International Chemical Safety Cards

DEMETON-O-METHYL ICSC: 0429

DEMETON-O-METHYL
O-2-Ethylthioethyl O,O-dimethyl phosphorothioate
C6H15O3PS2 / (CH3O)2P(S)OCH2CH2SCH2CH3
Molecular mass: 230.3
CAS # 867-27-6
RTECS # TG1650000
ICSC # 0429
UN # 3018
EC # 015-030-00-X
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, water spray, foam, carbon dioxide.
EXPLOSION Risk of fire and explosion if formulations contain flammable/explosive solvents.


 
EXPOSURE
PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
INHALATION Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Weakness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN MAY BE ABSORBED! (further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
EYES Pupillary constriction. Blurred vision.
Face shield, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION Abdominal cramps. Vomiting. Diarrhoea. Convulsions. Unconsciousness. (further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Rest. Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: chemical protection suit including self-contained breathing apparatus).
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
T symbol
R: 25
S: (1/2-)24-36/37-45
UN Hazard Class: 6.1
UN Packing Group: III
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0429 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

DEMETON-O-METHYL ICSC: 0429

I

M

P

O

R

T

A

N

T



D

A

T

A
PHYSICAL STATE; APPEARANCE:
COLOURLESS TO PALE YELLOW OILY LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating and on burning producing toxic fumes including phosphorous oxides, sulfur oxides.




ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C on spraying or dispersing much faster.

EFFECTS OF SHORT-TERM EXPOSURE:
 The substance may cause effects on the nervous system. Cholinesterase inhibitor. The effects may be delayed. Medical observation is indicated.


PHYSICAL
PROPERTIES
 Boiling point at 0.07 kPa: 93°C
Relative density (water = 1): 1.2
Solubility in water, g/100 ml at 20°C: 0.03		 Vapour pressure, Pa at 20°C: 0.025
Relative vapour density (air = 1): 7.9
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
ENVIRONMENTAL
DATA
 Avoid release to the environment in circumstances different to normal use.
N O T E S
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available. If the substance is formulated with solvent(s) also consult the card(s) (ICSC) of the solvent(s). Carrier solvents used in commercial formulations may change physical and toxicological properties. Methylsystox is a trade name. Also consult ICSC # 0705.
Transport Emergency Card: TEC (R)-61G43c
ADDITIONAL INFORMATION


ICSC: 0429 DEMETON-O-METHYL
© IPCS, CEC, 1993
IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.