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7786-34-7

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Basic Information
CAS No.: 7786-34-7
Name: MEVINPHOS
Molecular Structure:
Molecular Structure of 7786-34-7 (MEVINPHOS)
Formula: C7H13 O6 P
Molecular Weight: 224.15
Synonyms: Crotonicacid, 3-hydroxy-, methyl ester, dimethyl phosphate (6CI,8CI);1-Methoxycarbonyl-1-propen-2-yl dimethyl phosphate;2-Carbomethoxy-1-methylvinyl dimethyl phosphate;2-Methoxycarbonyl-1-methylvinyl dimethyl phosphate; CMDP; Fosdrin; Gesfid;Meniphos; Mevinphos; NSC 46470; O,O-Dimethyl O-(1-carbomethoxy-1-propen-2-yl)phosphate; PD 5; PD 5 (pesticide); Phosdrin; Phosdrin W 10
EINECS: 232-095-1
Annex I Index No: 015-020-00-5
B
Density: 1.216g/cm3
Melting Point: -56 C (quoted by chemical supplier, though other sources givevalues in the range +7 to +14C)
Boiling Point: 110 C
Flash Point: 115.1°C
Solubility:

Stability

    Stable. Combustible. Incompatible with strong oxidizing agents.

Toxicology

    Very toxic, and may be fatal, in contact with the skin, if inhaled and if swallowed. Exposure cancause a wide range of s
Appearance: colourless liquid
Hazard Symbols: Toxic by ingestion, inhalation, and skin absorption; use may be restricted; cholinesterase inhibitor. TLV: TWA 0.01 ppm; STEL 0.03 ppm.
Risk Codes: R27/28; R50/53; R67; R65; R38; R11
Safety: Poison by ingestion, inhalation, skin contact, subcutaneous, intravenous, and intraperitoneal routes. Human systemic effects by ingestion: peripheral motor nerve recording changes. An insecticide. When heated to decomposition it emits toxic fumes of POx.

Analytical Methods:

   

For occupational chemical analysis use NIOSH: Mevinphos (Phosdrin) 2503.

PSA: 91.87000
LogP: 0.86910
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Conditions
ConditionsYield
Heating;
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C20H12EuNO12

C20H12EuNO12*C7H13O6P

Conditions
ConditionsYield
In ethanol at 19.84℃; Temperature; Solvent;
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C20H12EuNO12

C20H12NO12Tb*C7H13O6P

Conditions
ConditionsYield
In ethanol at 19.84℃; Temperature; Solvent;
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Chemistry

The IUPAC name of Mevinphos (CAS NO.7786-34-7): Methyl (E)-3-dimethoxyphosphoryloxybut-2-enoate
Synonyms: Duraphos ; E-Mevinphos;e-mevinphos (trans) ; Mevindrin ; Mevinphos ; 3-Hydroxy-crotonic acid methyl ester dimethyl phosphate ; 2-Carbomethoxy-1-methylvinyldimethyl phosphate ; 2-Methoxycarbonyl-1-methylvinyl dimethyl phosphate
CAS: 7786-34-7 
EINECS: 232-095-1 
Molecular Formula: C7H13O6P 
Molecular Structure:

Formula Weight: 224.15 g/mol
Index of Refraction: 1.437 
Density: 1.216 g/cm3 
Flash Point: 115.1 °C 
Boiling Point: 243.4 °C at 760 mmHg
 

Toxicity Data With Reference

The toxicity of Mevinphos (CAS NO.7786-34-7):

