이산화탄소(13C;18O2)

Carbon Dioxide

HCID 280CAS 124-38-9

기본 정보

표준 SMILES
O=C=O
InChIKey
CURLTUGMZLYLDI-UHFFFAOYSA-N
분자식
CO2
평균 분자량
44.009 g/mol
단동위원소 질량
43.98982924

개요

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.

이름 및 식별자

우선 이름
Carbon Dioxide
IUPAC
carbon dioxide
현지명
이산화탄소
영어명
Carbon dioxide
분자식
CO2
분자량
44.01

이름 및 동의어

carbon dioxidecarbonic anhydride124-38-9carbonic acid gasCarbonic acid anhydridemethanedioneCarbonicaKohlendioxydCarbon oxide, di-KohlensaureKhladon 744After-damp
이름 더 보기
이산화탄소CO2DRY ICEcarbondioxide(co2)Trockeneisr744KohlendioxidDrikoldKohlenstoffdioxid
AER FixusAnhydride carboniqueDioxido de carbonoDioxyde de carboneCarbon oxide (CO2)R 744Carbon-12 dioxideINS NO.290

데이터베이스 식별자

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

물성

구조 계산 물성

XLogP
0.9
극성 표면적
34.1 Ų
수소 결합 공여자 수
0
수소 결합 수용자 수
2
회전 가능 결합 수
0
무거운 원자 수
3

실험 및 물리화학적 성질

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 · 4건

Other Treatment

Active substance -> EU Pesticides database: Not approved

Agrochemicals -> Pesticide active substances

Active substance -> EU Pesticides database: Approved

LogP · 2건

0.83

0.83

물리화학적 성질

녹는점
78.5 °C · −78.5 °C(lit.)
끓는 점
-78.46 °C · -78.46°C
밀도
1.977 · 1.977(0℃)
증기 밀도
1.52 · 1.52 (vs air)
증기압
56.5 atm · 56.5 atm ( 20 °C)
굴절률
1.0004 · 1.0004
화학적 성질 · 1건

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.

안전 및 규제

GHS 분류

GHS Classification · 6건

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.

유해성 정보

Regulatory Information · 6건

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 · 3건

Non-Flammable Gas

Non-Flammable Gas

Class 9

Fire Hazards · 6건

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 · 6건

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.

안전 및 보호

Fire Fighting · 4건

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 · 3건

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 · 6건

· 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 · 6건

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 · 1건

/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.

독성 정보

Treatment · 1건

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 · 5건

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 · 3건

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 · 1건

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.

규제 정보

FDA Requirements · 2건

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 · 5건

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.

안전 데이터

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
rtecs
FF6400000

화학 및 산업

약리 정보

ATC Code · 2건

V - Various

QV - Various

Bionecessity · 2건

... 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 · 4건

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.

용도 및 제조

Uses · 6건

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 · 3건

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 · 2건

(1972) Negligible

(1975) Negligible

U.S. Imports · 2건

(1972) Negligible

(1975) Negligible

U.S. Production · 6건

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 · 4건

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%)

응용 분야 · 4건

개요Carbon 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.

역사The 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.

용도Carbon 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.

일반 설명An odorless, white solid. Can cause damaging frostbite. Noncombustible and nontoxic. Liquefies at -109°F. Can asphyxiate by displacement of air. Used as a refrigerant.

제조 방법 · 2건

생산 방법Carbon 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.

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

공급사50 곳

Hebei Chuanghai Biotechnology Co., Ltd+86-17732866630 · [email protected]
Career Henan Chemica Co+86-0371-86658258 +86-13203830695 · [email protected]
安徽旺山旺水特种气体有限公司15906197626 · [email protected]
江西核研院新材料有限公司18901398682 18901398682 · [email protected]
上海光铧科技有限公司13801626616 · [email protected]
추가 설명 · 4건

순도시험이 품목의 채취량은 온도 20℃, 압력 760mmHg에서의 용량으로 환산하여야 한다. (1) 유리산 : 이 품목 1,000mL를 새로 끓여서 식힌 물 50mL에 통과시킨다. 이 때 이 품목 1,000mL를 15분간에 통과하도록 속도를 조절하고 도관은 지름 약 1mm의 것을 쓰고 물은 12~14cm의 높이가 되도록 50mL의 메스실린더를 쓰며 도관의 끝이 바닥으로부터 2mm의 높이에 오르도록 한다. 이 품목을 통과시킨 다음에 이 물을 같은 길이의 두개의 비색관중 하나에 넣고 다른 하나의 비색관에는 새로 끓여서 식힌 물 50mL와 0.01N 염산 1mL를 넣고 양비색관에 각각 메틸오렌지시액 0.1mL를 가하여 섞고 양 관의 색을 투시하여 비교할 때, 검체를 넣은 관의 색이 0.01N 염산을 가한 관의 색보다 진해서는 아니 된다. (2) 인화수소, 황화수소 및 환원성유기물 : 이 품목 1,000mL를 질산은암모니아시액 25mL와 암모니아시액 3mL의 혼액에 통하였을 때, 이 품목을 통하지 아니한 같은 액보다 혼탁 또는 어두운 액이 나타나서는 아니 된다. (3) 일산화탄소 : 일산화탄소검지관의 양단을 절단하여 그 일단을 이 품목의 용기와 연결하고 다른 끝을 적당한 유량계에 연결한다. 이 품목 약 300mL를 매분 약 100mL의 속도로 통과시켰을 때, 검지관의 황색부분이 대조 검지관에 공기를 300mL 통과시킨 것보다 진한 녹색이 나타나서는 아니 된다(10ppm 이하).

확인시험이 품목은 불을 꺼지게 하고 수산화칼슘시액에 통하면 백색침전이 생기며 이 침전은 초산(1→4)을 가하면 거품을 내면서 녹는다.

정량법검체채취는 순도시험에 따른다. 적당한 용량의 가스피펫에 수산화나트륨용액(1→3)을 넣어준다. 이어서 이 품목 100mL 이상을 미리 염화나트륨용액(3→10)을 채워둔 100mL 이상의 가스피펫 중에 정확하게 취한 다음 이것을 가스피펫에 옮기고 잘 흔들어 섞어준다. 다음에 흡수되지 않고 남아있는 가스의 용량이 항량이 되었을 때, 그 용량을 측정하여 V(mL)로 하고 다음 계산식에 따라 함량을 구한다.

정의1. 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.

관련 반응

4,707건

연결된 노트

불러오는 중…