71-55-6 structure, C2H3Cl3
CAS No.: 71-55-6 Formula: C2H3Cl3 Molecular Weight: 133.40400
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CAS No.:




Molecular Weight: 133.40400
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The organic compound 1,1,1-trichloroethane, also known as methyl chloroform, is a chloroalkane. This colourless, sweet-smelling liquid was once produced industrially in large quantities for use as a solvent. It is regulated by the Montreal Protocol as an ozone-depleting substance and its use is being rapidly phased out.

Basic Info

Chemical Name



Ethana; f140a; CH3CCl3; trichloroethane,1,1,1-; methylchloroform; Ethane, 1,1,1-trichloro-; Chlorothene; methyl chloroform; 2,2,2-trichloroethane; Expand



Molecular Formula


Molecular Weight






Numbering system

UNII 113C650IR1


Appearance & Physical State

colourless liquid with a mild ether-like odour



Boiling Point


Melting Point


Flash Point


Refractive Index


Water Solubility

1.4 g/L (20 ºc)

Storage Condition


Vapor Density

4.6 (vs air)

Vapor Pressure

100 mm Hg ( 20 °C)

Safety Info



Hazard Class


Safety Statements


HS Code


Packing Group


WGK Germany



UN 2831

Risk Statements

R19; R20; R40; R59; R66

Hazard Codes


SDS 1.0


SDS 1.0

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According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 18, 2017

Revision Date: Aug 18, 2017


1.1 GHS Product identifier

Product name 1,1,1-trichloroethane

1.2 Other means of identification

Product number -
Other names R-140a

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Volatile organic compounds
Uses advised against no data available

1.4 Supplier's details

Company MOLBASE (Shanghai) Biotechnology Co., Ltd.
Address Floor 4 & 5, Building 12, No. 1001 North Qinzhou Road,
Xuhui District, Shanghai, China
Telephone +86(21)64956998
Fax +86(21)54365166

1.5 Emergency phone number

Emergency phone number +86-400-6021-666
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Acute toxicity - Inhalation, Category 4

Hazardous to the ozone layer, Category 1

2.2 GHS label elements, including precautionary statements

Signal word


Hazard statement(s)

H332 Harmful if inhaled

H420 Harms public health and the environment by destroying ozone in the upper atmosphere

Precautionary statement(s)

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P271 Use only outdoors or in a well-ventilated area.


P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.

P312 Call a POISON CENTER/doctor/…if you feel unwell.




P502 Refer to manufacturer or supplier for information on recovery or recycling

2.3 Other hazards which do not result in classification


3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
1,1,1-trichloroethane 1,1,1-trichloroethane 71-55-6 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

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

In case of skin contact

Remove contaminated clothes. Rinse and then wash skin with water and soap.

In case of eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

If swallowed

Do NOT induce vomiting. Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention .

4.2 Most important symptoms/effects, acute and delayed

INHALATION: symptoms range from loss of equilibrium and incoordination to loss of consciousness; high concentration can be fatal due to simple asphyxiation combined with loss of consciousness. INGESTION: produces effects similar to inhalation and may cause some feeling of nausea. EYES: slightly irritating and lachrymatory. SKIN: defatting action may cause dermatitis. (USCG, 1999)

4.3 Indication of immediate medical attention and special treatment needed, if necessary

Emergency and supportive measures: 1. Maintain an open airway and assist ventilation if necessary. Administer supplemental oxygen and treat hydrocarbon aspiration pneumonitis if it occurs. 2. Treat seizures, coma, and arrhythmias if they occur. Caution: Avoid the use of epinephrine or other sympathomimetic amines because of the risk of inducing or aggravating cardiac arrhythmias. Tachyarrhythmias caused by myocardial sensitization may be treated with propranolol ... or esmolol ... . 3. Monitor for a minimum of 4-6 hours after significant exposure. /Trichloroethane, trichloroethylene, and tetrachloroethylene/

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media


5.2 Specific hazards arising from the chemical

Special Hazards of Combustion Products: Toxic and irritating gases are generated in fires. (USCG, 1999)

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Personal protection: self-contained breathing apparatus. Ventilation. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

6.3 Methods and materials for containment and cleaning up

Environmental considerations: land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. /SRP: If time permits, pits, ponds, lagoons, soak holes, or holding areas should be sealed with an impermeable flexible membrane liner./ Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commmercial sorbents.

