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THIOMETON
ICSC: 0580
Peer-Review Status: 04.08.1997 Validated
S-2-Ethylthioethyl O,O-dimethyl phosphorodithioate
Phosphorodithioic acid, S-(2-(ethylthio)ethyl)O,O-dimethyl ester
Dithiomethon 
CAS #: 640-15-3 RTECS #: TE4375000
UN #: 3018
EC #: 015-050-00-9
EINECS #: 211-362-6
    Formula: C6H15O2PS3 / (CH3O)2P(S)SCH2CH2SCH2CH3
Molecular mass: 246.3

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.  Use water spray, powder, foam, carbon dioxide. 
EXPLOSION Risk of fire and explosion if formulations contain flammable/explosive solvents.     
 
EXPOSURE   PREVENT GENERATION OF MISTS! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Dizziness. Sweating. Laboured breathing. Nausea. Pupillary constriction, muscle cramp, excessive salivation.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin MAY BE ABSORBED! Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes   Wear safety spectacles 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 Abdominal cramps. Vomiting. Diarrhoea. Weakness. Muscle twitching. Convulsions. Unconsciousness. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Rest. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT wash away into sewer. 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.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: T; R: 21-25; S: (1/2)-36/37-45 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61G43C.  Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS OILY LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on burning. This produces toxic fumes including phosphorus oxides and sulfur oxides. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

Inhalation risk
Evaporation at 20°C 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 nervous system. 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. Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at O.013kPa: 110°C
Relative density (water = 1): 1.2
Solubility in water, g/100ml at 25°C: 0.02
Vapour pressure, Pa at 20°C: 0.02
Relative vapour density (air = 1): 8.5
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Octanol/water partition coefficient as log Pow: 0.51  
The substance is toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to bees. Avoid release to the environment in circumstances different to normal use. 

NOTES
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.
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.
Ekatin, Medrin, Unimeton are trade names. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       Thiometon (FAO/PL:1969/M/17/1)
       Thiometon (WHO Pesticide Residues Series 3)
       Thiometon (Pesticide residues in food: 1976 evaluations)
       Thiometon (Pesticide residues in food: 1979 evaluations)