Dioxathion

  • S,S'-(1,4-Dioxane-2,3-diyl) O,O,O',O'-tetraethyl-bis-(phosphorodithioate)
  • p-Dioxane-2,3-diyl ethyl phosphorodithioate
Formula
C12H26O6P2S4
Structure
Description
Tan liquid (technical grade is brown).
Uses
Insecticide, acaricide.

Registry Numbers and Inventories.
CAS
78-34-2
EC (EINECS/ELINCS)
201-107-7
EC Index Number
015-063-00-X
EC Class
Very toxic; Toxic
RTECS
TE3350000
RTECS class
Agricultural Chemical and Pesticide; Tumorigen; Mutagen; Human Data
UN (DOT)
3018
Merck
12,3355
Beilstein/Gmelin
96128
Beilstein Reference
5-19-03-00142
EPA OPP
37801
Swiss Giftliste 1
G-1582

Properties.
Formula
C12H26O6P2S4
Formula mass
456.55
Melting point, °C
-20.0
Boiling point, °C
502
Vapor pressure, mmHg
1E-9 (25 C)
Density
1.257 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
117 cp @ 25C
Refractive index
1.542 (20 C)
Partition coefficient, pKow
4.96
Heat of vaporization
74.4 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
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
(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site. Do not touch spilled material; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Large spills: dike far ahead of spill for later disposal.
Stability
Stable in water at neutral ph, but hydrolysed by alkali or on heating. Unstable to iron or tin surfaces or when mixed with certain carriers.
Incompatibilities
May react with iron or tin surfaces.

Fire.
Flash Point,°C
258
Fire fighting
(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Remove and isolate contaminated clothing at the site. Move container from fire area if you can do so without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog or foam.
Fire potential
Non-flammable
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure limit(s)
TLV: ppm; 0.2 mg/m3 (as TWA) (skin) (ACGIH 1997). NIOSH REL: TWA 0.2 mg/m3 skin
Poison_Class
2
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
Nausea, vomiting, diarrhea, fecal incontinence and abdominal pain may occur.
   Inhalation
Dyspnea, rales, bronchorrhea, or tachypnea may be noted. Pulmonary edema may occur in severe cases.
   Skin
Sweating is a consistent but not universal sign.
   Eyes
See Skin.

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.
   Skin
Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.
   Eyes
Immediately flush with running water for at least 20 minutes.

Transport.
UN number
3018
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
DXT