Demeton-o-methyl

  • O-2-Ethylthioethyl O,O-dimethyl phosphorothioate
Formula
C6H15O3PS2
Structure
Description
Pale yellow to colorless liquid with a characteristic odor.
Uses
Acaricide, insecticide.

Registry Numbers and Inventories.
CAS
867-27-6
EC (EINECS/ELINCS)
212-758-1
EC Index Number
015-030-00-X
EC Class
Toxic
RTECS
TG1650000
RTECS class
Agricultural Chemical and Pesticide
UN (DOT)
3018
Beilstein/Gmelin
1707378
Beilstein Reference
4-01-00-02445
EPA OPP
58703
Swiss Giftliste 1
G-6463
Korea ECL
Listed

Properties.
Formula
C6H15O3PS2
Formula mass
230.30
Boiling point, °C
262
Vapor pressure, mmHg
0.02 (25 C)
Vapor density (air=1)
7.6
Density
1.1848 g/cm3 (20 C)
Solubility in water
0.3 g/L
Refractive index
1.498 (20 C)
Partition coefficient, pKow
1.59
Heat of vaporization
47.9 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
Protective gloves and clothing. Face shield or eye protection in combination with breathing protection.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.

Fire.
Flash Point,°C
112
Fire fighting
Small Fires: Dry chemical, carbon dioxide or water spray. Large Fires: Water spray, fog or regular foam.
Fire potential
Combustible material: may burn but does not ignite readily.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Poison_Class
3
Exposure effects
   Ingestion
Abdominal cramps, vomiting, diarrhea, convulsions and unconsciousness. See inhalation.
   Inhalation
Acute effects - pupillary constriction, muscle cramps, excessive salivation, sweating, nausea, dizziness, labored breathing, weakness. May affect the nervous system. Cholinesterase inhibitor. Effects may be delayed.
   Skin
See Inhalation. May be absorbed through the skin.
   Eyes
Pupillary constriction, blurred vision.

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