with List C containing pesticides of greater concern than those on List D. Carbon dioxide is found on List D. Case No: 4019; Pesticide type: insecticide, rodenticide; Case Status: RED Approved 09/19; OPP has made a decision that some/all uses of the pesticide are eligible for reregistration, as reflected in a Reregistration Eligibility Decision (RED) document.; Active ingredient (AI): carbon dioxide; AI Status: OPP has completed a Reregistration Eligibility Decision (RED) document for the case/AI.

安全データ

F
4.5-31
OEB
A
OEL
TWA: 5000 ppm (9000 mg/m3), STEL: 30,000 ppm (54,000 mg/m3)
wgk
-
IDLA
40,000 ppm
tsca
TSCA listed

化学と産業

薬理情報

ATC Code · 2 件

V - Various

QV - Various

Bionecessity · 2 件

... Essential to photosynthesis and plant growth. CO2 absorbed by leaves and water absorbed by roots are converted to simple sugars by sun's energy in plant chlorophyll.

... Necessary for respiration cycle of ... animals.

Protein BindingNo protein binding data.
PharmacodynamicsData not found.
Mechanism of Action · 4 件

Data not found.

Supercritical carbon dioxide possesses germicide (bactericide and sporicide) effect. Despite of the fact, that this effect is used in industrial sterilization processes, the sterilization mechanism at molecular level is unclear. Our hypotheses can provide a molecular-biological explanation for the phenomenon. We believe that in supercritical state CO(2) reacts competitively with Met-tRNA(fMet), the formation rate and the amount of formyl-methionyl-tRNA (fMet-tRNA(fMet)) will be diminished by irreversible substrate consumption. The fMet-tRNA(fMet) possesses a key role in prokaryotic protein synthesis, being almost exclusively the initiator aminoacyl-tRNA. The formed carbamoyl-methionyl-tRNA (cMet-tRNA(fMet)), probably stable only under pressure and high CO(2) concentration, is stabilized by forming a ternary molecular complex with the GTP-form of the translational initiation factor 2 (GTP-IF2). This complex is unable to dissociate from preinitiation 70S ribosomal complex because of strong polar binding between the protein C-2 domain and the modified initiator aminoacyl-tRNA. The IF2-fMet-tRNA(fMet)-blocked 70S ribosomal preinitiation complex does not decompose following the GTP hydrolysis, becoming unable to synthesize proteins. The death of the microbial cell is caused by inhibition of the protein synthesis and energetic depletion. Moreover, we propose a possible mechanism for the accumulation of cMet-tRNA(fMet) in the bacterial cell. Since the translational process is an important target for antibiotics, the proposed mechanism could be a work hypothesis for discovery of new antibiotics. Made by high conservative character of prokaryotic translation initiation, the proposed IF2 pathway deterioration strategy may conduct to obtaining selective (with low mammalian toxicity) antimicrobials and at the same time, with reduced possibility of the drug resistance development.

... Well fed C. elegans (roundworm) avoid CO2 levels above 0.5%. Animals can respond to both absolute CO2 concentrations and changes in CO2 levels within seconds. Responses to CO2 do not reflect avoidance of acid pH but appear to define a new sensory response. Sensation of CO2 is promoted by the cGMP-gated ion channel subunits TAX-2 and TAX-4, but other pathways are also important. Robust CO2 avoidance in well fed animals requires inhibition of the DAF-16 forkhead transcription factor by the insulin-like receptor DAF-2. Starvation, which activates DAF-16, strongly suppresses CO2 avoidance. Exposure to hypoxia (<1% O2) also suppresses CO2 avoidance via activation of the hypoxia-inducible transcription factor HIF-1. The npr-1 215V allele of the naturally polymorphic neuropeptide receptor npr-1, besides inhibiting avoidance of high ambient O2 in feeding C. elegans, also promotes avoidance of high CO2. C. elegans integrates competing O2 and CO2 sensory inputs so that one response dominates. Food and allelic variation at NPR-1 regulate which response prevails. These results suggest that multiple sensory inputs are coordinated by C. elegans to generate different coherent foraging strategies.

