基本情報
- 標準SMILES
c1ccc2c(c1)CCCC2- InChIKey
CXWXQJXEFPUFDZ-UHFFFAOYSA-N- 分子式
- C10H12
- 平均分子量
- 132.2 g/mol
- 単同位体質量
- 132.09390038
概要
Tetrahydronaphthalene appears as a light colored liquid. May be irritating to skin, eyes and mucous membranes.
名称と識別子
- 優先名称
- Tetralin
- IUPAC
- 1,2,3,4-tetrahydronaphthalene
- 現地名
- テトラリン
- 英語名
- 1,2,3,4-Tetrahydronaphthalene
- 分子式
- C10H12
- 分子量
- 132.2
名称と別名
名称をさらに表示
データベース識別子
- CAS
119-64-2、68412-24-8- PubChem CID
- 8404
- DTXSID
DTXSID1026118- ChEMBL
CHEMBL1575635- ChEBI
CHEBI:35008- UNII
- FT6XMI58YQ
- EC Number
- 204-340-2
- Nikkaji
- J2.002H
物性
構造計算による物性
- XLogP
- 3.5
- 極性表面積
- 0 Ų
- 水素結合供与体数
- 0
- 水素結合受容体数
- 0
- 回転可能結合数
- 0
- 重原子数
- 10
- 形式電荷
- 0
- 複雑度
- 92.6
実験および物理化学的性質
Chemical Classes
Other Classes -> Naphthalenes
Volatile Organic Compound (VOC)
LogP
3.78
3.49
Odor
ODOR RESEMBLING MIXTURE OF BENZENE & MENTHOL
MOLDY, TURPENTINE ODOR
Pungent odor
Density
0.974 at 68 °F (liquid (USCG, 1999) - Less dense than water; will float
0.9702 G/ML @ 20 °C/4 °C
MOISTURE CONTENT NONE; RESIDUE ON EVAPORATION NONE; BULK DENSITY 8 LB/GAL
Relative density (water = 1): 0.9702
0.981 @25 °C
Solubility
MISCIBLE WITH ETHANOL, BUTANOL, ACETONE, BENZENE, PETROLEUM ETHER, CHLOROFORM, &PETROLEUM ETHER, DECALIN; SOL IN METHANOL: 50.6% WT/WT; INSOL IN WATER.
SOL IN ANILINE
SOL IN ETHER
Solubility in water: very poor
Flash Point
176 °F (USCG, 1999)
82 °C
171 °F (77 °C) (OPEN CUP); 180 °F (82 °C) (CLOSED CUP)
160 °F (71 °C) (CLOSED CUP)
176 °C (Closed cup); 190 °F (Open cup)
77 °C o.c.
Boiling Point
406 °F at 760 mmHg (USCG, 1999)
207.6 °C @ 760 MM HG
207.6 °C
207.2 °C @760 [mm Hg]
物理化学的性質
- 融点
- -35 °C · -35 °C (lit.)
- 沸点
- 207 °C · 207 °C (lit.)
- 比重(密度)
- 0.973 g/mL · 0.973 g/mL at 25 °C (lit.)
- 蒸気密度
- 4.55 · 4.55 (vs air)
- 蒸気圧
- 0.18 mm · 0.18 mm Hg ( 20 °C)
- 屈折率
- 20 · n20/D 1.541(lit.)
- 闪点
- 171 °F · 171 °F
- 貯蔵温度
- 30 °C · Store below +30°C.
- 溶解性
- 0.045 g/リットル · 0.045g/リットル
- 外見
- 体液
- 色
- Colorless
- 臭い (Odor)
- 刺激的なメントール臭
- 臭気閾値(Odor Threshold)
- 0.0093 ppm · 0.0093ppm
- 爆発限界(explosive limit)
- 0.8 %, · 0.8%, 100°F
- 水溶解度
- 不溶性
- 比熱容量
- 1.65 J/ · Cp(liquid): 1.65 J/(g·K), at 25℃
- Merck
- 14 · 14,9221
- BRN
- 1446407 · 1446407
- Henry's Law Constant
- 6.4 · 6.4×10-3 mol/(m3Pa) at 25℃, Plyasunov and Shock (2000)
- Dielectric constant
- 2.77 · 2.77
- 安定性
- 安定。可燃性。強力な酸化剤とは相容れない。
- InChI
- 1S/C10H12/c1-2-6-10-8-4-3-7-9(10)5-1/h1-2,5-6H,3-4,7-8H2
- InChIKey
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N
- SMILES
- C1CCc2ccccc2C1
- LogP
- 3.78 at · 3.78 at 23℃
- CAS データベース
- 119 · 119-64-2(CAS DataBase Reference)
- NISTの化学物質情報
- Tetralin(119-64-2)
- EPAの化学物質情報
- 1 · 1,2,3,4-Tetrahydronaphthalene (119-64-2)
化学的性質
化学的特性Tetralin or 1,2,3,4-tetrahydronaphthalene is a flammable liquid.
