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DEMETON-METHYL ICSC: 0862
Date of Peer Review: March 2001

S-2-Ethylthioethyl O,O-dimethyl phosphorothioate
CAS # 8022-00-2 C6H15O3PS2
RTECS # TG1760000 Molecular mass: 230.3
UN # 3018
EC # 015-031-00-5
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
PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Convulsions. Dizziness. Laboured breathing. Nausea. Pupillary constriction, muscle cramp, excessive salivation. Sweating. Unconsciousness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
Skin MAY BE ABSORBED! (See Inhalation).
Protective clothing. Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Pupillary constriction. Blurred vision.
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 (See Inhalation). Abdominal cramps. Diarrhoea. Vomiting.
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 PACKAGING & LABELLING
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. (Extra personal protection: P2 filter respirator for harmful particles.) Do NOT let this chemical enter the environment.
Do not transport with food and feedstuffs.
EU Classification
Symbol: T, N
R: 24/25-51/53
S: (1/2-)-28-36/37-45-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61G43b
Keep in a well-ventilated room. Separated from food and feedstuffs.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK


DEMETON-METHYL ICSC: 0862
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO PALE YELLOW OILY LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on burning producing phosphorous oxides and sulfur oxides.

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the central nervous system. Cholinesterase inhibitor. Medical observation is indicated. The effects may be delayed. Exposure may result in death.

PHYSICAL PROPERTIES
Relative density (water = 1): 1.2
Solubility in water, g/100 ml at 20C: 2.2
Vapour pressure, Pa at 20C: 0.04
Octanol/water partition coefficient as log Pow: 1.32
ENVIRONMENTAL DATA
The substance is toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to honey bees, mammals and birds. Avoid release to the environment in circumstances different to normal use.
NOTES
Demeton-methyl is a mixture of Demeton-S-methyl and Demeton-O-methyl. If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s). Carrier solvents used in commercial formulations may change physical and toxicological properties. Also consult ICSC 0429 Demeton-O-methyl, ICSC 0705 Demeton-S-methyl. Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. Depending on the degree of exposure, periodic medical examination is indicated. Metasystox is a trade name.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 1999