Diethion
O,O,O',O'-Tetraethyl S,S'-methylene-bis-phosphorodithioate
C9H22O4P2S4
Molecular mass: 384.5
ICSC # 0888
CAS # 563-12-2
RTECS # TE4550000
UN # 3018
EC # 015-047-00-2
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
Liquid formulations containing organic solvents may be flammable.
Gives off irritating or toxic fumes (or gases) in a fire.
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NO open flames.
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Water spray,
alcohol-resistant foam,
powder, carbon dioxide.
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Explosion
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Risk of fire and explosion if formulations contain flammable/explosive solvents.
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Exposure
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PREVENT GENERATION OF MISTS!
STRICT HYGIENE!
AVOID Exposure OF ADOLESCENTS AND CHILDREN!
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IN ALL CASES CONSULT A DOCTOR!
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•Inhalation
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Pupillary constriction, muscle cramp, excessive salivation.
Sweating.
Nausea.
Dizziness.
Laboured breathing.
Convulsions.
Unconsciousness.
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Ventilation, local exhaust, or breathing protection.
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Fresh air, rest.
Artificial respiration may be needed.
Refer for medical attention.
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•Skin
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MAY BE ABSORBED!
(See Inhalation).
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Protective gloves.
Protective clothing.
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Remove contaminated clothes.
Rinse and then wash skin with water and soap.
Refer for medical attention.
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•Eyes
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Face shield,
or eye protection in combination with breathing protection.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Vomiting.
Abdominal cramps.
Diarrhoea.
(Further see Inhalation).
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Induce vomiting (ONLY IN CONSCIOUS PERSONS!).
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Collect leaking and spilled liquid in sealable containers as far as possible.
Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Do NOT wash away into sewer.
Do NOT let this chemical enter the environment.
Personal protection: complete protective clothing including self-contained breathing apparatus.
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Separated from
food and feedstuffs
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Well closed.
Store in an area without drain or sewer access.
Provision to contain effluent from fire extinguishing.
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Do not transport with food and feedstuffs.
Severe
marine pollutant.
T symbol
N symbol
R: 21-25-50/53
S: 1/2-25-36/37-45-60-61
UN Hazard Class: 6.1
UN Packing Group: II
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Important Data
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Physical State; Appearance:
COLOURLESS LIQUID.
Physical Dangers:
Chemical Dangers:
The substance decomposes
on heating or
on burning
producing
toxic and corrosive fumes
including
phosphorus oxides
and
sulfur oxides
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Occupational Exposure Limits:
TLV: (inhalable fraction & vapour) 0.05 mg/m3 as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued (ACGIH 2008).
MAK not established.
OSHA PEL: none
NIOSH REL: 0.4 mg/m3 skin
NIOSH IDLH: N.D. See: IDLH INDEX
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation of its aerosol,
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
, resulting in
convulsions
,
respiratory failure
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Cholinesterase inhibitor.
Exposure may result in unconsciousness and death.
The effects may be delayed.
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms.
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Physical
Properties
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Melting point: -12/-13°C
Relative density (water = 1): 1.2
Solubility in water, g/100 ml at 20°C: 0.0001
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Vapour pressure, Pa at 25°C: 0.0002
Octanol/water partition coefficient as log Pow: 5.073
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Environmental
Data
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The substance is very toxic to aquatic organisms.
Avoid release to the environment in circumstances different to normal use.
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N O T E S
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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.
Nialate, Niagara 1240, Rhodocide and Vegfru fosmite are trade names.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-61GT6-II
Card has been partially updated in November 2008: see Occupational Exposure Limits, Storage.
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ADDITIONAL INFORMATION
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ICSC: 0888
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ETHION
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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