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
bird - wild LD50 oral 1400ug/kg (1.4mg/kg)   Journal de Toxicologie Clinique et Experimentale. Vol. 6(3), Pg. 175, 1986.
duck LD50 oral 4600ug/kg (4.6mg/kg)   Down to Earth. Vol. 35, Pg. 25, 1979.
duck LD50 skin 11mg/kg (11mg/kg)   Toxicology and Applied Pharmacology. Vol. 47, Pg. 451, 1979.
gerbil LD50 intraperitoneal 450ug/kg (0.45mg/kg)   Toxicology and Applied Pharmacology. Vol. 36, Pg. 195, 1976.
man TDLo oral 700ug/kg/28D- (0.7mg/kg) PERIPHERAL NERVE AND SENSATION: RECORDING FROM PERIPHERAL MOTOR NERVE Toxicology and Applied Pharmacology. Vol. 42, Pg. 351, 1977.
mouse LD50 intraperitoneal 2mg/kg (2mg/kg)   Canadian Journal of Biochemistry and Physiology. Vol. 39, Pg. 1790, 1961.
mouse LD50 intravenous 680ug/kg (0.68mg/kg)   Journal of Pharmacy and Pharmacology. Vol. 19, Pg. 612, 1967.
mouse LD50 oral 4mg/kg (4mg/kg) GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY DEPRESSION

BEHAVIORAL: TREMOR		 AMA Archives of Industrial Hygiene and Occupational Medicine. Vol. 9, Pg. 45, 1954.
mouse LD50 skin 12mg/kg (12mg/kg)   Journal of Toxicology and Environmental Health. Vol. 9, Pg. 491, 1982.
mouse LD50 subcutaneous 1180ug/kg (1.18mg/kg)   Journal of Pharmacy and Pharmacology. Vol. 19, Pg. 612, 1967.
pigeon LD50 oral 4210ug/kg (4.21mg/kg)   ASTM Special Technical Publication. Vol. (680), Pg. 157, 1979.
quail LD50 oral 23700ug/kg (23.7mg/kg)   ASTM Special Technical Publication. Vol. (680), Pg. 157, 1979.
rabbit LD50 skin 4700ug/kg (4.7mg/kg)   Guide to the Chemicals Used in Crop Protection. Vol. 6, Pg. 353, 1973.
rat LC50 inhalation 14ppm/1H (14ppm) BEHAVIORAL: TREMOR

LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS		 AMA Archives of Industrial Hygiene and Occupational Medicine. Vol. 9, Pg. 45, 1954.
rat LD50 intraperitoneal 800ug/kg (0.8mg/kg)   Advances in Pest Control Research. Vol. 4, Pg. 117, 1961.
rat LD50 oral 3mg/kg (3mg/kg)   Down to Earth. Vol. 35, Pg. 25, 1979.
rat LD50 skin 4200ug/kg (4.2mg/kg) BEHAVIORAL: TREMOR

BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD
BEHAVIORAL: EXCITEMENT		 Toxicology and Applied Pharmacology. Vol. 2, Pg. 88, 1960.
rat LD50 subcutaneous 940ug/kg (0.94mg/kg)   Folia Medica Vol. 24(4), Pg. 23, 1982.

Consensus Reports

EPA Genetic Toxicology Program. EPA Extremely Hazardous Substances List.

Safety Profile

The Hazard Codes of Mevinphos (CAS NO.7786-34-7): VeryT+DangerousNHarmfulXnFlammableF
Risk Statements:R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R67:Vapours may cause drowsiness and dizziness. R65:Harmful: may cause lung damage if swallowed. R38:Irritating to skin. R11:Highly flammable. 
Safety Statements:S23:Do not breathe vapour. S28:After contact with skin, wash immediately with plenty of soap-suds. S36/37:Wear suitable protective clothing and gloves. S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60:This material and its container must be disposed of as hazardous waste. S61:Avoid release to the environment. Refer to special instructions / safety data sheets. S62:If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. 
Poison by ingestion, inhalation, skin contact, subcutaneous, intravenous, and intraperitoneal routes. Human systemic effects by ingestion: peripheral motor nerve recording changes. An insecticide. When heated to decomposition it emits toxic fumes of POx.                     

.

Standards and Recommendations

OSHA PEL: TWA 0.01 ppm; STEL 0.03 ppm (skin)
ACGIH TLV: TWA 0.01 mg/m3 (skin); Not Classifiable as a Human Carcinogen
DFG MAK: 0.01 ppm (0.093 mg/m3)

Analytical Methods

For occupational chemical analysis use NIOSH: Mevinphos (Phosdrin) 2503.