... Adult Caenorhabditis elegans (roundworm) display an acute avoidance response upon exposure to CO2 that is characterized by the cessation of forward movement and the rapid initiation of backward movement. This response is mediated by a cGMP signaling pathway that includes the cGMP-gated heteromeric channel TAX-2/TAX-4. CO2 avoidance is modulated by multiple signaling molecules, including the neuropeptide Y receptor NPR-1 and the calcineurin subunits TAX-6 and CNB-1. Nutritional status also modulates CO2 responsiveness via the insulin and TGFbeta signaling pathways. CO2 response is mediated by a neural circuit that includes the BAG neurons, a pair of sensory neurons of previously unknown function. TAX-2/TAX-4 function in the BAG neurons to mediate acute CO2 avoidance. ... C. elegans senses and responds to CO2 using multiple signaling pathways and a neural network that includes the BAG neurons and this response is modulated by the physiological state of the worm.

Biological Half-LifeData not found.

用途と製造

Uses · 6 件

Used in carbonated beverages, fire extinguishers, dry ice, and propellants; A product of fermentation; [ACGIH] A product of animal metabolism and released when organic materials burn; a constituent of the earth's atmosphere at about 0.03% by volume; [Merck Index # 1809] Used in the deliming stage of leather production; [PMID 21938525]

Aluminum Producing [Category: Industry]

Smoking cigarettes [Category: Food & Drugs]

For carbon dioxide (USEPA/OPP Pesticide Code: 016601) ACTIVE products with label matches. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./

Carbon dioxide is used as a pesticide for insect control in stored grain under modified atmospheres containing approx 60% carbon dioxide.

Rodenticide (mice and rats)

Impurities · 3 件

May contain traces of hydrogen sulfide and sulfur dioxide.

The main impurities present in ... carbon dioxide /from natural sources / are methane and hydrogen sulfide.

The necessary degree of purity is dependent on the final use to which the carbon dioxide is put. Because a large proportion is used in the food and drink industries, the major criteria for the quality of the carbon dioxide are that it should be free of odor and taste. Thus, all contaminants that could contribute to these two properties (e.g., sulfur compounds, oils, and hydrocarbons) should be removed, preferably to less than mg/kg levels. The main impurities present to any significant degree in the final purified product are usually nitrogen, oxygen, and argon (from air), and hydrogen and carbon monoxide (if the carbon dioxide came from a process-gas source).

U.S. Exports · 2 件

(1972) Negligible

(1975) Negligible

U.S. Imports · 2 件

(1972) Negligible

(1975) Negligible

U.S. Production · 6 件

2023: 100,000,000,000 - <110,000,000,000 lb

(1972) 1.46X10+12 grams

(1975) 1.68X10+12 grams

(1985) 3.92X10+12 g /liquid and solid only/

(1990) 10.37 billion lb

For more U.S. Production (Complete) data for Carbon dioxide (11 total), please visit the HSDB record page.

Consumption Patterns · 4 件

44% is used captively (42% as a chem raw material for urea prodn; and 2% in the prodn of methanol and sodium carbonate, for inerting, pressurizing in coal mining and oil recovery); 56% is used as merchant carbon dioxide (11% in refrigeration; 5% in carbonation; 3% as chem raw material; 3% in inerting; 1% for pressurizing in soft drink mfr, breweries, wineries, and as an aerosol propellant in some food products; 30% in oil well stimulation; and 3% in other applications). (1973)

Refrigeration, 35%; Beverage carbonization, 25%; Inerting and pressurizing, 10%; Enhanced oil recovery, 10%; Miscellaneous, 20% (1983)

A large portion (ca. 50%) of all the carbon dioxide recovered is used at the point of production to make further chemicals of commercial importance, mainly urea and methanol

About 51% of the carbon dioxide used in the US is used in the food industry...it is generally used for food freezing or chilling; approximately 18% is used for beverage carbonation...both soft drinks and beer production consume the largest quantity for carbonation; about 10% is used for chemical manufacturing; other applications include metal working (4%) and oil and gas recovery (6%)

