International Chemical Safety Cards SODIUM TETRABORATE ICSC: 1229 Sodium biborate Sodium pyroborate Boron sodium oxide Fused borax Na2B4O7 Molecular mass: 201.3 ICSC #    1229 CAS #     1330-43-4 RTECS # ED4588000 October 24, 1995 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: all extinguishing agents allowed. EXPLOSION EXPOSURE PREVENT DISPERSION OF DUST!  •INHALATION Cough. Shortness of breath. Sore throat. Nose bleed. Local exhaust or breathing protection. Fresh air, rest.  •SKIN Dry skin. Redness. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap.  •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. Diarrhoea. Nausea. Vomiting. Weakness. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place. (Extra personal protection: P2 filter respirator for harmful particles). Separated from strong oxidants. Dry. Well closed. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 1229 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 TETRABORATE ICSC: 1229 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS, HYGROSCOPIC, WHITE POWDER OR GLASS-LIKE PLATE. TURNS OPAQUE ON EXPOSURE TO AIR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating or on burning producing toxic fumes including sodium oxide. Reacts with strong oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV: 1 mg/m3 (as TWA) (ACGIH 1994-1995). OSHA PEL: none NIOSH REL: TWA 1 mg/m3 NIOSH IDLH: No data ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol, by ingestion and through damaged skin. INHALATION RISK: Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system, kidneys and gastrointestinal tract by ingestion at high dose or through damaged skin. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the respiratory tract. PHYSICAL PROPERTIES Boiling point (decomposes): 1575°C Melting point: 741°C Relative density (water = 1): 2.367 Solubility in water, g/100 ml at 20°C: 2.56 ENVIRONMENTAL DATA N O T E S Rasorite 65 is a trade name. ADDITIONAL INFORMATION ICSC: 1229 SODIUM TETRABORATE (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.