International Chemical Safety Cards DECABORANE ICSC: 0712 Boron hydride Decaboron tetradecahydride B10H14 Molecular mass: 122.2 ICSC #    0712 CAS #     17702-41-9 RTECS # HD1400000 UN #        1868 October 10, 1997 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. NO contact with halogenated compounds, oxidizers. Special powder, dry sand, NO other agents. EXPLOSION Above 80°C explosive vapour/air mixtures may be formed. Finely dispersed particles form explosive mixtures in air. Above 80°C use a closed system, ventilation, and explosion-proof electrical equipment. In case of fire: cool cylinder by spraying with water but avoid contact of the substance with water. EXPOSURE PREVENT DISPERSION OF DUST! STRICT HYGIENE!  •INHALATION Cough. Dizziness. Drowsiness. Headache. Sweating. Nausea. Sore throat. Weakness. Tremors. Incoordination. Symptoms may be delayed (see Notes). Ventilation (not if powder), local exhaust, or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN MAY BE ABSORBED! Redness. (See Inhalation). Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.  •EYES Redness. Face shield. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION (See Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. (Extra personal protection: complete protective clothing including self-contained breathing apparatus). Fireproof. Separated from food and feedstuffs , halogens , and other oxidants. Cool. Dry. Do not transport with food and feedstuffs. R: S: UN Hazard Class: 4.1 UN Subsidiary Risks: 6.1 UN Packing Group: II SEE IMPORTANT INFORMATION ON BACK ICSC: 0712 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 DECABORANE ICSC: 0712 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO WHITE CRYSTALS , WITH PUNGENT ODOUR. PHYSICAL DANGERS: Dust explosion possible if in powder or granular form, mixed with air. CHEMICAL DANGERS: May explode on heating or contact with flames. The substance decomposes slowly on heating to 300°C to form boron and the flammable gas, hydrogen - see ICSC 0001, and on burning producing toxic fumes (boron oxides). Reacts slowly with halogenated materials and ethers to form impact-sensitive materials. Undergoes explosive reaction with oxidants. Reacts with water or moisture to form flammable gas (hydrogen - see ICSC 0001). Attacks natural rubber, some synthetic rubbers, some greases and some lubricants. OCCUPATIONAL EXPOSURE LIMITS: TLV: 0.05 ppm; 0.25 mg/m3 (as TWA); 0.15 ppm; 0.75 mg/m3 (as STEL) (skin) (ACGIH 1997). OSHA PEL: TWA 0.3 mg/m3 (0.05 ppm) skin NIOSH REL: TWA 0.3 mg/m3 (0.05 ppm) ST 0.9 mg/m3 (0.15 ppm) skin NIOSH IDLH: 15 mg/m3 ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. INHALATION RISK: A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. EFFECTS OF SHORT-TERM EXPOSURE: The aerosol irritates the eyes the skin and the respiratory tract. The substance may cause effects on the central nervous system , resulting in fatigue, hyperexcitability and narcosis. The effects may be delayed. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: The substance may have effects on the central nervous system , resulting in fatigue, inability to concentrate and lack of coordination. PHYSICAL PROPERTIES Boiling point: 213°C Melting point: 99.6°C Relative density (water = 1): 0.9 Solubility in water: Slightly soluble in cold water; hydrolyses in hot water Vapour pressure, Pa at 25°C: 6.65 Relative vapour density (air = 1): 4.2 (at boiling point) Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00 Flash point: 80°C c.c. Auto-ignition temperature: 149°C Explosive limits, vol% in air: see Notes ENVIRONMENTAL DATA N O T E S The onset of symtoms is frequently delayed for 24 to 48 hours after exposure. Explosive limits are unknown in literature. Reacts violently with fire extinguishing agents such as halons. The odour warning when the exposure limit value is exceeded is insufficient. Do NOT take working clothes home. NFPA Code: H3; F2; R1; ADDITIONAL INFORMATION ICSC: 0712 DECABORANE (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.