安全と法規制
GHS分類
GHS Classification
Warning
H315: Causes skin irritation [Warning Skin corrosion/irritation]
P264, P264+P265, P273, P280, P302+P352, P305+P351+P338, P321, P332+P317, P337+P317, P362+P364, P391, and P501 (click each P-code to see the statement)
This chemical does not meet GHS hazard criteria for 1.5% (11 of 729) of reports.
Danger
H304 (20.3%): May be fatal if swallowed and enters airways [Danger Aspiration hazard]
危険有害性情報
Regulatory Information
Chemical: Naphthalene, 1,2,3,4-tetrahydro-
Naphthalene, 1,2,3,4-tetrahydro- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Naphthalene, 1,2,3,4-tetrahydro- 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)
Status: Active Update: 11-04-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/21076
1,2,3,4-Tetrahydronaphthalene: Does not have an individual approval but may be used under an appropriate group standard
Fire Hazards
Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:
Combustible. Gives off irritating or toxic fumes (or gases) in a fire. Above 77 °C explosive vapour/air mixtures may be formed.
Hazards Summary
Listed in table of Methemoglobinemia-inducing agents: industrial, environmental, and pharmaceutical; [Sullivan, p. 729]; Tetralin is a skin and mucous membrane irritant. When used in poorly ventilated areas, tetralin may cause central nervous system depression. Ingestion of tetralin has caused green urine and laboratory evidence of liver and kidney injury. [HSDB] A skin, eye, and respiratory tract irritant; Inhalation of high concentrations may cause CNS effects; May cause kidney injury; [ICSC]
Special Reports
BEAUMONT D, WAIGH RD; THE BETA-ADRENOMIMETIC ACTIVITY OF TETRAHYDROISOQUINOLINESAND TETRAHYDRONAPHTHALENES. PROG MED CHEM 18: 45-86 (1981). A REVIEW WITH 155 REFERENCES ON THE BETA-ADRENOMIMETIC ACTIVITY OF 1,2,3,4-TETRAHYDROISOQUINOLINE AND 1,2,3,4-TETRAHYDRONAPHTHALENE DERIVATIVES.
Nelson NA et al; Solvent Nephrotoxicity in Humans and Experimental Animals. Am J Nephrol 10 (1): 10-20 (1990). Evidence from human case reports, epidemiologic studies and animal experiments have suggested that exposure to organic solvents is associated with a wide spectrum of renal disorders, including tubular necrosis, interstitial disease, glomerulonephritis and neoplasia. This review summarizes what is known about solvent induced renal damage in humans and experimental animals, with emphasis on hypothesized mechanisms by which this broad range of disorders may occur.
Reactivity Profile
TETRAHYDRONAPHTHALENE may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. Oxidizes readily in air to form unstable peroxides that may explode spontaneously [Bretherick 1979 p.151-154].
安全と保護具
Fire Fighting
Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:
Use water spray, powder, foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.
First Aid Measures
Fresh air, rest. Refer for medical attention.
Rinse skin with plenty of water or shower. Remove contaminated clothes.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention .
Storage Conditions
IN GENERAL MATERIALS ... TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS ... SHOULD BE STORED IN COOL ... VENTILATED PLACE, OUT OF ... SUN, AWAY FROM ... FIRE HAZARD ... BE PERIODICALLY INSPECTED & MONITORED. INCOMPATIBLE MATERIALS SHOULD BE ISOLATED.
Spillage Disposal
Personal protection: chemical protection suit. Do NOT let this chemical enter the environment. Ventilation. Collect leaking and spilled liquid in covered containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.
