ICSC 1682 - CHLORMEPHOS

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CHLORMEPHOS	ICSC: 1682 (October 2006)
Clormethylphos S-(Chloromethy) O,O-diethyl phosphorodithioate Phosphorodithioic acid, S-(chloromethyl) O,O-diethyl ester

CAS #: 24934-91-6

UN #: 3018

EC Number: 246-538-1

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Combustible. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames.	Use water spray, foam, powder, carbon dioxide.

STRICT HYGIENE! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Dizziness. Nausea. Sweating. Muscle twitching. Pupillary constriction, muscle cramp, excessive salivation. Laboured breathing. Convulsions. Unconsciousness.	Use local exhaust or breathing protection.	Fresh air, rest. Artificial respiration may be needed. Refer immediately for medical attention.
Skin	MAY BE ABSORBED! See Inhalation.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer immediately for medical attention. Wear protective gloves when administering first aid.
Eyes	Blurred vision.	Wear 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 refer for medical attention.
Ingestion	Abdominal cramps. Diarrhoea. Vomiting. 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. Refer immediately for medical attention.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria DANGER Fatal if swallowed, in contact with skin or if inhaled Causes damage to nervous system Toxic to aquatic life Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: I
STORAGE
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Well closed. Store in an area without drain or sewer access.
PACKAGING
Marine pollutant. Do not transport with food and feedstuffs.

CHLORMEPHOS

ICSC: 1682

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID. Physical dangers Chemical dangers Decomposes on burning. This produces toxic and corrosive fumes including phosphorus oxides and sulfur oxides. Attacks some metals.	Formula: C₅H₁₂ClO₂PS₂ Molecular mass: 234.7 Relative density (water = 1): 1.26 Solubility in water, g/100ml at 20°C: 0.006 (very poor) Vapour pressure at 20°C: negligible Flash point: >100 °C Octanol/water partition coefficient as log Pow: 3.0 (estimated)

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID.

Physical dangers

Chemical dangers
Decomposes on burning. This produces toxic and corrosive fumes including phosphorus oxides and sulfur oxides. Attacks some metals.

Formula: C₅H₁₂ClO₂PS₂
Molecular mass: 234.7
Relative density (water = 1): 1.26
Solubility in water, g/100ml at 20°C: 0.006 (very poor)
Vapour pressure at 20°C: negligible
Flash point: >100 °C
Octanol/water partition coefficient as log Pow: 3.0 (estimated)

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body in hazardous amounts by inhalation, through the skin and by ingestion. Effects of short-term exposure Cholinesterase inhibition. The substance may cause effects on the nervous system. This may result in convulsions and respiratory depression. Exposure could cause death. The effects may be delayed. Medical observation is indicated.	Inhalation risk No indication can be given about the rate at which a harmful concentration of this substance in the air is reached. Effects of long-term or repeated exposure Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body in hazardous amounts by inhalation, through the skin and by ingestion.

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

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

Effects of long-term or repeated exposure
Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms.

OCCUPATIONAL EXPOSURE LIMITS

ENVIRONMENT
The substance is toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal.

NOTES
Depending on the degree of exposure, periodic medical examination is suggested. Do NOT take working clothes home. 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.

ADDITIONAL INFORMATION

EC Classification
Symbol: T+, N; R: 27/28-50/53; S: (1/2)-28-36/37-45-60-61

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