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ETHIONICSC: 0888
O,O,O',O'-Tetraethyl S,S'-methylene-bis-phosphorodithioate
Diethion
March 1998
CAS #: 563-12-2
UN #: 3018
EC Number: 209-242-3

  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.  Risk of fire and explosion if formulations contain flammable/explosive solvents.  NO open flames.    Use water spray, alcohol-resistant foam, powder, carbon dioxide.   

 PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS PREVENTION FIRST AID
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Convulsions. Unconsciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! See Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention . 
Eyes   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 Vomiting. Abdominal cramps. Diarrhoea. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. 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. Do NOT wash away into sewer. 

According to UN GHS Criteria

 

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

STORAGE
Separated from food and feedstuffs. Well closed. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 
PACKAGING
Do not transport with food and feedstuffs.
Severe marine pollutant. 
ETHION ICSC: 0888
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID. 

Physical dangers
 

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

Formula: C9H22O4P2S4
Molecular mass: 384.5
Melting point: -12 - -13°C
Relative density (water = 1): 1.2
Solubility in water, g/100ml at 20°C: 0.0001
Vapour pressure, Pa at 25°C: 0.0002
Octanol/water partition coefficient as log Pow: 5.073  


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 convulsions and respiratory failure. Cholinesterase inhibition. Exposure could cause unconsciousness and death. The effects may be delayed. Medical observation is indicated. 

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
Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.05 mg/m3, as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued 

ENVIRONMENT
The substance is very toxic to aquatic organisms. Avoid release to the environment in circumstances different to normal use. 

NOTES
Depending on the degree of exposure, periodic medical examination is suggested.
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.
Do NOT take working clothes home. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 21-25-50/53; S: (1/2)-25-36/37-45-60-61 

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    See Also:
       Toxicological Abbreviations
       Ethion (FAO/PL:1968/M/9/1)
       Ethion (FAO/PL:1969/M/17/1)
       Ethion (AGP:1970/M/12/1)
       Ethion (WHO Pesticide Residues Series 2)
       Ethion (WHO Pesticide Residues Series 5)
       Ethion (Pesticide residues in food: 1982 evaluations)
       Ethion (Pesticide residues in food: 1983 evaluations)
       Ethion (Pesticide residues in food: 1986 evaluations Part II Toxicology)
       Ethion (Pesticide residues in food: 1990 evaluations Toxicology)