IPCS INCHEM Home
DEMETON-S
ICSC: 0864
Peer-Review Status: 04.04.2006 Validated
O,O-Diethyl S-2-ethylthioethyl phosphorothioate
Demethonthiol 
CAS #: 126-75-0 RTECS #: TF3130000
UN #: 3018
EC #: 015-029-00-4
EINECS #: 204-801-8
    Formula: C8H19O3PS2
Molecular mass: 258.3

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 foam, powder, carbon dioxide. 
EXPLOSION      
 
EXPOSURE   PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Dizziness. Nausea. Vomiting. Pupillary constriction, muscle cramp, excessive salivation. Laboured breathing. Convulsions. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. See Notes. 
Skin MAY BE ABSORBED! Muscle twitching. Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes Redness. Redness. Pain.  Wear face shield.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal cramps. Diarrhoea. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Give a slurry of activated charcoal in water to drink. Rest. Refer for medical attention . See Notes. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. 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: 27/28; S: (1/2)-28-36/37-45 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 
GHS Classification
Signal: Danger
Fatal if swallowed
Causes damage to nervous system 
skull;toxiccancer;health haz

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61 GT6-I.  Separated from food and feedstuffs. Dry. Keep in a well-ventilated room. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS OILY LIQUID. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive 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 of its aerosol, through the skin and by ingestion. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of short-term exposure
The substance may cause effects on the central nervous system. This may result in convulsions and respiratory depression. Cholinesterase inhibition. Exposure could cause death. The effects may be delayed. Medical observation is indicated. See Notes. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 0.1kPa: 128°C
Relative density (water = 1): 1.13
Solubility in water, g/100ml at 20°C: 0.2
Vapour pressure, Pa at 20°C: 0.035
Relative vapour density (air = 1): 8.92  
This substance may be hazardous to the environment. Special attention should be given to fish and bees. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

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.
Carrier solvents used in commercial formulations may change physical and toxicological properties.
Do NOT take working clothes home.
Card has been partially updated in March 2008: see Occupational Exposure Limits, Storage. 

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