IPCS INCHEM Home
DEMETON-METHYLICSC: 0862
November 2001
CAS #: 8022-00-2S-2-Ethylthioethyl O,O-dimethyl phosphorothioate
S (and O)-2-Ethylthioethyl O,O-dimethyl phosphorothioate
UN #: 3018
EINECS #: 213-052-6

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.    NO open flames.    Use water spray, powder, foam, carbon dioxide.   

 PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Convulsions. Dizziness. Laboured breathing. Nausea. Pupillary constriction, muscle cramp, excessive salivation. Sweating. Unconsciousness.  Use 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.  Wear 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 refer for medical attention. 
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 CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Keep in a well-ventilated room. Separated from food and feedstuffs. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Do not transport with food and feedstuffs. 
DEMETON-METHYL ICSC: 0862
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-PALE YELLOW OILY LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on burning. This produces phosphorous oxides and sulfur oxides. 

Formula: C6H15O3PS2
Molecular mass: 230.3
Relative density (water = 1): 1.2
Solubility in water, g/100ml at 20°C: 2.2
Vapour pressure, Pa at 20°C: 0.04
Octanol/water partition coefficient as log Pow: 1.32  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 

Effects of short-term exposure
The substance may cause effects on the central nervous system. Cholinesterase inhibition. Medical observation is indicated. The effects may be delayed. Exposure could cause death. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
TLV: 0.05 mg/m3, ppm, as TWA; (skin); BEI issued.
MAK: 4.8 mg/m3, 0.5 ppm; peak limitation category: II(2); skin absorption (H) 

ENVIRONMENT
The substance is toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to 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. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 24/25-51/53; S: (1/2)-28-36/37-45-61 

All rights reserved. The published material is being distributed without warranty of any kind, either expressed or implied. Neither ILO nor WHO nor the European Commission shall be responsible for the interpretation and use of the information contained in this material.
    See Also:
       Toxicological Abbreviations