International Chemical Safety Cards BENZENE ARSONIC ACID ICSC: 0223 Phenylarsonic acid C6H7AsO3 / C6H5AsO(OH)2 Molecular mass: 202.05 ICSC #    0223 CAS #     98-05-5 RTECS # CY3150000 UN #        3465 EC #         033-002-00-5 March 13, 1995 Validated 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! IN ALL CASES CONSULT A DOCTOR!  •INHALATION Abdominal pain. Confusion. Diarrhoea. Dizziness. Drowsiness. Headache. Vomiting. Loss of muscular coordination. Paralysis. Symptoms may be delayed (see Notes). Closed system and ventilation. Fresh air, rest. Refer for medical attention.  •SKIN Skin disorders. (Further see Inhalation). Protective gloves. Protective clothing. Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.  •EYES Safety goggles 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 Difficulty in swallowing. Abdominal pain. Confusion. Diarrhoea. Dizziness. Dullness. Headache. Vomiting. Loss of muscular coordination. Paralysis. (Further see Inhalation). Do not eat, drink, or smoke during work. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into sealable containers. Do NOT wash away into sewer. Carefully collect remainder, then remove to safe place. Separated from food and feedstuffs . Dry. Ventilation along the floor. Airtight. Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs. Marine pollutant. Note: A T symbol N symbol R: 23/25-50/53 S: 1/2-20/21-28-45-60-61 UN Hazard Class: 6.1 SEE IMPORTANT INFORMATION ON BACK ICSC: 0223 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 BENZENE ARSONIC ACID ICSC: 0223 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS SOLID IN VARIOUS FORMS. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on heating or producing toxic fumes including arsenic (see ICSC 0013). OCCUPATIONAL EXPOSURE LIMITS: TLV not established. MAK not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation and by ingestion. 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: See Notes. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: PHYSICAL PROPERTIES Melting point (decomposes): 160°C Relative density (water = 1): 1.76 Solubility in water: poor ENVIRONMENTAL DATA N O T E S Depending on the degree of exposure, periodic medical examination is suggested. The symptoms of systemic arsenic poisoning do not become manifest until hours after the exposure. Card has been partly updated in October 2005. See sections EU classification, Emergency Response. Transport Emergency Card: TEC (R)-61GT5-II ADDITIONAL INFORMATION ICSC: 0223 BENZENE ARSONIC 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.