International Chemical Safety Cards

DIMETHOATE ICSC: 0741
DIMETHOATE
Fosfamid
O,O-Dimethyl S-methylcarbamoylmethyl phosphorodithioate
Phosphorodithioic acid, O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) ester
CH3NHCOCH2SPS(OCH3)2
Molecular mass: 229
CAS # 60-51-5
RTECS # TE1750000
ICSC # 0741
UN # 2783
EC # 015-051-00-4
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. Liquid formulation containing organic solvents may be flammable.
NO open flames.
Water spray, powder, carbon dioxide.
EXPLOSION Finely dispersed particles form explosive mixtures in air.


 
EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!

INHALATION (see Ingestion).
Ventilation (not if powder).
Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
SKIN See Ingestion.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
EYES Redness. Pain.
Safety goggles, or 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. Convulsions. Dizziness. Laboured breathing. Nausea. Unconsciousness. Vomiting. Pupillary constriction, muscle cramps, excessive salivation.
Do not eat, drink, or smoke during work.
Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Sweep spilled substance into containers. Carefully collect remainder, then remove to safe place (extra personal protection: self-contained breathing apparatus).
Separated from food and feedstuffs. Cool. Dry. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
Xn symbol
R: 20/21/22
S: 2-13
UN Hazard Class: 6.1
UN Packing Group: III
Severe marine pollutant.
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0741 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

DIMETHOATE ICSC: 0741

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PHYSICAL STATE; APPEARANCE:
IF PURE: COLOURLESS CRYSTALS , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating , on burning producing toxic fumes: nitrogen oxides, phosphorous oxides and sulfur oxides. Unstable in alkaline solution. Incompatible with alkaline pesticides. Slightly corrosive to iron.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established.
PDK: 0.5 mg/m3 MAC (USSR 1977).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body through the skin and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates slightly the eyes. The substance may cause effects on the nervous system , resulting in cholinesterase inhibition. Exposure at high levels may result in convulsions and death due to respiratory failure. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis observed in rare cases.
PHYSICAL
PROPERTIES
 Boiling point at 0.0013 kPa: 86°C
Melting point: 51-52°C
Relative density (water = 1): 1.281
Solubility in water, g/100 ml at 21°C: 2.5
 Vapour pressure, Pa at 25°C: 0.001
Flash point: 107°C (c.c.)
Octanol/water partition coefficient as log Pow: 0.5-0.78
ENVIRONMENTAL
DATA
 This substance may be hazardous to the environment; special attention should be given to very sensitive organisms like honey bees, and also to fish and birds.
NOTES
Other melting points: 45-47°C, technical grade. Depending on the degree of exposure, periodic medical examination is indicated. The symptoms of poisoning do not become manifest until days. 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. Bi 58, Cygon, Fostion MM, Perfekthion, Rogor, Roxion are trade names.
ADDITIONAL INFORMATION


ICSC: 0741 DIMETHOATE
© 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.