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DEMETON-S ICSC: 0864
April 2006
O,O-Diethyl S-2-ethylthioethyl phosphorothioate
Demethonthiol
PDF for printing Explanation of fields
CAS No: 126-75-0
RTECS No: TF3130000
UN No: 3018
EC No: 015-029-00-4
    C8H19O3PS2
Molecular mass: 258.3

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. Foam, powder, carbon dioxide.
EXPLOSION      
 
EXPOSURE   PREVENT GENERATION OF MISTS! AVOID ALL CONTACT! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN! IN ALL CASES CONSULT A DOCTOR!
Inhalation Dizziness. Nausea. Vomiting. Pupillary constriction, muscle cramp, excessive salivation. Laboured breathing. Convulsions. Unconsciousness. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. See Notes.
Skin MAY BE ABSORBED! Muscle twitching. Further (see Inhalation). Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
Eyes Redness. Pain. Face shield. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Diarrhoea. Further (see Inhalation). Do not eat, drink, or smoke during work. Wash hands before eating. Give a slurry of activated charcoal in water to drink. Rest. Refer for medical attention. See Notes.

SPILLAGE DISPOSAL PACKAGING & LABELLING
Chemical protection suit including self-contained breathing apparatus. 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 let this chemical enter the environment. EU classification
T+ Symbol
R: 27/28
S: (1/2-)28-36/37-45
UN classification
UN Hazard Class: 6.1
UN Pack Group: I
GHS classification
Signal: Danger
Skull-Health haz
Fatal if swallowed
Causes damage to nervous system

Do not transport with food and feedstuffs.


EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61 G44 Separated from food and feedstuffs. Dry. Keep in a well-ventilated room.

IMPORTANT DATA
Physical State; Appearance
COLOURLESS OILY LIQUID.

Chemical dangers
The substance decomposes on heating, producing toxic and corrosive fumes including phosphorus oxides and sulfur oxides

Occupational exposure limits
TLV not established.
MAK: IIb (not established but data is available) skin absorption (H); (DFG 2005).

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin, by ingestion.

Inhalation risk
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

Effects of short-term exposure
The substance may cause effects on the central nervous system, resulting in convulsions and respiratory depression. Cholinesterase inhibition. Exposure may result in death. The effects may be delayed. Medical observation is indicated. See Notes.


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 0.1kPa: 128°C
Relative density (water = 1): 1.13
Solubility in water, g/100 ml at 20°C: 0.2
Vapour pressure, Pa at 20°C: 0.035
Relative vapour density (air = 1): 8.92
This substance may be hazardous to the environment; special attention should be given to fish and honey bees. This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.

NOTES
Depending on the degree of exposure, periodic medical examination is indicated.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Carrier solvents used in commercial formulations may change physical and toxicological properties.
Do NOT take working clothes home.

IPCS
International
Programme on
Chemical Safety
WHO ILO UNEP EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.

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