Tetraethyl dithiopyrophosphate

  • TEDP
  • Tetraethyl pyrophsophorodithionate
  • Sulfatep
DescriptionPale-yellow liquid with a garlic-like odor.
UsesInsecticide, acaricide.

Registry Numbers and Inventories.
EC Index Number015-027-00-3
EC ClassVery toxic
RTECS class Agricultural Chemical and Pesticide; Mutagen
UN (DOT)1703
Beilstein Reference4-01-00-01351
EPA OPP 79501
Swiss Giftliste 1G-2862
New ZealandListed

Formula C8H20O5P2S2
Formula mass 322.32
Melting point, C 88
Boiling point, C 319
Vapor pressure, mmHg 0.0007 (25 C)
Density 1.193 g/cm3 (20 C)
Solubility in water 7 mg/L
Refractive index 1.4742 (20 C)
Partition coefficient, pKow 3.99
Heat of vaporization 53.8 kJ/mol

Hazards and Protection.
Storage Keep in well ventilated area.
Handling All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection Wear appropriate protective gloves, clothing and goggles.
Respirators Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability Hydrolyzes very slowly in aqueous solution.
Incompatibilities Incompatible with the following: Strong oxidizers, iron Corrosive to iron.].
Decomposition When heated to decomposition, it emits very toxic fumes of phosphorus oxides and sulfur oxides.

Flash Point,C146
Fire fightingSMALL FIRES: Dry chemical, carbon dioxide or water spray. LARGE FIRES: Dry chemical, carbon dioxide, alcohol-resistant foam or water spray. Move containers from fire area if you can do it without risk. Dike fire control water for later disposal; do not scatter the material. FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire.
Fire potentialMay burn but does not ignite readily.
HazardsWhen heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. May polymerize explosively when heated or involved in a fire. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Combustion productsWhen heated to decompostion, it emits very toxic fumes of oxides of phosphorous and oxides of sulfur.

Exposure limit(s)TLV: ppm; 0.2 mg/m3 (skin) (ACGIH 1991-1992). OSHA PEL: TWA 0.2 mg/m3 skin NIOSH REL: TWA 0.2 mg/m3 skin NIOSH IDLH: 10 mg/m3
Exposure effects Fever, low heart rate and abnormally low blood pressure, or rapid heart rate and elevated blood pressure may occur. Headache, dizziness, muscle spasms and profound weakness are common. Alterations of level of consciousness, anxiety, paralysis, seizures and coma may occur. Seizures may be more common in children.
   IngestionVomiting, hypersalivation, diarrhea, fecal incontinence and abdominal pain may occur.
   InhalationDyspnea, rales, bronchorrhea, bronchospasm, or tachypnea may be noted. Noncardiogenic pulmonary edema may occur in severe cases. Chemical pneumonitis may be seen.
   SkinSweating is a consistent but not universal sign.
   Eyes Constriction of the pupil, tearing, and blurred vision are common. Prolonged dialation of the pupils may occur in severe poisonings. Opsoclonus has been reported in one case. Salivation commonly occurs.

First aid
   IngestionSeek medical assistance.
   InhalationMove victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult. Effects may be delayed.
   Skin Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. In case of contact with liquefied gas, thaw frosted parts with lukewarm water. Effects may be delayed.
   EyesImmediately flush with running water for at least 20 minutes. Effects may be delayed.

UN number1703
Response guide123
Hazard class 6.1
Std. Transport # 4921481 4925292