International Chemical Safety Cards DICHLORVOS ICSC: 0690 DICHLORVOS 2,2-Dichlorovinyl dimethyl phosphate Phosphoric acid, 2,2-dichloroethenyl dimethyl ester DDVP C4H7Cl2O4P / CCl2=CHOPO(OCH3)2 Molecular mass: 220.98 CAS # 62-73-7 RTECS # TC0350000 ICSC # 0690 UN # 3018 EC # 015-019-00-X TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION EXPOSURE STRICT HYGIENE! AVOID EXPOSURE OF (PREGNANT) WOMEN! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN! IN ALL CASES CONSULT A DOCTOR! INHALATION Convulsions. Dizziness. Sweating. Laboured breathing. Nausea. Unconsciousness. Pupillary constriction, muscle cramp, excessive salivation. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Artificial respiration if indicated. Refer for medical attention. SKIN MAY BE ABSORBED! Redness. Pain (further see Inhalation). Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention. EYES Face shield, 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 Abdominal cramps. Diarrhoea Vomiting (further see Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT let this chemical enter the environment (extra personal protection: chemical protection suit including self-contained breathing apparatus). Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. See Chemical Dangers. Well closed. Keep in a well-ventilated room. Do not transport with food and feedstuffs. T symbol R: 24/25 S: (1/2-)23-36/37-45 UN Hazard Class: 6.1 Severe marine pollutant. SEE IMPORTANT INFORMATION ON BACK ICSC: 0690 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993 No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and IDLH values.

International Chemical Safety Cards DICHLORVOS ICSC: 0690 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS TO AMBER LIQUID , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic fumes including phosphorous oxides, phosgene and chlorine fumes. Attacks metal, plastic and rubber. OCCUPATIONAL EXPOSURE LIMITS (OELs): TLV (as TWA): 0.1 ppm; 0.90 mg/m3 A4, (Skin) (ACGIH 1997). OSHA PEL: TWA 1 mg/m3 skin NIOSH REL: TWA 1 mg/m3 skin NIOSH IDLH: 100 mg/m3 ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster. EFFECTS OF SHORT-TERM EXPOSURE: The substance irritates the skin. The substance may cause effects on the central nervous system. Cholinesterase inhibitor. Exposure above the OEL may result in death. The effects may be delayed. Medical observation is indicated. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged contact may cause skin sensitization. Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms. This substance is possibly carcinogenic to humans. PHYSICAL PROPERTIES Boiling point at 2.7 kPa: 140°C Relative density (water = 1): 1.4 Solubility in water: moderate Vapour pressure, Pa at 20°C: 1.6 Flash point: >80°C Octanol/water partition coefficient as log Pow: 1.47 ENVIRONMENTAL DATA The substance is very toxic to aquatic organisms. N O T E S Depending on the degree of exposure, periodic medical examination is indicated. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. Carrier solvents used in commercial formulations may change physical and toxicological properties. Do NOT take working clothes home. Do NOT use in the vicinity of a fire or a hot surface, or during welding. Dedevap, Nogas, Nuvan,,Phosvit, Vapona, Bay19149 are trade names. Also consult publication Environmental Health Criteria No. 79, Health Safety Guide No. 18. Transport Emergency Card: TEC (R)-61G43b ADDITIONAL INFORMATION ICSC: 0690 DICHLORVOS © IPCS, CEC, 1993

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 IDLH values.