International Chemical Safety Cards BORIC ACID ICSC: 0991 Boracic acid Orthoboric acid H3BO3 Molecular mass: 61.8 ICSC #    0991 CAS #     10043-35-3 RTECS # ED4550000 October 26, 1994 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. Sore throat. Local exhaust or breathing protection. Fresh air, rest.  •SKIN MAY BE ABSORBED! Redness. May be absorbed through injured skin. Protective gloves. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.  •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. Convulsions. Diarrhoea. Nausea. Vomiting. Skin rash. Do not eat, drink, or smoke during work. Rinse mouth. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water (extra personal protection: P2 filter respirator for harmful particles). Separated from strong bases. R: S: SEE IMPORTANT INFORMATION ON BACK ICSC: 0991 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 BORIC ACID ICSC: 0991 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: ODOURLESS, COLOURLESS CRYSTALS OR WHITE POWDER. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating above 100°C producing water and irritant boric anhydride. The solution in water is a weak acid. Incompatible with alkali carbonates and hydroxides. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. INHALATION RISK: Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the gastrointestinal tract, liver and kidneys. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Animal tests show that this substance possibly causes toxic effects upon human reproduction. PHYSICAL PROPERTIES Melting point (decomposes): 171°C Relative density (water = 1): 1.4 Solubility in water, g/100 ml: 5.6 Vapour pressure, kPa at 20°C: negligible ENVIRONMENTAL DATA N O T E S Borofax is a trade name. ADDITIONAL INFORMATION ICSC: 0991 BORIC ACID (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.