POTASSIUM HYDROGEN SULFATE ICSC: 1585 Potassium acid sulfate Sulfuric acid monopotassium salt Monopotassium sulfate Potassium bisulfate KHSO4 Molecular mass: 136.2 ICSC #    1585 CAS #     7646-93-7 RTECS # TS7200000 UN #        2509 EC #         016-056-00-4 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! AVOID ALL CONTACT!  •Inhalation Cough Sore throat. Local exhaust or breathing protection. Fresh air, rest.  •Skin Redness. Pain. Skin burns. Protective gloves. Protective clothing. First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.  •Eyes Redness. Pain. Severe deep burns. Face shield 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 Sore throat. Abdominal pain. Burning sensation. Shock or collapse. Do not eat, drink, or smoke during work. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention. Spillage Disposal Storage Packaging & Labelling Personal protection: P3 filter respirator for toxic particles. Chemical protection suit. Sweep spilled substance into containers. Moisten the remainder. Dry. Separated from strong bases, alcohols , metals , food and feedstuffs . Unbreakable packaging; put breakable packaging into closed unbreakable container. C symbol R: 34-37 S: 1/2-26-36/37/39-45 UN Hazard Class: 8 UN Packing Group: II POTASSIUM HYDROGEN SULFATE ICSC: 1585 Important Data Physical State; Appearance: COLOURLESS TO WHITE HYGROSCOPIC CRYSTALS OR CRYSTALLINE POWDER. Physical Dangers: Chemical Dangers: The substance decomposes on heating producing toxic fumes . Reacts with alcohols and water . The solution in water is a medium strong acid. Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). Occupational Exposure Limits: TLV not established. MAK not established. Routes of Exposure: Inhalation Risk: A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered. Effects of Short-Term Exposure: The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Effects of Long-Term or Repeated Exposure: Physical Properties Melting point (decomposes): 195-214°C Density: 2.2 g/cm3 Solubility in water, g/100 ml: 49 (very good) Environmental Data N O T E S Transport Emergency Card: TEC (R)-80GC2-II+III ADDITIONAL INFORMATION ICSC: 1585 POTASSIUM HYDROGEN 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.