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PHOSMETICSC: 0543
O,O-Dimethyl S-phthalimidomethyl phosphorodithioate
Phosphorodithioic acid, S-((1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl) O,O-dimethyl ester
O,O-Dimethyl phosphorodithioate S-ester with N-(mercaptomethyl) phthalimide
October 2004
CAS #: 732-11-6
UN #: 2783
EC Number: 211-987-4

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.  Risk of fire and explosion if formulations contain flammable/explosive solvents.  NO open flames.    Use water spray, powder, foam, carbon dioxide.   

 PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Weakness.  Use ventilation (not if powder), local exhaust or breathing protection. Avoid inhalation of dust and mist.  Fresh air, rest. Refer 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. 
Eyes Redness.  Wear safety goggles, 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. 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 CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 

STORAGE
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. 
PACKAGING
Do not transport with food and feedstuffs.
Marine pollutant. 
PHOSMET ICSC: 0543
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS-TO-OFF-WHITE CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
Decomposes on heating and on burning. This produces toxic fumes including nitrogen oxides, phosphorus oxides and sulfur oxides. 

Formula: C11H12NO4PS2
Molecular mass: 317.3
Decomposes at 100°C
Melting point: 72°C
Density: 1.03 g/cm³
Solubility in water, g/100ml at 20°C: 0.003
Vapour pressure at 20°C: negligible
Octanol/water partition coefficient as log Pow: 2.83  


EXPOSURE & HEALTH EFFECTS

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

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

Inhalation risk
A harmful concentration of airborne particles can be reached quickly on spraying or when dispersed, especially if powdered. 

Effects of long-term or repeated exposure
The substance may have effects on the nervous system. This may result in weakness. Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. 


OCCUPATIONAL EXPOSURE LIMITS
 

ENVIRONMENT
The substance is very toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to bees. 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.
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. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: Xn, N; R: 21/22-50/53; S: (2)-22-36/37-60-61 

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    See Also:
       Toxicological Abbreviations
       Phosmet (JMPR Evaluations 2003 Part II Toxicological)
       Phosmet (Pesticide residues in food: 1976 evaluations)
       Phosmet (Pesticide residues in food: 1978 evaluations)
       Phosmet (Pesticide residues in food: 1979 evaluations)
       Phosmet (Pesticide residues in food: 1981 evaluations)
       Phosmet (Pesticide residues in food: 1984 evaluations)
       Phosmet (Pesticide residues in food: 1994 evaluations Part II Toxicology)