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SULFOTEP ICSC: 0985
Date of Peer Review: October 1999

Thiodiphosphoric acid tetraethyl ester
Ethyl thiopyrophosphate
Tetraethyl dithiopyrophosphate (TEDP)
CAS # 3689-24-5 C8H20O5P2S2 / (C2H5O)2P(S)OP(S)(OC2H5)2
RTECS # XN4375000 Molecular mass: 322.30
UN # 1704
EC Index # 015-027-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Water spray, foam, powder, carbon dioxide.
EXPLOSION Container may explode violently in heat of fire.

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Blue skin. Dizziness. Drowsiness. Headache. Pupillary constriction, muscle cramp, excessive salivation. Sweating. Laboured breathing. Nausea. Convulsions. Unconsciousness. Weakness. See Ingestion.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin MAY BE ABSORBED! Redness. Sweating and twitching in the area of absorption. (Further see Inhalation).
Protective gloves. Protective clothing.
Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain. Pupillary constriction.
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 take to a doctor.
Ingestion Abdominal cramps. Confusion. Diarrhoea. Vomiting. Loss of appetite. (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 PACKAGING & LABELLING
Ventilation. Collect leaking liquid in sealable containers. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment.
Do not transport with food and feedstuffs. Marine pollutant.
EU Classification
Symbol: T+, N
R: 27/28-50/53
S: (1/2-)-23-28-36/37-45-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT2-II
Dry. Well closed. Separated from strong oxidants, food and feedstuffs. Keep in a well-ventilated room. Do not store in metal containers.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
SULFOTEP ICSC: 0985
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
PALE YELLOW LIQUID, WITH CHARACTERISTIC ODOUR.

CHEMICAL DANGERS:
The substance decomposes on heating producing highly toxic fumes of phosphorous oxides and sulfur oxides. Reacts with strong oxidants. Attacks iron, some forms of plastic, rubber and coatings.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.2 mg/m as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2004).
MAK: 0.0075 ppm, 0.1 mg/m; Peak limitation category: II(2); skin absorption (H); Pregnancy risk group: C; (DFG 2004).
0.1 mg/m skin EC OELs
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes and the skin. The substance may cause effects on the nervous system, resulting in convulsions, respiratory failure. Cholinesterase inhibitor. Exposure far above the OEL may result in 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.
PHYSICAL PROPERTIES
Boiling point at 0.2666 kPa: 136-139C
Relative density (water = 1): 1.2
Solubility in water: none
Vapour pressure, Pa at 20C: 0.0226
Octanol/water partition coefficient as log Pow: 3.99
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.
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. Technical grade is a dark-coloured liquid, boiling point 131-132C at 0.267 kPa. Do NOT take working clothes home. ASP 47, Bay-E-393, Bladafum, Dithion, Dithiotep, Dithiofos are trade names. Card has been partly updated in October 2004 and 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005