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o-Chlorobenzylidene malononitrile

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Synonyms & Trade Names
2-Chlorobenzalmalonitrile, CS, OCBM
CAS No.
2698-41-1
RTECS No.
OO3675000
DOT ID & Guide
2810 153
Formula
ClC₆H₄CH=C(CN)₂
Conversion
1 ppm = 7.71 mg/m3
IDLH
2 mg/m3
See: 2698411
Exposure Limits
NIOSH REL
C 0.05 ppm (0.4 mg/m3) [skin]
OSHA PEL
TWA 0.05 ppm (0.4 mg/m3) See Appendix G
Measurement Methods
NIOSH P&CAM304 (II-5)
See: NMAM or OSHA Methods
Physical Description
White crystalline solid with a pepper-like odor.
Molecular Weight
188.6
Boiling Point
590-599°F
Melting Point
203-205°F
Solubility
Insoluble
Vapor Pressure
0.00003 mmHg
Ionization Potential
?
Specific Gravity
?
Flash Point
?
Upper Explosive Limit
?
Lower Explosive Limit
?
Minimum Explosive Concentration
25 g/m3
Combustible Solid
Incompatibilities & Reactivities
Strong oxidizers
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
Pain, burn eyes, lacrimation (discharge of tears), conjunctivitis; erythema (skin redness) eyelids, blepharospasm; irritation throat, cough, chest tightness; headache; erythema (skin redness), vesiculation skin
Target Organs
Eyes, skin, respiratory system
Personal Protection/Sanitation
(See protection codes)
Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated/Daily
Remove:When wet or contaminated
Change:Daily
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 2 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode£
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern and having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(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 canister providing protection against the compound of concern and having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

See also
INTRODUCTION   ICSC CARD: 1065
Page last reviewed: October 30, 2019
Content source: National Institute for Occupational Safety and Health