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DEMETON (MIXED ISOMERS)ICSC: 0861
September 2002
CAS #: 8065-48-3
UN #: 3018

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

 PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Convulsions. Dizziness. Laboured breathing. Nausea. Vomiting. Pupillary constriction, muscle cramp, excessive salivation. Sweating. Unconsciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Further see Inhalation.  Protective clothing. Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes MAY BE ABSORBED! Redness. Pain.  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 Abdominal cramps. Diarrhoea. Vomiting. See Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Give a slurry of activated charcoal in water to drink. See Notes. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & 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. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Subsidiary Risks: 3; UN Pack Group: I 

STORAGE
Separated from strong oxidants and food and feedstuffs. Keep in a well-ventilated room. 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 (MIXED ISOMERS) ICSC: 0861
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
 

Chemical dangers
Decomposes on burning. This produces toxic fumes including phosphorus oxides and sulfur oxides. Reacts violently with strong oxidants. Attacks plastics. 

Formula: (C2H5O)2PS.OCH2CH2SC2H5 and (C2H5O)2PO.SCH2CH2SC2H5
Molecular mass: 258.34
Boiling point at 0.27kPa: 134°C
Relative density (water = 1): 1.1
Solubility in water: poor
Vapour pressure, Pa at 20°C: <10
Auto-ignition temperature: 464°C  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance may cause effects on the nervous system. This may result in cardiac disorders, convulsions, cyanosis and respiratory failure. Cholinesterase inhibition. Exposure could cause death. Medical observation is indicated. The effects may be delayed. 

Inhalation risk
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster. 

Effects of long-term or repeated exposure
Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.05 mg/m3, as TWA; (skin); BEI issued.
MAK: skin absorption (H) 

ENVIRONMENT
The substance is very toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to birds, bees and mammals. 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
This substance is a mixture of two isomers: Demeton-O and Demeton-S (see ICSC 0864).
Do NOT take working clothes home.
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 suggested.
Carrier solvents used in commercial formulations may change physical and toxicological properties. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T+, N; R: 27/28-50; S: (1/2)-28-36/37-45-61 

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       Toxicological Abbreviations