応用分野 · 8 件

解説二酸化炭素,CO2(44.01).炭酸ガスともいう.多くの惑星の大気中に存在する.地球上では空気中に体積で約0.03% 含まれているほか,鉱泉水,天然ガスなどにも含まれ,炭素を含む物質の燃焼,火山の噴火などによって絶えず生成されている.実験室では,石灰石に塩酸を作用させて発生させる.工業的には石灰石を加熱分解してつくる.石炭などを燃やしたときや,エタノール発酵などの発酵のときに発生する二酸化炭素も利用されている.O-C-Oの直線形分子でC-O0.162 nm.無色,無臭,不燃性の気体で支燃性もない.空気中で10% 以上の濃度になると人間は呼吸困難になって意識を失う.空気を1としたとき,d1.529.密度1.976 g L-1(0 ℃,1 atm).固体二酸化炭素は常圧では昇華する.昇華点-78.5 ℃(1 atm),融点-56.5 ℃(5.2 atm).臨界温度31.0 ℃.臨界圧72.80 atm.1 atm で100 mL の水に対する溶解度は171 mL(0 ℃),119 mL(10 ℃),88 mL(20 ℃).水溶液中では炭酸を生じ,わずかに酸性を示す.H2CO3 H+ + HCO3-pKa 6.35.エタノール,脂肪族カルボン酸中へは水よりもよく溶ける.エーテル,ベンゼンとは混和するが,ほかの多くの有機溶媒とは混和しない.2000 ℃ までは安定であるが,さらに高温では一酸化炭素と酸素に解離する.水素とは可逆的に反応して,一酸化炭素と水とを生じる.アルカリ金属,アルカリ土類金属と加熱すると,炭素やギ酸塩に還元される.多くの金属の酸化物,水酸化物と反応して炭酸塩を生じる.とくに水酸化カルシウム水溶液では,はじめ炭酸塩を沈殿するが,長く通じると炭酸水素塩を生じて溶解する.しょう乳洞,しょう乳石,石じゅんの生成はこの反応による.清涼飲料の製造,可燃性物質の製造・取り扱い時の不活性化用,エーロゾルなどに用いられる.化学工業では炭酸塩の製造に用いられる.固体二酸化炭素はドライアイスとよばれ,冷凍食品工業,その他で寒剤として利用されている.

用途ペニシリン製造、アイスクリーム?バター?チーズなどの保存?低温輸送、冷却、溶接、鋳物用、清涼飲料、消火剤、農薬(殺虫剤)

用途もっとも重要な用途は、炭酸ナトリウム、炭酸水素ナトリウム(重曹)、鉛白(塩基性炭酸鉛)の製造ならびにソーダ水などの清涼飲料水用である。液体炭酸は消火剤に用いられる。固体炭酸は優れた冷凍剤で、食料品、果物などの貯蔵、輸送に適している。

説明Carbon dioxide is a colorless, odorless, noncombustible gas present throughout the atmosphere and is an essential compound for life on Earth. It is found on other planets in the solar system. Mars’s icecaps are primarily frozen carbon dioxide and Venus’s atmosphere is mostly carbon dioxide. Carbon dioxide occurs naturally as approximately 0.03% v/v of the atmosphere.Solid carbon dioxide, also known as dry ice, is usually encountered as white-colored pellets or blocks.

来歴The discovery of carbon dioxide, credited to Joseph Black (1728–1799), played a critical role in supplanting the phlogiston theory and advancing the development of modern chemistry. Black, in his medical studies, was searching for a substance to dissolve kidney stones, but he switched his subject to a study of stomach acidity. Black was working with the carbonates magnesia alba (magnesium carbonate) and calcium carbonate (limestone) and observed that when magnesia alba was heated or reacted with acids, it produced a gas and a salt. Black, who published his work in 1756, called the gas “fixed air” and noted that it had properties similar to those described by Jan Baptista van Helmont (1577–1644) for spiritus sylvestrius. Spiritus sylvestrius was the gas produced during combustion processes, and van Helmont realized that this was the same gas produced during fermentation and when acids reacted with seashells.

使用Carbon Dioxide is a gas obtained during fermentation of glucose (grain sugar) to ethyl alcohol. it is used in pressure-packed foods as a propellant or aerating agent and is also used in the carbonation of beverages. it is released as a result of the acid carbonate reaction of leavening agents in baked goods to produce an increase in volume. as a solid, it is termed dry ice and is used for freezing and chilling.

一般的な説明An odorless, white solid. Can cause damaging frostbite. Noncombustible and nontoxic. Liquefies at -109°F. Can asphyxiate by displacement of air. Used as a refrigerant.

