NIOSH Pocket Guide to Chemical Hazards


CAS 75-34-3


RTECS KI0175000
Synonyms & Trade Names
Asymmetrical dichloroethane; Ethylidene chloride; 1,1-Ethylidene dichloride
DOT ID & Guide
2362 130


NIOSH REL: TWA 100 ppm (400 mg/m3) See Appendix C (Chloroethanes)
OSHA PEL: TWA 100 ppm (400 mg/m3)
IDLH 3000 ppm See: 75343 Conversion 1 ppm = 4.05 mg/m3
Physical Description
Colorless, oily liquid with a chloroform-like odor.
MW: 99.0
BP: 135°F
FRZ: -143°F
Sol: 0.6%
VP: 182 mmHg
IP: 11.06 eV

Sp.Gr: 1.18
Fl.P: 2°F
UEL: 11.4%
LEL: 5.4%

Class IB Flammable Liquid: Fl.P. below 73F and BP at or above 100F.
Incompatibilities & Reactivities
Strong oxidizers, strong caustics
Measurement Methods
NIOSH 1003; OSHA 7
See: NMAM or OSHA Methods
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet (flammable)
Change: No recommendation

First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap flush promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Important additional information about respirator selection
Respirator Recommendations NIOSH/OSHA
Up to 1000 ppm:
(APF = 10) Any supplied-air respirator
Up to 2500 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 3000 ppm:
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator 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
(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
Exposure Routes inhalation, ingestion, skin and/or eye contact
Symptoms Irritation skin; central nervous system depression; liver, kidney, lung damage
Target Organs Skin, liver, kidneys, lungs, central nervous system
See also: INTRODUCTION   See ICSC CARD: 0249