International Chemical Safety Cards

PHOSMET ICSC: 0543

PHOSMET
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
C11H12NO4PS2
Molecular mass: 317.3
CAS # 732-11-6
RTECS # TE2275000
ICSC # 0543
UN # 2783
EC # 015-101-00-5
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, carbon dioxide, water spray, powder.
EXPLOSION


 
EXPOSURE
PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!
IN ALL CASES CONSULT A DOCTOR!
INHALATION Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Weakness.
Ventilation (not if powder), local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN MAY BE ABSORBED! (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.
Safety goggles, or eye protection in combination with breathing protection if powder.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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 STORAGE PACKAGING & LABELLING
Do NOT wash away into sewer. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place (extra personal protection: chemical protection suit including self-contained breathing apparatus).
Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs.
Do not transport with food and feedstuffs.
Xn symbol
R: 21/22
S: (2-)22-36/37
UN Hazard Class: 6.1
UN Packing Group: III
Marine pollutant.
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0543 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

PHOSMET ICSC: 0543

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PHYSICAL STATE; APPEARANCE:
COLOURLESS TO OFF-WHITE CRYSTALS.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating or on burning, producing toxic fumes including nitrogen oxides, phosphorous oxides, and sulfur oxides.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV not established.


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, 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 by spraying or dispersing.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the nervous system. Cholinesterase inhibitor. 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 weakness. Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms.
PHYSICAL
PROPERTIES
 Decomposes below boiling point at >100°C
Melting point: 72°C
Relative density (water = 1): 1.03
Solubility in water: poor		 Vapour pressure, Pa at 50°C: 0.13
Relative vapour density (air = 1): 10.9
Octanol/water partition coefficient as log Pow: 2.83
ENVIRONMENTAL
DATA
 The substance is very toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to bees. Avoid release to the environment in circumstances different to normal use.
N O T E S
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. Appa, Decemthion, Fosdan, Imidan, Kemolate, Percolate, Prolate, Safidon, Smidan are trade names.
Transport Emergency Card: TEC (R)-61G41c
ADDITIONAL INFORMATION


ICSC: 0543 PHOSMET
© 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.