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MEVINPHOS (ISOMER MIXTURE)
ICSC: 0924
Peer-Review Status: 14.11.2008 Validated
Methyl 3-(dimethoxyphosphinoyloxy)but-2-enoate
2-methoxycarbonyl-1-methylvinyl dimethyl phosphate 
CAS #: 7786-34-7 RTECS #: GQ5250000
UN #: 3018
EC #: 015-020-00-5
EINECS #: 232-095-1
    Formula: C7H13O6P
Molecular mass: 224.2

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.  Use powder, water spray, foam, carbon dioxide. 
EXPLOSION      
 
EXPOSURE   STRICT HYGIENE! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Pupillary constriction, muscle cramp, excessive salivation. Blurred vision. Sweating. Nausea. Vomiting. Diarrhoea. Abdominal cramps. Dizziness. Convulsions. Unconciousness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer immediately for medical attention. See Notes. 
Skin MAY BE ABSORBED! Further see Inhalation.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Wear protective gloves when administering first aid. Refer immediately for medical attention. 
Eyes Blurred vision.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion 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. Refer immediately for medical attention. See Notes. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Do NOT wash away into sewer. 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 transport with food and feedstuffs.
Severe marine pollutant. 
EC Classification
Symbol: T+, N; R: 27/28-50/53; S: (1/2)-23-28-36/37-45-60-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: I 
GHS Classification
Signal: Danger
Fatal if swallowed
Fatal in contact with skin
Fatal if inhaled vapour
Causes damage to nervous system
Very toxic to aquatic life 
skull;toxiccancer;health hazenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT6-I.  Separated from food and feedstuffs and strong oxidants. Keep in a well-ventilated room. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including phosphoric acid and phosphorus oxides. Reacts violently with strong oxidants. This generates fire and explosion hazard. Attacks iron, stainless steel, brass, some forms of plastic, rubber and coatings. 

Occupational exposure limits
TLV: 0.01mg/m³ as TWA; A4 (not classifiable as a human carcinogen); BEI issued; (ACGIH 2008).
MAK: 0.093 mg/m³; Peak limitation category: II(2); Skin absorption (H); (DFG 2008). 

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 can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
Cholinesterase inhibition. The substance may cause effects on the nervous system. This may result in convulsions and respiratory failure. Exposure far above the OEL could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Decomposes at 300°C
Melting point: 6.9°C (trans), 21°C (cis)
Relative density (water = 1): 1.25
Solubility in water: miscible
Vapour pressure, Pa at 21°C: 0.38
Flash point: 175°C o.c.
Octanol/water partition coefficient as log Pow: 1.2  
The substance is very toxic to aquatic organisms. This substance may be hazardous to the environment. Special attention should be given to birds and 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.
Consult national legislation.
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. 

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