Disulfoton

  • Phosphorodithioc acid, o,o-diethyl[2-(ethylthio)ethyl]ester
  • Thiodemeton
  • Dithiodemeton
Formula
C8H19O2PS3
Structure
Description
Disulfoton mixture, dry is a dark yellow oily liquid with a characteristic sulfur odor, absorbed on a dry carrier.
Uses
Insecticide for mites & aphids on small grains, corn & sorghum, cotton, other field crops, vegetables, fruit & nuts, ornamentals.

Registry Numbers and Inventories.
CAS
298-04-4
EC (EINECS/ELINCS)
206-054-3
EC Index Number
015-060-00-3
EC Class
Very toxic; Dangerous for the Environment
RTECS
TD9275000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Human Data
UN (DOT)
2783
Merck
12,3429
Beilstein/Gmelin
1709167
Beilstein Reference
4-01-00-02463
RCRA
P039
EPA OPP
32501
Swiss Giftliste 1
G-1596
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C8H19O2PS3
Formula mass
274.41
Melting point, °C
110 - 112
Boiling point, °C
331
Vapor pressure, mmHg
0.00018 (25 C)
Density
1.1446 g/cm3 (20 C)
Solubility in water
30 mg/L
Refractive index
1.5088 (20 C)
Partition coefficient, pKow
4.02
Heat of vaporization
55.1 kJ/mol

Hazards and Protection.
Storage
Tightly closed containers. Keep away from heat and water.
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
Must wear a respirator with an activated-carbon gas filter cartridge affording protection for a determined number of working hours.
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Cover solids with a plastic sheet to prevent dissolving in rain or fire fighting water. Water spill: Use natural deep water pockets, excavated lagoons, or sand bag barriers to trap material at bottom. If dissolved, in region of 10 ppm or greater concentration, apply activated carbon at ten times the spilled amount. Use mechanical dredges or lifts to remove immobilized masses of pollutants and precipitates.
Stability
Nonexplosive.
Incompatibilities
Incompatible with the following: Alkalis.

Fire.
Flash Point,°C
153
Fire fighting
Extinguish fire using agent suitable for type of surrounding fire. (Material itself does not burn or burns with difficulty.) Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Keep run-off water out of sewers and water sources.
Fire potential
Combustible, but flammable in xylene solution.
Hazards
Material may burn but does not ignite easily. Cylinder may explode in the heat of fire. Poisonous gases may be generated from the fire or runoff water. Oxidizable in air.
Combustion products
Highly toxic oxides of sulfur and phosphorus are emitted.

Health.
Exposure limit(s)
NIOSH REL: TWA 0.1 mg/m3 [skin]
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.
   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
2783
Response guide
Hazard class
6.1
Packing Group
I; II; III
 
USCG CHRIS Code
DIS
 
Std. Transport #
4921508