International Chemical Safety Cards DICYANDIAMIDE ICSC: 0650 Dicyanodiamide Cyanoguanidine Dicyanediamide NH2(NH)CNHCN / C2H4N4 Molecular mass: 84.1 ICSC #    0650 CAS #     461-58-5 RTECS # ME9950000 March 26, 1998 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. In case of fire in the surroundings: all extinguishing agents allowed. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Local exhaust. Fresh air, rest.  •SKIN Protective gloves. Rinse skin with plenty of water or shower.  •EYES Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Rinse mouth. Give plenty of water to drink. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting, then remove to safe place. Separated from strong oxidants, strong acids. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0650 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 DICYANDIAMIDE ICSC: 0650 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALLINE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic gases includingammonia. See ICSC 0414. Reacts violently with strong oxidants, such as ammonium nitrate causing fire and explosion hazard. Reacts with acids to produce toxic gases including hydrogen cyanide. See ICSC 0492. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: EFFECTS OF SHORT-TERM EXPOSURE: EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point: 211°C Density: 1.4 mg/cm 3 Solubility in water, g/100 ml at 25°C: 4.13 Octanol/water partition coefficient as log Pow: -1.5 (estimated) ENVIRONMENTAL DATA N O T E S In solution the substance decomposes above 80°C yielding ammonia (see ICSC 0414). ADDITIONAL INFORMATION ICSC: 0650 DICYANDIAMIDE (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.