Demeton-S-methyl sulfone

  • S-[2-(Ethylsulfonyl)ethyl] O,O-dimethyl phosphorothioate
  • O,O-Dimethyl S-2-(ethylsulfonyl)ethyl phosphorothioate
  • Phosphorothioic acid, S-[2-(ethylsulfonyl)ethyl] O,O-dimethyl ester
Formula
C6H15O5PS2
Structure
Description
Colorless solid
Uses
Pesticide.

Registry Numbers and Inventories.
CAS
17040-19-6
EC (EINECS/ELINCS)
241-109-5
EC Index Number
015-078-00-1
22 28 36/37 45
RTECS
TF9050000
RTECS class
Agricultural Chemical and Pesticide; Mutagen
UN (DOT)
2811
Beilstein/Gmelin
1712536
Beilstein Reference
4-01-00-02465
Swiss Giftliste 1
G-4577
Korea ECL
Listed

Properties.
Formula
C6H15O5PS2
Formula mass
262.30
Melting point, °C
50 - 52
Boiling point, °C
394
Vapor pressure, mmHg
4.8E-6 (26 C)
Solubility in water
Slightly soluble
Heat of vaporization
61.8 kJ/mol

Hazards and Protection.
Storage
Keep tightly closed. Store at 2-8 C
Protection
Compatible chemical-resistant gloves. Chemical safety goggles.
Respirators
Government approved respirator.
Small spills/leaks
Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide.

Fire.
Flash Point,°C
192
Fire fighting
Extinguish using Water spray. Carbon dioxide, dry chemical powder, or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Fire potential
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.
Hazards
Emits toxic fumes under fire conditions.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
3
 
Flammability
0
 
 
Reactivity
0
 

Health.
Poison_Class
2
Exposure effects
Harmful in contact with skin. Toxic by inhalation and if swallowed. Target organ(s): Nerves. Heart.
   Ingestion
Toxic if swallowed.
   Inhalation
Toxic if inhaled. Material may be irritating to mucous membranes and upper respiratory tract.
   Skin
May cause skin irritation. Harmful if absorbed through skin.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician immediately.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of skin contact, flush with copious amounts of water for at least 15 minutes. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
2811
Response guide
Hazard class
6.1
Packing Group
I