7786-34-7 Usage
Description
MEVINPHOS is a pesticide that is both an insecticide and acaricide. It is a colorless liquid in its pure form and a pale yellow liquid in its technical grade, with a very mild odor. It is soluble in water and very soluble in various organic solvents. It acts quickly as a contact insecticide and a systemic insecticide, making it effective in controlling a broad spectrum of insects and mites.
Used in Agriculture:
MEVINPHOS is used as an insecticide and acaricide for the protection of crops. It is effective in controlling a wide range of insects, including aphids, grasshoppers, leaf-hoppers, cutworms, caterpillars, and many others, on field, forage, vegetable, and fruit crops. It also acts as an acaricide, killing or controlling mites and ticks.
Used in Fruits, Vegetables, and Ornamentals:
MEVINPHOS is used as a contact insecticide and acaricide for the control of chewing insects and spider mites in fruits, vegetables, and ornamentals. Its quick action and broad-spectrum control make it a valuable tool in maintaining the health and productivity of these crops.
Air & Water Reactions
Hydrolyzes rapidly as MEVINPHOS dissolves in water.
Reactivity Profile
Organophosphates, such as MEVINPHOS, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Hazard
Toxic by ingestion, inhalation, and skinabsorption; use may be restricted; cholinesteraseinhibitor. Questionable carcinogen.
Health Hazard
MEVINPHOS is super toxic; the probable oral lethal dose for humans is less than 5 mg/kg, or a taste (less than 7 drops) for a 150-lb. person. It has direct and immediate effects whether it is swallowed, inhaled, or absorbed through the skin.
Health Hazard
A severely acute toxicant by all routes;cholinesterase inhibitor; absorbed throughthe skin, lungs, and mucous membranes;more toxic by subcutaneous or intravenousroutes than by an intraperitoneal route; toxicsymptoms include headache, weakness,blurred vision, diarrhea, and tightness inthe chest; signs of severe poisoning aresweating, salivation, lacrimation, constrictionof the pupils, depression, tremor, and convulsions; oral LD50 value (mice): 4 mg/kg;skin LD50 value (mice): 12 mg/kg; exposure limit: TLV-TWA 0.01 (～0.1 mg/m3)(ACGIH, MSHA, and OSHA).
Fire Hazard
Fire may produce irritating or poisonous gases. Runoff from fire control may give off poisonous gases and also cause pollution. When heated to decomposition, MEVINPHOS emits toxic fumes of phosphorus oxides. Avoid strong oxidizers. Avoid temperatures above 77-86F, sources of heat, fire, free flames or spark-generating equipment.
Trade name
AI3-22374?; APAVINPHOS?; CASWELL
No. 160B?; CENTURY-CIDE?[C]; COMPOUND
2046?; DURHAM?[C]; EXCELCIDE?[C]; GESFID?;
GESTID?; PD 5?; HELENA PHOSDRIN?[C]
Contact allergens
Sensitization to mevinphos (also named Duraphos,
Phosdrin, and Phosfene), an organophosphate cholinesterase
inhibitor that is used as an insecticide, was
rarely reported.
Safety Profile
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.
Potential Exposure
Those engaged in the manufacture,
formulation, and application of this super toxic contact and
systemic insecticide and acaricide.
Environmental Fate
Plant. In plants, mevinphos is hydrolyzed to phosphoric acid dimethyl ester, phosphoric
acid and other less toxic compounds (Hartley and Kidd, 1987). In one day, the compound
is almost completely degraded in plants (Cremlyn, 1991). Casida et al. (1956) proposed
two degradative pathways of mevinphos in bean plants and cabbage. In the first degradative
pathway, cleavage of the vinyl phosphate bond affords methylacetoacetate and acetoacetic
acid which may be precursors to the formation of the end products dimethyl phosphoric
acid, methanol, acetone and carbon dioxide. In the other degradative pathway, direct
hydrolysis of the carboxylic ester would yield vinyl phosphates as intermediates. The halflife
of mevinphos in bean plants was 12 hours (Casida et al., 1956). In alfalfa, the halflife
was 17 hours (Huddelston and Gyrisco, 1961).Chemical/Physical. The reported hydrolysis half-lives of cis-mevinphos and transmevinphos
at pH 11.6 are 1.8 and 3.0 hours, respectively (Casida et al., 1956). The
volatility half-lives for the cis and trans forms at 28°C were 21 and 24 hours, respectively
(Casida et al., 1956). Worthing and Hance (1991) reported that at pH values of 6, 7, 9 and
11, the hydrolysis half-lives were 120 days, 35 days, 3.0 days and 1.4 hours, respectively
(Worthing and Hance, 1991).
Emits toxic phosphorus oxide fumes when heated to decomposition (Lewis, 1990).
Shipping
UN3018 Organophosphorus pesticides, liquid,
toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
UN2783 Organophosphorus pesticides, solid, toxic, Hazard
Class: 6.1; Labels: 6.1-Poisonous material.
Toxicity evaluation
Acute oral LD50 for rats is 3–12 mg/kg.Inhalation LC50 (1 h) for rats is 0.125 mg/L air. No
ill effects were observed in rats receiving 4 mg/kg diet
(0.2 mg/kg/d) for 2 yr. ADI is 1.5 μg/kg b.w. In comparison
with the Z-isomer, E-mevinphos is a more effective
insecticide and is detoxified more quickly in plants but
more slowly in animals.
Incompatibilities
Decomposes in heat (below boiling point
@ 300℃) producing phosphoric acid and phosphorous oxides
fumes. Strong oxidizers may cause release of toxic phosphorus
oxides. Organophosphates, in the presence of strong
reducing agents such as hydrides, may form highly toxic and
flammable phosphine gas. Keep away from alkaline materials.
Corrosive to cast iron, some stainless steels and brass.
Attacks some forms of plastics, rubber and coatings.
Waste Disposal
Mevinphos is 50% hydrolyzed
in aqueous solutions at an unspecified temperature in
1.4 hours at pH 11, 35 days at pH 7; and 120 days at pH 6.
Thermal decomposition is rapidly accomplished by lime
sulfur. Mevinphos may also incinerated. In accordance with
40CFR165, follow recommendations for the disposal of
pesticides and pesticide containers. Must be disposed properly
by following package label directions or by contacting
your local or federal environmental control agency, or by
contacting your regional EPA office.
Check Digit Verification of cas no
The CAS Registry Mumber 7786-34-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 6 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 7786-34:
(6*7)+(5*7)+(4*8)+(3*6)+(2*3)+(1*4)=137
137 % 10 = 7
So 7786-34-7 is a valid CAS Registry Number.
InChI:InChI=1/C7H13O6P/c1-6(5-7(8)10-2)13-14(9,11-3)12-4/h5H,1-4H3
