Tetraethyl dithiopyrophosphate

  • TEDP
  • Tetraethyl pyrophsophorodithionate
  • Sulfatep
Formula
C8H20O5P2S2
Structure
Description
Pale-yellow liquid with a garlic-like odor.
Uses
Insecticide, acaricide.

Registry Numbers and Inventories.
CAS
3689-24-5
EC (EINECS/ELINCS)
222-995-2
EC Index Number
015-027-00-3
EC Class
Very toxic
RTECS
XN4375000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
UN (DOT)
1703
Merck
12,9139
Beilstein/Gmelin
1714019
Beilstein Reference
4-01-00-01351
RCRA
P109
EPA OPP
79501
Swiss Giftliste 1
G-2862
New Zealand
Listed

Properties.
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.

Fire.
Flash Point,°C
146
Fire fighting
SMALL 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 potential
May burn but does not ignite readily.
Hazards
When 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 products
When heated to decompostion, it emits very toxic fumes of oxides of phosphorous and oxides of sulfur.

Health.
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
Poison_Class
1
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.
   Ingestion
Vomiting, hypersalivation, diarrhea, fecal incontinence and abdominal pain may occur.
   Inhalation
Dyspnea, rales, bronchorrhea, bronchospasm, or tachypnea may be noted. Noncardiogenic pulmonary edema may occur in severe cases. Chemical pneumonitis may be seen.
   Skin
Sweating 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
 
   Ingestion
Seek medical assistance.
   Inhalation
Move 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.
   Eyes
Immediately flush with running water for at least 20 minutes. Effects may be delayed.

Transport.
UN number
1703
Response guide
Hazard class
6.1
PRTC
T
USCG CHRIS Code
TED
 
Std. Transport #
4921481 4925292