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o-CHLOROBENZYLIDENEMALONONITRILE ICSC: 1065
Date of Peer Review: October 2002

[2-(Chlorophenyl)methylene]malononitrile
2-Chlorobenzylidene malononitrile
(o-Chlorobenzal)malononitrile
beta,beta-Dicyano-o-chlorostyrene
[(2-Chlorophenyl)methylene]propanedinitrile
CS (riot control agent)
CAS # 2698-41-1 C10H5ClN2 / ClC6H4CH=C(CN)2
RTECS # OO3675000 Molecular mass: 188.6
UN # 3276
EC #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder or carbon dioxide.
EXPLOSION Finely dispersed particles form explosive mixtures in air.
Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.

EXPOSURE
PREVENT DISPERSION OF DUST!

Inhalation Cough. Dizziness. Headache. Laboured breathing. Nausea. Sore throat. Vomiting.
Local exhaust.
Fresh air, rest.
Skin Redness. Burning sensation. Pain. Blisters.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
Eyes Causes watering of the eyes. Redness. Pain.
Safety goggles, or face shield.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Burning sensation in the throat and chest.
Do not eat, drink, or smoke during work.
Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Vacuum spilled material. (Extra personal protection: P3 filter respirator for toxic particles.)
Do not transport with food and feedstuffs.
EU Classification
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT1-III
Separated from food and feedstuffs. Keep in a well-ventilated room.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

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o-CHLOROBENZYLIDENEMALONONITRILE ICSC: 1065
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE CRYSTALLINE POWDER, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
Reacts with strong bases or acids producing ammonia. The substance decomposes on burning producing toxic fumes including hydrogen chloride, hydrogen cyanide and nitrogen oxides. Reacts violently with strong oxidants causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.05 ppm (Ceiling value); (skin); A4; (ACGIH 2002).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or when dispersed, especially if powdered.

EFFECTS OF SHORT-TERM EXPOSURE:
Causes watering of the eyes. The substance is severely irritating to the eyes, the skin and the respiratory tract The substance may cause effects on the lungs.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization.
PHYSICAL PROPERTIES
Boiling point: 310-315C
Melting point: 93-96C
Solubility in water, g/100 ml at 20C: 0.1-0.5
Vapour pressure, Pa at C: 0.0045
Relative vapour density (air = 1): 6.5
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms.
NOTES
The occupational exposure limit value should not be exceeded during any part of the working exposure.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999