International Chemical Safety Cards SODIUM THIOCYANATE ICSC: 0675 Thiocyanic acid, sodium salt Sodium sulfocyanate Sodium rhodanide NaSCN Molecular mass: 81.1 ICSC #    0675 CAS #     540-72-7 RTECS # XL2275000 EC #         615-004-00-3 October 28, 2004 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: use appropriate extinguishing media. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Further see Ingestion. Local exhaust or breathing protection. Fresh air, rest.  •SKIN Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •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 Nausea. Vomiting. Diarrhoea. Weakness. Confusion. Convulsions. Do not eat, drink, or smoke during work. Rinse mouth. Give a slurry of activated charcoal in water to drink. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into covered containers. Carefully collect remainder. Personal protection: P2 filter respirator for harmful particles. Separated from acids, bases , oxidants , food and feedstuffs . Dry. Well closed. Note: A Xn symbol R: 20/21/22-32-52/53 S: 2-13-61 SEE IMPORTANT INFORMATION ON BACK ICSC: 0675 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 SODIUM THIOCYANATE ICSC: 0675 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS HYGROSCOPIC CRYSTALS OR WHITE POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic fumesincludingsulfur oxides,nitrogen oxides, sodium oxide and cyanides. Reacts violently with acids , strong bases and strong oxidants . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by ingestion and by inhalation of its aerosol. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance may cause effects on the central nervous system , resulting in excitement and convulsions. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the central nervous system and thyroid , resulting in impaired functions and hypothyroidism. PHYSICAL PROPERTIES Boiling point (decomposes): 368°C Melting point: about 300°C Density: 1.7 g/cm3 Solubility in water, g/100 ml at 21°C: 139 ENVIRONMENTAL DATA N O T E S NFPA Code: H3; F0; R1; ADDITIONAL INFORMATION ICSC: 0675 SODIUM THIOCYANATE (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.