Preventive Measures
SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
毒性情報
Environmental Fate
TERRESTRIAL FATE: If released to soil, adsorption is expected to take place. However, it has been detected in groundwater beneath a municipal landfill(4) and the annual loadings of tetralin in runoff from land in the Canadian Ontario and Great Lakes water basins are estimated to be 1,053 and 2,270 kg/yr, respectively(5). Based on biodegradation half-lives of 4-13 days in aquatic systems(1-3), biodegradation in soil will be important(SRC).
AQUATIC FATE: Based on the estimated Henry's Law constant of 1.7X10-3 atm-cu m/mol at 25 °C(2), volatilization half-lives from a model river (1 m deep flowing 1 m/sec and wind velocity of 3 m/sec) and lake (1 m deep) can be estimated to be 4 hours and 5 days, respectively(1,SRC). An estimated Koc value of 1,800(3) suggests a high adsorption potential; furthermore, tetralin was detected in suspended solids from St. Louis Bay(4). Screening and grab sample tests indicate a biodegradation half-life of 4-13 days in seawater, groundwater, and river water(5-7). Bioconcentration in fish may be important in organisms that cannot metabolize tetralin(8).
ATMOSPHERIC FATE: Based on the experimental vapor pressure of 0.368 mm Hg at 25 °C(1), tetralin is expected to exist almost entirely in the vapor phase in the ambient atmosphere(2). Vapor phase tetralin will degrade rapidly in the ambient atmosphere by reaction with photochemically produced hydroxyl radicals with a half-life of about 11 hours(3,SRC). Vapor phase tetralin will also degrade in the ambient atmosphere at night-time by reaction with nitrate radicals with a half-life of about 3.6 days(4-5,SRC).
Signs and Symptoms
Cough. Dizziness. Headache. Nausea. Vomiting. Weakness.
Redness. Pain.
Pain. Redness. Blurred vision.
Abdominal pain. See Inhalation.
Ongoing Test Status
The following link will take the user to the National Toxicology Program (NTP) Test Agent Search Results page, which tabulates all of the "Standard Toxicology & Carcinogenesis Studies", "Developmental Studies", and "Genetic Toxicity Studies" performed with this chemical. Clicking on the "Testing Status" link will take the user to the status (i.e., in review, in progress, in preparation, on test, completed, etc.) and results of all the studies that the NTP has done on this chemical. [http://ntp-apps.niehs.nih.gov/ntp_tox/index.cfm?fuseaction=ntpsearch.searchresults&searchterm=119-64-2]
Effluent Concentrations
Tetralin was identified at a concn range of 13.3-154.3 ng/L in paper-mill effluents being discharged into the Rainy River(1). Tetralin was qualitatively identified in advanced waste treatment water from Lake Tahoe, CA in October of 1974(2). Tetralin was detected at a concn range of 2-58 ug/mL in 5 incinerator effluent extracts(3). Tetralin was detected 1 km from a Volvo assembly plant in Goteborg, Sweden at a concn of 4.6 ug/cu-m on January 14, 1981; regional Goteburg air contains less than 0.01 ug/cu-m tetralin(4). Also, 30 ug/cu-m tetralin was detected in air nearby a Saab assembly plant in Sweden on January 19, 1981(4). These data suggest tetralin is released from automobile assembly plants in emissions from solvents used during painting processes(4). Tetralin emission rates from well-tuned radiant and maltuned convective kerosene space heaters ranged from 100-240 ng/kJ(5).
Based upon monitoring data of runoff from land, approximately 1,053 and 2,271 kg tetralin/yr are input to the Canadian Lake Ontario and Canadian Great Lakes water basins, respectively(1). Tetralin was detected at a concn of 11 ng/g in wastewater from the petroleum refining industry after dissolved air flotation(2).
Human Toxicity Excerpts
... IN HIGH CONCENTRATIONS, /SRP: CNS DEPRESSANT/ ... .
... VAPORS ARE KNOWN TO PRODUCE HEADACHE, NAUSEA, VOMITING, AND IRRITATION OF CONJUNCTIVA AND OF RESPIRATORY TRACT MUCOSA. HIGH CONCENTRATIONS PRODUCE /CNS DEPRESSION/.
