International Chemical Safety Cards SODIUM TETRAHYDROBORATE ICSC: 1670 Sodium borohydride NaBH4 Molecular mass: 37.8 ICSC #    1670 CAS #     16940-66-2 RTECS # ED3325000 UN #        1426 October 12, 2006 Validated TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. NO open flames. Dry sand . Dry powder. NO water . NO foam. NO carbon dioxide. EXPLOSION Risk of fire and explosion on contact with acid(s) , alcohol , oxidants , water . EXPOSURE AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!  •INHALATION Burning sensation. Cough. Sore throat. Laboured breathing. Shortness of breath. Local exhaust or breathing protection. Fresh air, rest. Refer immediately for medical attention.  •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. Safety goggles or eye protection in combination with breathing protection. Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.  •INGESTION Burning sensation in the throat and chest. Abdominal pain. Vomiting. Shock or collapse. Do not eat, drink, or smoke during work. Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer immediately for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Remove all ignition sources. Personal protection: P3 filter respirator for toxic particles. Chemical protection suit. Sweep spilled substance into dry, plastic containers. Carefully collect remainder, then remove to safe place. Dry. Well closed. Separated from strong acids, alcohols , powdered metals and water . UN Hazard Class: 4.3 UN Packing Group: I Signal: Danger Flame-Corr-Skull In contact with water releases flammable gases which may ignite spontaneously Toxic if swallowed Causes severe skin burns and eye damage SEE IMPORTANT INFORMATION ON BACK ICSC: 1670 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 TETRAHYDROBORATE ICSC: 1670 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: WHITE CRYSTALLINE POWDER . PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating and on contact with acids , powdered metals , water or moisture , forming flammable/explosive gas (hydrogen - see ICSC0001) . The substance is a strong reducing agent and reacts violently with oxidants, causing fire and explosion hazard. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: Serious local effects by all routes of exposure. INHALATION RISK: A harmful concentration of airborne particles can be reached quickly when dispersed. 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 Decomposes at temperature > 250 °C Density: 1.07 g/cm³ Solubility in water, g/100 ml at 25°C: 55 Auto-ignition temperature: about 220°C Explosive limits, vol% in air: 3.02 - ? ENVIRONMENTAL DATA N O T E S Reacts violently with fire extinguishing agents such as water. Transport Emergency Card: TEC (R)-43GW2-I ADDITIONAL INFORMATION ICSC: 1670 SODIUM TETRAHYDROBORATE (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.