使用用途二酸化炭素は、の製造など、化学工業で広く利用される他に、炭酸飲料などの清涼飲料水や医薬品などとしても使用されています。固体はドライアイスと呼ばれ、冷却剤として、魚類、乳製品、冷凍食品などの保存、低温輸送用などに利用されています。 液化炭酸ガスは、冷却用の他に清涼飲料水の原料、消火剤、炭酸塩の工業製品の原料、殺虫剤、酸化防止剤、植物の成長促進用など、他用途に使用されています。 断熱材などに使用されるなどに含まれている泡の組成は、ウレタンフォームの原料を混合して反応が起きる際に副生する二酸化炭素を利用したものです。二酸化炭素の大量放出が地球温暖化の原因の1つとされているため、二酸化炭素の排出量削減が求められています。

調製方法 · 5 件

Carbon dioxide is obtained industrially in large quantities as a byproduct in the manufacture of lime; by the incineration of coke or other carbonaceous material; and by the fermentation of glucose by yeast. In the laboratory it may be prepared by dropping acid on a carbonate.

製造方法Carbon dioxide is produced as a by-product in many processes. It is pro duced as a by-product in the manufacture of lime from calcium carbonate: CaCO3 →CaO + CO2 CO2 also is derived from synthesis gas which is a mixture of CO, CO2, H2 and N2 from air obtained by steam reforming. Carbon dioxide also is obtained by combustion of natural gas: CH4 + 2O2 → CO2 + 2H2O It also is obtained as a by-product in the Haber-Bosch process for the man ufacture of ammonia. The method involves passing steam and air over hot coke. Carbon dioxide also is produced along with ethanol from fermentation of carbohydrates by yeast: C6H12O6→2CO2 + 2C2H5OH In the laboratory, CO2 may be produced by the reaction of any carbonate with a dilute mineral acid: CaCO3 + 2HCl → CaCl2 + CO2 + H2O

製造方法原料である粗二酸化炭素ガスとして、工業的には発酵ガス、天然ガス、石油精製の副生ガス、アンモニア合成の際の副生ガスなどが主に用いられます。これらは二酸化炭素濃度が高いですが、水素、メタン、酸素、窒素、無機・有機硫黄の不純物、水蒸気などの不純物が含まれています。 これを物理的洗浄法 (水洗洗浄) 、活性炭、シリカ、アルミナによる吸着、化学的洗浄法 (過マンガン酸カリ溶液洗浄法) 、炭酸ナトリウム溶液洗浄法などを組合わせて精製します。液化炭酸ガスは、上記のようにして得られた二酸化炭素のガスを1.01MPaに圧縮して冷却することで得られます。 また、ドライアイスは8.08MPaに圧縮して得られた液化炭酸ガスを細孔から噴出させることで、断熱膨張により雪片状に凝結させながら、型に詰めて圧縮成形して得られます。

合成方法炭素または炭化水素の燃焼,炭酸カルシウムの熱分解あるいは酸分解により得られる。

純化方法Pass the gas over CuO wire at 800o to oxidise CO and other reducing impurities (such as H2), then over copper dispersed on Kieselguhr at 180o to remove oxygen. Drying it at -78o removes the water vapour. Final purification is by vacuum distillation at liquid nitrogen temperature to remove non-condensable gases [Anderson et al. J Chem Soc 3498 1962]. Sulfur dioxide contaminant can be removed at 450o using silver wool combined with a plug of platinised quartz wool. Halogens are removed by using Mg, Zn or Cu, heated to 450o. [Glemsner in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 647 1963.]

上流・下流製品情報

下流製品

1-Methyl-4-piperidinol hydrochloride4-tert-ブチルシクロヘキサンカルボン酸 (cis-, trans-混合物)3,6-ジクロロ-2-ヒドロキシ安息香酸3-ニトロフェニル酢酸3,3,3-トリフルオロプロピオン酸4-ピリジル酢酸エチル6-CHLORO-2-(TRIFLUOROMETHYL)QUINOLINE-4-CARBOXYLIC ACID4-ニトロソジフェニルアミン炭酸ジルコニウム(IV)水和物, 塩基性チオフェン-2-スルホニルクロリド1-クロロフタラジン2-(トリフルオロメチル)安息香酸

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補足説明

定義本品は、次の化学式で表される気体である。

定義1. The solution of carbon dioxide in a liquid under pressure, as in carbonated soft drinks. 2. The addition of carbon dioxide to compounds, e.g. the insertion of carbon dioxide into Grignard reagents.

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