METHAMIDOPHOS 0176
October 1994
CAS No: 10265-92-6 O,S-Dimethyl phosphoramidothioate
RTECS No: TB4970000 Phosphoramidothioic acid, O,S-dimethyl ester
UN No: 2783 C2H8NO2PS
EC No: 015-095-00-4 Molecular mass: 141.1
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
FIRE Combustible under specific conditions. NO open flames. Powder, alcohol-resistant foam, water
Liquid formulations containing organic spray, carbon dioxide.
solvents may be flammable. Gives off
irritating or toxic fumes (or gases) in a
fire.
EXPLOSION Risk of fire and explosion if formulations
contain flammable/explosive solvents.
EXPOSURE PREVENT DISPERSION OF DUST!
STRICT HYGIENE! AVOID EXPOSURE
OF ADOLESCENTS AND CHILDREN!
Inhalation Dizziness. Sweating. Laboured Ventilation (not if powder), local exhaust, Fresh air, rest. Half-upright position. Refer
breathing. Unconsciousness. or breathing protection. for medical attention. See Notes.
Weakness. Pupillary constriction,
muscle cramp, excessive salivation.
(See Ingestion).
Skin MAY BE ABSORBED! (Further see Protective gloves. Protective clothing. Remove contaminated clothes. Rinse
Inhalation). skin with plenty of water or shower. Refer
for medical attention. (See Notes).
Eyes Redness. Pain. Blurred vision. Face shield, or eye protection in First rinse with plenty of water for several
combination with breathing protection if minutes (remove contact lenses if easily
powder. possible), then take to a doctor.
Ingestion Abdominal cramps. Convulsions. Do not eat, drink, or smoke during work. Rinse mouth. Give a slurry of activated
Diarrhoea. Nausea. Vomiting. Muscle Wash hands before eating. charcoal in water to drink. Rest. Refer for
twitching. (Further see Inhalation). medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance EU classification Unbreakable packaging; put breakable
into sealable containers; if appropriate, moisten first to T+ Symbol packaging into closed unbreakable
prevent dusting. Carefully collect remainder, then remove to N Symbol container. Do not transport with food and
safe place. (Extra personal protection: complete protective R: 24-26/28-50 feedstuffs. Marine pollutant.
clothing including self-contained breathing apparatus). S: (1/2-)28-36/37-45-61
UN classification
UN Hazard Class: 6.1
UN Pack Group: II
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61G41b Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs.
Dry. Keep in a well-ventilated room.
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission 漏
IPCS 2006
International
Programme on
SEE IMPORTANT INFORMATION ON THE BACK.
Chemical Safety
0176 METHAMIDOPHOS
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS CRYSTALS. The substance can be absorbed into the body by inhalation, through the
skin and by ingestion.
Chemical dangers
The substance decomposes on heating and on burning producing toxic Inhalation risk
and irritating fumes including nitrogen oxides, sulfur oxides, and Evaporation at 20/C is negligible; a harmful concentration of airborne
phosphorous oxides. Attacks mild steel and copper-containing alloys particles can, however, be reached quickly on spraying or when
(technical grade). dispersed, especially if powdered.
Occupational exposure limits Effects of short-term exposure
TLV not established. The substance irritates the eyes. The substance may cause effects on
MAK not established. the central nervous system, resulting in convulsions, respiratory failure.
Cholinesterase inhibitor. Exposure may result in death. The effects may
be delayed. Medical observation is indicated.
Effects of long-term or repeated exposure
The substance may have effects on the nervous system, resulting in
delayed neuropathy. Cholinesterase inhibitor; cumulative effect is
possible: see acute hazards/symptoms.
PHYSICAL PROPERTIES
Melting point: 44/C Vapour pressure, Pa at 20/C: 0.002
Relative density (water = 1): 1.3 Octanol/water partition coefficient as log Pow: -0.66
Solubility in water: good
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to birds, honey bees and fish.
NOTES
Use of alcoholic beverages enhances the harmful effect.
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.
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.
Do NOT take working clothes home.
Bay 71628, Monitor, Pillaron, SRA 5172 and Tamaron are trade names.
If the substance is present under the form of a formulation containing hydrocarbon solvents, vomiting may not be induced.
Card has been partially updated in January 2008: see Ingestion First Aid.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2006
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