International Chemical Safety Cards AZOBIS(ISOBUTYRONITRILE) ICSC: 1090 2,2'-Azobis(2-methylpropanenitrile) 2,2'-Azodiisobutyronitrile 2,2'-Dicyano-2,2'-azopropane 2,2'-Dimethyl-2,2'azodipropionitrile C8H12N4 / (CH3)2(CN)CN=NC(CN)(CH3)2 Molecular mass: 164.2 ICSC #    1090 CAS #     78-67-1 RTECS # UG0800000 UN #        3234 EC #         608-019-00-1 April 20, 2004 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Highly flammable. Explosive. NO open flames, NO sparks, and NO smoking. Water in large amounts, water spray. EXPLOSION Finely dispersed particles form explosive mixtures in air. Risk of fire and explosion when dissolving in organic solvents. Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Do NOT expose to friction or shock. In case of fire: keep drums, etc., cool by spraying with water. EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Safety goggles, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Headache. Nausea. Weakness. Convulsions. Do not eat, drink, or smoke during work. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Give a slurry of activated charcoal in water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Consult an expert! Do NOT let this chemical enter the environment. Remove all ignition sources. Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting. Personal protection: A/P2 filter respirator for organic vapour and harmful dust. Fireproof. Cool. Separated from strong oxidants and incompatible materials. See Chemical Dangers. E symbol Xn symbol R: 2-11-20/22-52/53 S: 2-39-41-47-61 UN Hazard Class: 4.1 SEE IMPORTANT INFORMATION ON BACK ICSC: 1090 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards AZOBIS(ISOBUTYRONITRILE) ICSC: 1090 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE POWDER PHYSICAL DANGERS: If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc. CHEMICAL DANGERS: The substance decomposes due to warming producing toxic fumes such as tetramethylsuccinonitrile (see ICSC 1121) and cyanide. May decompose explosively on shock, friction, or concussion. May explode on heating. Reacts violently with alcohols, oxidants, ketones such as acetone, aldehydes and hydrocarbons such as heptane causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance may cause effects on the central nervous system . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the liver. PHYSICAL PROPERTIES Density: 1.1 g/cm3 Solubility in water, g/100 ml at 20°C: none Vapour pressure, Pa at 20°C: <1 Auto-ignition temperature: 64°C ENVIRONMENTAL DATA The substance is harmful to aquatic organisms. The substance may cause long-term effects in the aquatic environment. N O T E S Temperature of decomposition unknown in literature. Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Aceto azib, ADZN, AIBN, AIVN, AZDH, CHKHZ, Genitron, Pianofor AN, Porofor N, Porofor-57 and Vazo (64) are trade names. NFPA Code: H3; F-; R2. Transport Emergency Card: TEC (R)-41GSR2-S ADDITIONAL INFORMATION ICSC: 1090 AZOBIS(ISOBUTYRONITRILE) (C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.