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Separated from food and feedstuffs, strong oxidants, aluminium, magnesium and zinc. Cool. Dry. Store in an area without drain or sewer access.Storage temp: Ambient; Venting: Pressure-vacuum.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

Recommended Exposure Limit: 15-Min Ceiling Value: 350 ppm (1900 mg/cu m).

NIOSH considers 1,1,1-trichloroethane to be a potential occupational carcinogen.

NIOSH usually recommends that occupational exposures to carcinogens be limited to the lowest feasible concentration.

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state colourless liquid with a mild ether-like odour
Colour Colorless liquid
Odour ... Mild chloroform-like odor
Melting point/ freezing point -33ºC
Boiling point or initial boiling point and boiling range 74-76ºC
Flammability Combustible Liquid, but burns with difficulty.Combustible under specific conditions. Heating will cause rise in pressure with risk of bursting. Gives off irritating or toxic fumes (or gases) in a fire. See Notes.
Lower and upper explosion limit / flammability limit Lower flammable limit: 7.5% by volume; Upper flammable limit: 12.5% by volume
Flash point 11ºC
Auto-ignition temperature 500°C (USCG, 1999)
Decomposition temperature no data available
pH no data available
Kinematic viscosity 0.00086 Pa.s at 20°C
Solubility In water:1.4 g/L (20 ºc)
Partition coefficient n-octanol/water (log value) log Kow = 2.49
Vapour pressure 100 mm Hg ( 20 °C)
Density and/or relative density 1.3376
Relative vapour density 4.6 (vs air)
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under recommended storage conditions.

10.3 Possibility of hazardous reactions

It burns only in excess of oxygen or in air if a strong source of ignition is present.The vapour is heavier than air.1,1,1-TRICHLOROETHANE decomposes in the presence of chemically active metals. This includes aluminum, magnesium and their alloys. It will react violently with dinitrogen tetraoxide, oxygen, liquid oxygen, sodium and sodium-potassium alloys. It will also react violently with acetone, zinc and nitrates. It can react with sodium hydroxide. It is incompatible with strong oxidizers and strong bases. Mixtures with potassium or its alloys are shock-sensitive and may explode on light impact. This chemical can react with an aqueous suspension of calcium hydroxide, and with chlorine in sunlight. It will attack some forms of plastics, rubber and coatings. Upon contact with hot metal or on exposure to ultraviolet radiation, it will decompose to form irritant gases. A cobalt/molybdenum-alumina catalyst will generate a substantial exotherm on contact with its vapor at ambient temperatures. Hazardous reactions also occur with (aluminum oxide + heavy metals). .

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

Reacts slowly with water, releasing corrosive hydrochloric acid.

10.6 Hazardous decomposition products

When heated to decomposition, it emits irritating gases and toxic fumes of carbon monoxide, carbon dioxide, hydrogen chloride gas, chlorine, and phosgene.

11.Toxicological information

Acute toxicity

  • Oral: LD50 Rat oral 10.3-12.3 g/kg
  • Inhalation: LC50 Rat inhalation 24,000 ppm/1 hr
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available


Cancer Classification: Group D Not Classifiable as to Human Carcinogenicity

Reproductive toxicity

Epidemiologic studies have found no relationship between adverse pregnancy outcomes and exposure of mothers or fathers to methyl chloroform. Animal studies have not reported developmental or reproductive effects from exposure to methyl chloroform.

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: EC50; Species: Pimephales promelas (Fathead minnow) weight 1.04 g, length 49.0 mm; Conditions: freshwater, static, 12°C, pH 7.8-8.0, dissolved oxygen > or =5.0 mg/L; Concentration: 12100 ug/L for 24 hr (10900-13500 ug/L); Effect: intoxication, immobilization
  • Toxicity to daphnia and other aquatic invertebrates: EC50; Species: Daphnia magna (Water flea) age <24 hr; Conditions: freshwater, static; Concentration: 11.2 ppm for 48 hr (9.7-12.8 ppm); Effect: intoxication, immobilization /96.4% purity
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

