International Chemical Safety Cards POTASSIUM SULFATE ICSC: 1451 Sulfuric acid dipotassium salt Dipotassium sulfate K2SO4 Molecular mass: 174.3 ICSC #    1451 CAS #     7778-80-5 RTECS # TT5900000 May 06, 2003 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Not combustible. In case of fire in the surroundings: use appropriate extinguishing media. EXPLOSION EXPOSURE  •INHALATION Cough. Sore throat. Local exhaust. Fresh air, rest.  •SKIN Redness. Protective gloves. Rinse and then wash skin with water and soap.  •EYES Redness. Pain. Safety goggles. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Diarrhoea. Nausea. Vomiting. Do not eat, drink, or smoke during work. Give plenty of water to drink. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers. (Extra personal protection: P1 filter respirator for inert particles.) R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1451 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 SULFATE ICSC: 1451 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO WHITE CRYSTALS . PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating producing sulfur oxides . OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, 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 Boiling point: 1689°C Melting point: 1067°C Density: 2.66 g/cm3 Solubility in water, g/100 ml at 25°C: 12 ENVIRONMENTAL DATA N O T E S ADDITIONAL INFORMATION ICSC: 1451 POTASSIUM SULFATE (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.