1,2-Dichloroethylene

Synonyms & Trade Names

Acetylene dichloride, cis-Acetylene dichloride, trans-Acetylene dichloride, sym-Dichloroethylene

CAS No.

540-59-0

RTECS No.

KV9360000

DOT ID & Guide

1150 130P

Formula

ClCH=CHCl

Conversion

1 ppm = 3.97 mg/m³

IDLH

1000 ppm
See: 540590

Exposure Limits

NIOSH REL

TWA 200 ppm (790 mg/m³)

OSHA PEL

TWA 200 ppm (790 mg/m³)

Measurement Methods

NIOSH 1003;
OSHA 7
See: NMAM or OSHA Methods

Physical Description

Colorless liquid (usually a mixture of the cis & trans isomers) with a slightly acrid, chloroform-like odor.

Molecular Weight

97.0

Boiling Point

118-140°F

Freezing Point

-57 to -115°F

Solubility

0.4%

Vapor Pressure

180-265 mmHg

Ionization Potential

9.65 eV

Specific Gravity

(77°F): 1.27

Flash Point

36-39°F

Upper Explosive Limit

12.8%

Lower Explosive Limit

5.6%

Class IB Flammable Liquid: Fl.P. below 73°F and BP at or above 100°F.

Incompatibilities & Reactivities

Strong oxidizers, strong alkalis, potassium hydroxide, copper [Note: Usually contains inhibitors to prevent polymerization.]

Exposure Routes

inhalation, ingestion, skin and/or eye contact

Symptoms

irritation eyes, respiratory system; central nervous system depression

Target Organs

Eyes, respiratory system, central nervous system

Personal Protection/Sanitation

(See protection codes)
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 wash promptly
Breathing:Respiratory support
Swallow:Medical attention immediately

Respirator Recommendations

NIOSH/OSHA

Up to 1000 ppm:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode^£
(APF = 25) Any powered, air-purifying respirator with organic vapor cartridge(s)^£
(APF = 50) Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s)
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister
(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

Important additional information about respirator selection

1,2-Dichloroethylene

NIOSH REL

OSHA PEL

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