# NIOSH Pocket Guide to Chemical Hazards
1,1-Dichloroethane | CAS 75-34-3
CHCl2CH3 | RTECS KI0175000
Synonyms & Trade Names Asymmetrical dichloroethane; Ethylidene chloride; 1,1-Ethylidene dichloride | DOT ID & Guide 2362 130
Exposure Limits | NIOSH REL: TWA 100 ppm (400 mg/m3) See Appendix C (Chloroethanes)
OSHA PEL: TWA 100 ppm (400 mg/m3)
IDLH 3000 ppm | 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 73°F and BP at or above 100°F.
Incompatibilities & Reactivities Strong oxidizers, strong caustics
Measurement Methods NIOSH 1003; OSHA 7
Personal Protection & Sanitation 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
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 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
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