Dermal exposure to tetralin has caused eczematous dermatitis, but only rarely, and exposure to tetralin fumes in poorly ventilated places has produced /CNS depressant/ effects including marked restless, eye irritation, headache, malaise, asthenia, nausea, and vomiting.
A hallmark for tetralin exposure in man is the production of green colored urine. ... Green urine /was reported/ from a man who had ingested 5.7 g of a pigment called di-tetralin. ... Two cases of "tetralin urine" /were reported/ in painters who used tetralin-containing varnishes in a poorly ventilated area; these workers also showed intense irritation of the mucous membranes, profuse lacrimation , headache, and stupor.
For more Human Toxicity Excerpts (Complete) data for TETRALIN (12 total), please visit the HSDB record page.
Fish/Seafood Concentrations
Tetralin was detected in small mouth bass (Micropterus dolomieui) at a concn of 75.3 ng/g and yellow perch (Perca flavescens) at concns of 73.2 and 34.5 ng/g from the Rainy River which forms an international boundary between the U.S. and Canada(1).
Artificial Pollution Sources
Tetralin is released to the environment in emissions from automobile and diesel engines(1), incinerators(2), kerosene space heaters(3), and from automobile assembly plants during painting processes(4). Tetralin is released in effluents from paper-mills(5), petroleum refineries(6), and in advanced waste treatment effluents(7). Tetralin may also be released to surface waters via runoff from land(8).
Environmental Biodegradation
DEGRADATION IN SEA WATER BY OIL OXIDIZING MICROORGANISMS: 31% BREAKDOWN AFTER 21 DAYS AT 22 °C IN STOPPERED BOTTLES CONTAINING A 1000 PPM MIXTURES OF ALKANES, CYCLOALKANES, AND AROMATICS.
One screening test using sewage seed suggests that tetralin (initial concn of 3-10 ppm) biodegrades slowly in synthetic seawater; 3, 3, 2, and 3 percent theoretical BOD in 5, 10, 15, and 20 days, respectively(1). However, 0.0124 ppm tetralin was not detected after 10 days of incubation in artificial seawater at 25 °C indicating that tetralin is moderately oxidized(2). An initial concn of 0.0112 ppm tetralin was observed to degrade 100% in 8 days in a groundwater grab sample at 10 °C and pH 8(3). Tetralin (20.1 ppm initial concn) exhibited 18, 40, 58, 65, 70, and 75 percent theoretical CO2 production after 5, 10, 15, 20, 25, and 35 days, respectively, in water from the Ohio River at 22-25 °C and pH 7.2; the half-life in this study was 13 days and, after redosing, a half-life of 9 days was observed under the same conditions(4).
安全データ
- wgk
- 2
- tsca
- TSCA listed
- rtecs
- QK3850000
- ridadr
- UN 3082 9/PG 3
- 毒性
- LD50 orally in rats: 2.86 g/kg (Smyth)
- hs_code
- 2902 90 00
- risk_code
- 19-36/38-51/53-65-40
- 化審法
- (4)-574
- 消防法
- 危-4-3-III
- hazard_code
- Xi,N,Xn
- safety_code
- 26-28-61-28A-62-36/37
- hazard_class
- 9
- packing_group
- III
- 自然発火温度
- 723 °F
- Hazard Classifications
- Aquatic Chronic 2Asp. Tox. 1Carc. 2Eye Irrit. 2Skin Irrit. 2
- ストレージクラス
- 10 - Combustible liquids
- 有毒物質データの
- 119-64-2(Hazardous Substances Data)
毒性と防護
毒性LD50 2.86 g/kg(ラット,経口).
化学と産業
薬理情報
Metabolism/Metabolites
(1-(14)C)-TETRALIN IS METABOLIZED IN RABBITS BY HYDROXYLATION OF ALICYCLIC RING TO YIELD CONJUGATES OF AC-ALPHA-TETRALOL (60% OF DOSE), AC-BETA-TETRALOL (20%) & TETRALIN-1,2-DIOL (2.5%), & HYDROXYLATION OF AROMATIC RING ... YIELDING AR-BETA-TETRALOL (5,6,7,8-TETRAHYDRO-2-NAPHTHOL, 0.1%).
