International Chemical Safety Cards

FENTHION ICSC: 0655
FENTHION
O,O-Dimethyl-O-(4-methylthio-m-tolyl) phosphorothioate
Phosphorothioic acid, O,O-dimethyl O-(3-methyl-4-(methylthio)phenyl) ester
C10H15O3PS2/(H3CO)2PS-O-C6H3(CH3)-S-CH3
Molecular mass: 278.3
CAS # 55-38-9
RTECS # TF9625000
ICSC # 0655
UN # 3018
EC # 015-048-00-8
TYPES OF
HAZARD/
EXPOSURE 		ACUTE HAZARDS/
SYMPTOMS 		PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible. Liquid formulations containing organic solvents may be flammable. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


 
EXPOSURE
PREVENT GENERATION OF MISTS!

INHALATION Convulsions. Dizziness. Laboured breathing. Nausea. Unconsciousness. Vomiting. Pupillary constriction, muscle cramp, excessive salivation.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention.
SKIN MAY BE ABSORBED! Pupillary constriction (Further see Inhalation).
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
EYES
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 take to a doctor.
INGESTION Abdominal cramps. Diarrhoea. Nausea. Vomiting. Pupillary constriction, muscle cramps, excessive salivation (further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Collect leaking liquid in sealable containers. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: P3 filter respirator for toxic particles).
Separated from food and feedstuffs. Well closed. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
T symbol
N symbol
R: 21-25-50/53
S: (1/2-)36/37-45-60-61
UN Hazard Class: 6.1
UN Packing Group: III
Severe marine pollutant.
SEE IMPORTANT INFORMATION ON BACK
ICSC: 0655 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

FENTHION ICSC: 0655

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID WHEN PURE.

PHYSICAL DANGERS:


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

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV: ppm; 0.2 mg/m3 (as TWA) (skin) (ACGIH 1993-1994).


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance may cause effects on the nervous system , resulting in convulsions, respiratory failure. Cholinesterase inhibitor. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Cholinesterase inhibitor; cumulative effect is possible: see acute hazards/symptoms.
PHYSICAL
PROPERTIES
 Decomposes below boiling point at 210°C
Relative density (water = 1): 1.25
 Solubility in water, g/100 ml at 20°C: none
Vapour pressure, Pa at 25°C: very low
ENVIRONMENTAL
DATA
 This substance may be hazardous to the environment; special attention should be given to birds, fish.
N O T E S
The technical grade (95-98% pure) is a yellow to brown oil with a weak garlic-like odour. Carrier solvents used in commercial formulations may change physical and toxicological properties. Do NOT take working clothes home. Baycid, Baytex, Entex, Lebaycid, Mercaptophos, Queletox and Tiguvon are trade names.
Transport Emergency Card: TEC (R)-61G45b
ADDITIONAL INFORMATION


ICSC: 0655 FENTHION
© 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.