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Methyl chloroform

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Synonyms & Trade Names
Chlorothene, 1,1,1-Trichloroethane, 1,1,1-Trichloroethane (stabilized)
CAS No.
71-55-6
RTECS No.
KJ2975000
DOT ID & Guide
2831 160
Formula
CH₃CCl₃
Conversion
1 ppm = 5.46 mg/m3
IDLH
700 ppm
See: 71556
Exposure Limits
NIOSH REL
C 350 ppm (1900 mg/m3) [15-minute] See Appendix C (Chloroethanes)
OSHA PEL
TWA 350 ppm (1900 mg/m3) See Appendix G
Measurement Methods
NIOSH 1003
See: NMAM or OSHA Methods
Physical Description
Colorless liquid with a mild, chloroform-like odor.
Molecular Weight
133.4
Boiling Point
165°F
Freezing Point
-23°F
Solubility
0.4%
Vapor Pressure
100 mmHg
Ionization Potential
11.00 eV
Specific Gravity
1.34
Flash Point
?
Upper Explosive Limit
12.5%
Lower Explosive Limit
7.5%
Combustible Liquid, but burns with difficulty.
Incompatibilities & Reactivities
Strong caustics; strong oxidizers; chemically-active metals such as zinc, aluminum, magnesium powders, sodium & potassium; water [Note: Reacts slowly with water to form hydrochloric acid.]
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin; headache, lassitude (weakness, exhaustion), central nervous system depression, poor equilibrium; dermatitis; cardiac arrhythmias; liver damage
Target Organs
Eyes, skin, central nervous system, cardiovascular system, liver
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 700 ppm:
(APF = 10) Any supplied-air respirator*
(APF = 50) Any self-contained breathing apparatus with a full facepiece

Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus

Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 0079   MEDICAL TESTS: 0141
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health