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FONOFOS
ICSC: 0708
Peer-Review Status: 04.07.1997 Validated
O-Ethyl S-phenylethylphosphonodithioate 
CAS #: 944-22-9 RTECS #: TA5950000
UN #: 3018
EC #: 015-091-00-2
EINECS #: 213-408-0
    Formula: C5H5SPSCH2CH3OCH2CH3 / C10H15OPS2
Molecular mass: 246.3

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.    Use foam, powder, carbon dioxide. 
EXPLOSION      
 
EXPOSURE   PREVENT GENERATION OF MISTS! STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Sweating. Nausea. Dizziness. Laboured breathing. Convulsions. Unconciousness.  Use ventilation, 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 MAY BE ABSORBED! Redness. Pain. Blurred vision.  Wear 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 Weakness. Abdominal cramps. Vomiting. Diarrhoea. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Rest. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.  Do not transport with food and feedstuffs.
Severe marine pollutant. 
EC Classification
Symbol: T+, N; R: 27/28-50/53; S: (1/2)-28-36/37-45-60-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT6-I.  Separated from food and feedstuffs. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
CLEAR COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
The substance is hydrolyzed on contact with strong acids and alkalis. 

Occupational exposure limits
TLV: 0.1mg/m³ as TWA; (skin); A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2004). 

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

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying. 

Effects of short-term exposure
Cholinesterase inhibition. Exposure above the OEL could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
Cholinesterase inhibition. Cumulative effects are possible. See Acute Hazards/Symptoms. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 0.013kPa: 130°C
Melting point: 30°C
Relative density (water = 1): 1.16
Solubility in water: none
Vapour pressure, Pa at 25°C: 0.03
Flash point: 94°C c.c.
Octanol/water partition coefficient as log Pow: 3.94  
This substance may be hazardous to the environment. Special attention should be given to bees and aquatic organisms. 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.
The symptoms of acute intoxication do not become manifest until some hours have passed.
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.
Difonate, Dyfonate 2G, and Stauffer N 2790 are trade names.
Card has been partly updated in October 2005.
See sections Occupational Exposure Limits, Emergency Response. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations