International Chemical Safety Cards CYANURIC ACID ICSC: 1313 s-Triazine-2,4,6-triol Isocyanuric acid 1,3,5-Triazine-2,4,6(1H,3H,5H) - trione C3H3N3O3 Molecular mass: 129.09 ICSC #    1313 CAS #     108-80-5 RTECS # XZ1800000 November 27, 1998 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Gives off irritating or toxic fumes (or gases) in a fire. Water spray, alcohol-resistant foam, powder, carbon dioxide. EXPLOSION Above 320-360°C explosive vapour/air mixtures may be formed. EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Sore throat. Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN Protective gloves. Rinse skin with plenty of water or shower.  •EYES Redness. 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 Abdominal pain. (See Inhalation). Do not eat, drink, or smoke during work. Give plenty of water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place. (Extra personal protection: P2 filter respirator for harmful particles). Dry. Well closed. Keep in a well-ventilated room. Do not transport with food and feedstuffs. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1313 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 CYANURIC ACID ICSC: 1313 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS WHITE, HYGROSCOPIC CRYSTALLINE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating above 320-350°C producing (highly) toxic fumes including nitrogen oxides and cyanic acid. Reacts with chlorine causing explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation. 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 irritates the respiratory tract and the eyes. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the kidneys. PHYSICAL PROPERTIES Decomposes below melting point at 320-360°C Solubility in water, g/100 ml at 25°C: 0.2 ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 1313 CYANURIC ACID (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.