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NIOSH

SULFOTEP

ICSC: 0985

Thiodiphosphoric acid tetraethyl ester
Ethyl thiopyrophosphate
Tetraethyl dithiopyrophosphate (TEDP)
C8H20O5P2S2 / (C2H5O)2P(S)OP(S)(OC2H5)2
Molecular mass: 322.30
ICSC # 0985 		CAS # 3689-24-5
RTECS # XN4375000
UN # 1704
EC # 015-027-00-3
October 18, 1999 Validated

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

STORAGE

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.
Dry. Well closed. Separated from strong oxidants, food and feedstuffs . Keep in a well-ventilated room. Do not store in metal containers. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
Do not transport with food and feedstuffs.
Marine pollutant.
T+ symbol
N symbol
R: 27/28-50/53
S: 1/2-23-28-36/37-45-60-61
UN Hazard Class: 6.1
UN Packing Group: II
ICSC: 0985 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

SULFOTEP

ICSC: 0985

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PHYSICAL STATE; APPEARANCE:
PALE YELLOW LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:


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:
OSHA PEL: TWA 0.2 mg/m3 skin
NIOSH REL: TWA 0.2 mg/m3 skin
NIOSH IDLH: 10 mg/m3 See: 89245
TLV: (inhalable fraction & vapour) 0.1 mg/m3 as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2008).
EU OEL: 0.1 mg/m3; (skin); (EU 2000.


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 20°C.

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: 136-139°C
Relative density (water = 1): 1.2
Solubility in water:
none
Vapour pressure, Pa at 20°C: 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.

N O T E S

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 131-132°C 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.
Transport Emergency Card: TEC (R)-61GT2-II
Card has been partially updated in November 2008: see Occupational Exposure Limits,

ADDITIONAL INFORMATION



ICSC: 0985 SULFOTEP
(C) IPCS, CEC, 1994
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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