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NIOSH

MEVINPHOS (ISOMER MIXTURE)

ICSC: 0924

Methyl 3-(dimethoxyphosphinoyloxy)but-2-enoate
2-methoxycarbonyl-1-methylvinyl dimethyl phosphate
C7H13O6P
Molecular mass: 224.2
ICSC # 0924 		CAS # 7786-34-7
RTECS # GQ5250000
UN # 3018
EC # 015-020-00-5
November 14, 2008 Validated

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.
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. Unconsciousness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention immediately. 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.
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

STORAGE

PACKAGING & LABELLING

Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Separated from food and feedstuffs, strong oxidants. Keep in a well-ventilated room. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
Do not transport with food and feedstuffs.
Severe marine pollutant.
T+ symbol
N symbol
R: 27/28-50/53
S: 1/2-23-28-36/37-45-60-61
UN Hazard Class: 6.1
UN Packing Group: I
Signal: Danger
Skull-Health haz-Enviro
Fatal if swallowed
Fatal in contact with skin
Fatal if inhaled vapour
Causes damage to the nervous system
Very toxic to aquatic life
ICSC: 0924 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

MEVINPHOS (ISOMER MIXTURE)

ICSC: 0924

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PHYSICAL STATE; APPEARANCE:
COLOURLESS

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including phosphoric acid and phosphorus oxides. Reacts violently with strong oxidants, causing fire and explosion hazard. Attacks iron, stainless steel, brass, some forms of plastic, rubber

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.01 mg/m3 as TWA, A4 (not classifiable as a human carcinogen); BEI issued (ACGIH 2008).
MAK: 0.093 mg/m3
Peak limitation category: II(2)
(DFG 2008 ).
OSHA PEL†: TWA 0.1 mg/m3 skin
NIOSH REL: TWA 0.01 ppm (0.1 mg/m3) ST 0.03 ppm (0.3 mg/m3) skin
NIOSH IDLH: 4 ppm See: 7786347


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 inhibitor. The substance may cause effects on the nervous system , resulting in convulsions, respiratory failure. Exposure far above OEL may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Decomposes at 300 °C
Melting point: (trans) 6.9 °C, (cis) 21 °C
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

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to birds and This substance does enter the environment under normal use. Great care, however, should be given to avoid any additional release, e.g. through inappropriate disposal.

N O T E S

Depending on the degree of exposure, periodic medical examination is indicated. 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.
Transport Emergency Card: TEC (R)-61GT6-I

ADDITIONAL INFORMATION



ICSC: 0924 MEVINPHOS (ISOMER MIXTURE)
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, 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. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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