AEROBIC: No degradation was observed in subsurface soils in 27 weeks of incubation; however, in loamy sand, slow degradation was observed under acclimated conditions(1,2). Slow degradation may occur in water under anaerobic or aerated conditions; degradation may take several weeks and acclimation is important(3,4). In seawater, a half-life of 9 months has been determined and vinylidene chloride is the degradation product(5). No degradation in river water was found(6). No utilization of 1,1,1-trichloroethane occurred in a continuously-fed aerobic biofilm reactor that utilized acetate as its primary substrate; however, 98% removal was obtained in a similar anaerobic reactor with a 2-day retention time after 8 wk acclimation(8). 1,1,1-Trichloroethane degraded to vinylidene chloride as a first step in its biotransformation in microcosms containing aquifer water and sediment collected from uncontaminated sites in the Everglades(7); considerable degradation occurred within two weeks(7). Field evidence of biodegradation in aquifers was obtained by following the concentration of 1,1,1-trichloroethane in a confined aquifer after it was injected with reclaimed groundwater(8); the half-life of 1,1,1-trichloroethane was 231 days with biodegradation given as the probable cause of loss(8). The biodegradation half-life of 1,1,1-trichloroethane in non-adapted aerobic soils from Louisiana and Oklahoma were reported as >97 days and >485 days, respectively(9). 1,1,1-Trichloroethane at 100 mg/L achieved 0% of its theoretical BOD using an activated sludge inoculum at 30 mg/L over a 2 week incubation period in the Japanese MITI test(10).

12.3 Bioaccumulative potential

A BCF range of 0.7 to 4.9 was measured using carp (Cyprinus carpio) which were exposed over an 6-week period(1). A BCF of 8.9 was determined in bluegill sunfish (Lepomis macrochirus) in a 28 day test(2). A BCF of 2.95 was measured in killfish (Oryzias latipes) over an 8-day exposure period(3). According to a classification scheme(4), these BCF values suggest that bioconcentration in aquatic organisms is low(SRC).

12.4 Mobility in soil

The adsorption of 1,1,1-trichloroethane was studied using three US soils(1); equilibrium adsorption coefficients (Kd) of 1.8, 1.592, and 1.338 were measured using a soil from Missouri (11.4% sand, 52.7% silt, 33.4% clay, 2.4% organic matter), California (45.1% sand, 35.2% silt, 21.7% clay, 1.7% organic matter) and Florida (9.17% sand, 6.3% silt, 2% clay, 1.6% organic matter), respectively(1); these adsorption coefficients correspond to Koc values of 120 (Missouri soil), 151 (California soil) and 135 (Florida soil). A Koc value of 66 was reported for 1,1,1-trichloroethane in an unspecified soil(2). According to a classification scheme(3), these Koc values suggests that 1,1,1-trichloroethane is expected to have high mobility in soil(SRC).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods


The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: UN2831 IMDG: UN2831 IATA: UN2831

14.2 UN Proper Shipping Name


14.3 Transport hazard class(es)

ADR/RID: 6.1 IMDG: 6.1 IATA: 6.1

14.4 Packing group, if applicable


14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
1,1,1-trichloroethane 1,1,1-trichloroethane 71-55-6 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Listed.
China Catalog of Hazardous chemicals 2015 Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 18, 2017
Revision Date Aug 18, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%


  • IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
  • HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
  • IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
  • CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
  • ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
  • Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
  • ECHA - European Chemicals Agency, website: https://echa.europa.eu/

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.


13C NMR : in CDCl3Expand

NMR Spectrum 13C NMR : in CDCl3


C2 H3 Cl3 0.5 ml : 1.5 ml CDCl3

71-55-6 NMR spectrum

ppm Int. Assign.
95.29 423 1
45.38 1000 2

IR : liquid filmExpand
Mass Expand
Raman : 4880 A,200 M,liquidExpand
Exposure Route Type of Test Species Observed Dose/Duration Toxic Effects
Administration into the eye Standard Draize test Human - man 450 ppm/8H -
Administration onto the skin Standard Draize test Rodent - rabbit 5 gm/12D (Intermittent) -
Administration onto the skin Standard Draize test Rodent - rabbit 20 mg/24H -
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