YIELDS 2-HYDROXYTETRALYLMERCAPTURIC ACID, 1,2,3,4-TETRAHYDRO-1-NAPHTHOL, 1,2,3,4-TETRAHYDRO-2-NAPHTHOL IN RABBIT. YIELDS 1,2,3,4-TETRAHYDRO-1,2-DIHYDROXYNAPHTHALENE, 5,6,7,8-TETRAHYDRO-2-NAPHTHOL IN RABBIT. /FROM TABLE/
In rabbits, the main urinary metabolite was the glucuronide of alpha-tetralol (52.4%). Other conjugated metabolites were beta-tetralol (25.3%), 4-hydroxy-alpha-tetralone (6.1%), and cis-tetralin-1,2-diol (0.4%). Using rat liver homogenates, it was shown that conversion of tetralin to tetralol requires reduced nicotinamide adenine dinucleotide phosphate and that tetralin hydroperoxide is a probable intermediate. Further study confirmed this possibility and indicated that tetralin hydroxylation proceeds via a radical mechanism similar to that of lipid peroxidation.
Tetralin, a component of fuels, solvents, and varnishes, is metabolized in male Fischer 344 rats to 1-tetralol, 2-tetralol, 2-hydroxyl-1-tetralone, 4-hydroxyl-1-tetralone, 1,2-tetralindiol, and 1,4-tetralindiol.
Absorption, Distribution and Excretion
ABSORBED VAPOR IS EXCRETED BY KIDNEYS AS ALPHA- AND BETA-TETRAHYDRONAPHTHOLS ANDTHEIR GLUCURONIDES ... .
RADIOACTIVE TETRALIN, WHEN ADMIN TO RABBIT, WAS EXCRETED IN URINE AS GLUCURONIDEAT 87-99% AND IN FECES AT 0.6-1.8% OF ORIGINAL DOSE. ... WAS ABSORBED BY MUSSEL BUT NOT METABOLIZED; ... UP TO 80% WAS RELEASED IN UNCHANGED FORM WHEN THE ORGANISM WAS TRANSFERRED TO FRESH SEAWATER.
When radioactive tetralin was fed to rabbits, 87-90% of the activity was excreted in the urine in 2 days and 0.5-3.7% on the third day. The feces contained only 0.6-1.8%. No radioactivity was found in the breath, and negligible amounts were retained in the tissues. About 90-99% of the dose was accounted for.
用途と製造
Uses
Used in the solvent, paint, varnish, and rubber industries; tetralin is used in shoe polish and floor wax; [HSDB]
Painting (Solvents) [Category: Paint]
SOLVENT FOR CAMPHOR, SULFUR & IODINE; IN PAINT THINNERS; AS PAINT REMOVER WHEN MIXED WITH DECALIN OR WHITE SPIRIT; AS INSECTICIDE FOR CLOTHES MOTH; AS SUBSTITUTE FOR TURPENTINE & PETROL IN GERMANY.
SOLVENT FOR NAPHTHALENE, FATS, RESINS, OILS, WAXES, USED INSTEAD OF TURPENTINE IN LACQUERS, SHOE POLISHES, FLOOR WAXES; DEGREASING AGENT.
IN PLANT PATHOLOGY, TETRALIN HAS BEEN SUCCESSFUL IN TOTAL DESTRUCTION OF CROWN GALL AND OLIVE KNOT NEOPLASMS.
A COMBINATION OF 31% TETRAHYDRONAPHTHALENE AND 0.03% CUPRIC OLEATE (CUPREX) IS PROMOTED AS A PEDICULICIDE AND MITICIDE, BUT ITS TRUE EFFICACY REMAINS TO BE DETERMINED.
U.S. Production
2023: <50,000 lb
(1975) GREATER THAN 9.08X10+5 G
(1972) PROBABLY GREATER THAN 4.54X10+5 G
Methods of Manufacturing
BY CATALYTIC HYDROGENATION OF PURIFIED NAPHTHALENE.
... FORMED DURING ACIDIC, CATALYTIC HYDROCRACKING OF PHENANTHRENE.
ISOLATED FROM MIDDLE FRACTION OF COAL OIL.
Hydrogenation of naphthalene in the presence of a catalyst at 150 °C.
Formulations/Preparations
"ESSENCE OF TETRALIN" IS COMMERCIAL MIXTURE OF TETRALIN & HEXALIN, PALE YELLOW LIQUID WHICH IS BETTER SOLVENT OF RESINS THAN TETRALIN ALONE ... .
