International Chemical Safety Cards POTASSIUM FERRICYANIDE ICSC: 1132 Tripotassium hexacyanoferrate (-3) Potassium cyanoferrate Potassium ferricyanate Iron potassium cyanide C6FeK3N6 / K3Fe(CN)6 Molecular mass: 329.25 ICSC #    1132 CAS #     13746-66-2 RTECS # LJ8225000 October 08, 2002 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  •INHALATION Cough. Sore throat. Avoid inhalation of dust . Fresh air, rest.  •SKIN Redness. Pain. Protective gloves. Remove contaminated clothes. Rinse skin with plenty of water or shower.  •EYES Redness. Pain. Safety spectacles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Nausea. Vomiting. Do not eat, drink, or smoke during work. Rinse mouth. Give plenty of water to drink. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. (Extra personal protection: P2 filter respirator for harmful particles.) Separated from acids. Dry. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1132 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 POTASSIUM FERRICYANIDE ICSC: 1132 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: RED CRYSTALLINE POWDER PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing toxic gases including hydrogen cyanide . Reacts with acids , to produce cyanides, causing toxic hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. INHALATION RISK: A nuisance-causing concentration of airborne particles can be reached quickly when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: The substance is mildly irritating to the eyes , the skin and the respiratory tract . EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Density: 1.89 g/cm3 Solubility in water, g/100 ml: 46 ENVIRONMENTAL DATA This substance may be hazardous in the environment; special attention should be given to aquatic organisms. N O T E S Temperature of decomposition unknown in literature. Health effects of exposure to the substance have not been investigated adequately. ADDITIONAL INFORMATION ICSC: 1132 POTASSIUM FERRICYANIDE (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.