GRADES OR PURITY: 90+%
THE COMMERCIAL PRODUCT TYPICALLY HAS A TETRAHYDRONAPTHALENE CONTENT OF >97 wt%.
Grade: Technical
General Manufacturing Information
Naphthalene, 1,2,3,4-tetrahydro-: ACTIVE
PEROXIDE FORMATION /FROM CONTACT WITH AIR/ IS PREVENTED BY THE ADDITION OF AN ANTIOXIDANT, SUCH AS HYDROQUINONE.
Compatible with natural and synthetic vehicles.
The germicidal action of quaternary ammonium cmpd was increased by a factor of 3 with the addition of tetralin.
Tetralin ring used in a group of new fungicidal phenols, which have lower phyto and mammalian toxicity as compared to known phenolic fungicides.
Used as a chemical intermediary in the formation of acylisopropyltetramethylindans which have a musk aroma and enhance the aroma of perfume cmpd and colognes.
応用分野
解説テトラリン,無色の液体.融点-36 ℃,沸点206 ℃.d20 0.971.n20D 1.5410.さらに水素化すればデカリンとなり,酸化すればフタル酸を与える.水に不溶,エタノール,エーテル,ベンゼンなど多くの有機溶媒に可溶.おもに塗料用溶剤として用いられる.森北出版「化学辞典(第2版)
用途石油製品の硫黄分試験用溶媒。
用途溶剤(ワックス、レジン、ゴム、ガム等)、ペイント、ワニス等の原料。
用途塗料溶剤、繊維洗浄剤
使用1,2,3,4-Tetrahydronaphthalene, is used as an intermediate for organic synthesis, solvent. It is used as a solvent.It is also used for the laboratory synthesis of dry HBr gas.
一般的な説明A light colored liquid. May be irritating to skin, eyes and mucous membranes. Flash point 100-141°F.
使用用途テトラリンは、主に、塗料用の溶剤として利用される他、油脂・脂肪・樹脂・ゴム・ロウ・等の溶剤としても用いられています。また、機械部品等の油脂の洗浄剤としても使用可能です。特に、浸透力が大きいため、通常の溶剤では洗浄しにくい細かい部分の洗浄を得意としています。 他にも医薬中間体を作る際の反応溶媒としても用いられています。さらに、水素化することによって、デカリンが生成されるため、その合成原料として利用可能です。その他、臭素と反応することによって、を発生するため、臭化水素の実験室的製造に使用されることもあります。
調製方法
Tetralin is prepared by the catalytic hydrogenation of naphthalene or during acidic, catalytic hydrocracking of phenanthrene. At 700℃, tetralin yields tars that contain appreciable quantities of 3,4-benzopyrene (172a).
純化方法Wash tetralin with successive portions of conc H2SO4 until the acid layer is no longer coloured, then wash it with aqueous 10% Na2CO3, and then distilled water. Dry (CaSO4 or Na2SO4), filter, reflux and fractionally distil it under under reduced pressure from sodium or BaO. It can also be purified by repeated fractional freezing. Bass [J Chem Soc 3498 1964] freed tetralin, purified as above, from naphthalene and other impurities by conversion to ammonium tetralin-6-sulfonate. Concentrated H2SO4 (150mL) is added slowly to stirred tetralin (272mL) which is then heated on a water bath for about 2hours for complete solution. The warm mixture, when poured into aqueous NH4Cl solution (120g in 400mL water), gives a white precipitate which, after filtering off, is crystallised from boiling water, washed with 50% aqueous EtOH and dried at 100o. Evaporation of its boiling aqueous solution on a steam bath removes traces of naphthalene. The pure salt (229g) is mixed with conc H2SO4 (266mL) and steam distilled from an oil bath at 165-170o. An ether extract of the distillate is washed with aqueous Na2SO4, and the ether is evaporated, prior to distilling the tetralin from sodium. Tetralin has also been purified via barium tetralin-6-sulfonate, conversion to the sodium salt and decomposed in 60% H2SO4 using superheated steam. [Beilstein 5 H 491, 5 III 1219, 5 IV 1388.]
上流・下流製品情報
上流原料
下流製品
補足説明
定義ChEBI: An ortho-fused bicyclic hydrocarbon that is 1,2,3,4-tetrahydro derivative of naphthalene.
関連反応
関連ノート
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