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Malathion

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Malathion

EINECS 204-497-7
CAS No. 121-75-5 Density 1.272 g/cm3
PSA 138.26000 LogP 2.77240
Solubility water: 0.0145 g/100 mL Melting Point 2.85 °C
Formula C10H19O6PS2 Boiling Point 385.1 °C at 760 mmHg
Molecular Weight 330.363 Flash Point 186.7 °C
Transport Information UN 2783 Appearance deep brown to yellow liquid
Safety 2-24-60-61-62 Risk Codes 22-50/53-67-65-38-11
Molecular Structure Molecular Structure of 121-75-5 (Malathion) Hazard Symbols HarmfulXn,DangerousN
Synonyms

1,2-Bis(ethoxycarbonyl)ethyl O,O-dimethyl phosphorodithioate;Diethyl (dimethoxyphosphinothioylthio)succinate;O,O-Dimethyl S-(1,2-dicarbethoxyethyl) dithiophosphate;

Article Data 21

Malathion Chemical Properties

IUPAC Name: diethyl 2-dimethoxyphosphinothioylsulfanylbutanedioate 
Empirical Formula: C10H19O6PS2
Molecular Weight: 330.358g/mol
EINECS: 204-497-7 
Structure of Malathion (CAS NO.121-75-5):

Index of Refraction: 1.508
Molar Refractivity: 77.5 cm3
Molar Volume: 259.6 cm3
Polarizability: 30.72×10-24cm3
Surface Tension: 47.1 dyne/cm
Density: 1.272 g/cm3
Flash Point: 186.7 °C
Enthalpy of Vaporization: 63.39 kJ/mol 
Melting point: 2.85 ºC
Boiling Point: 385.1 °C at 760 mmHg
Vapour Pressure: 3.9E-06 mmHg at 25°C 
Water solubility: 0.0145 g/100 mL 
Stability: Stable. Incompatible with oxidizing agents, metals. 
Product Categories: Metal Isotopes;INSECTICIDE;Sulfur & Selenium Compounds;2000/60/ECMore...Close...;Alpha sort;Endocrine Disruptors (Draft)Pesticides&Metabolites;H-MAlphabetic;MA -MDPesticides;2000/60/EC;AcaricidesMethod Specific;Endocrine Disruptors (Draft)Alphabetic;EPA;European Community: ISO and DIN;Insecticides;M;OrganophorousMethod Specific;Pesticides;Pesticides&Metabolites 
Canonical SMILES: CCOC(=O)CC(C(=O)OCC)SP(=S)(OC)OC
InChI: InChI=1S/C10H19O6PS2/c1-5-15-9(11)7-8(10(12)16-6-2)19-17(18,13-3)14-4/h8H,5-7H2,1-4H3
InChIKey: JXSJBGJIGXNWCI-UHFFFAOYSA-N

Malathion Uses

 Malathion (CAS NO.121-75-5) is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito eradication. In the US, it is the most commonly used organophosphate insecticide. Malathion has also been used to combat the Mediterranean Fruit Fly in Australia. Malathion was sprayed in many cities to combat West Nile virus. And it is also used in conjunction with diesel fuel to fog an area where there is an infestation of mosquitoes. Malathion in low doses (0.5% preparations) can be used as a treatment for head lice, body lice, and scabies.It is one of the very popular, short-lived broad-spectrum insecticides for application to nearly all fruits, vegetables, field crops, dairy livestock, and household insects.

Malathion Toxicity Data With Reference

1.    

mmo-sat 10 mg/L

    TGANAK    Tsitologiya i Genetika. 15 (3)(1981),68.
2.    

sce-hmn:lym 40 mg/L

    MUREAV    Mutation Research. 88 (1981),307.
3.    

orl-man LDLo:471 mg/kg:CNS,CVS,PUL

    ATXKA8    Archiv fuer Toxikologie. 23 (1967),11.
4.    

orl-wmn LDLo:246 mg/kg

    AEHLAU    Archives of Environmental Health. 33 (1978),240.
5.    

orl-rat LD50:290 mg/kg

    85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmerov, N.F., et al.,Moscow, USSR.: Centre of International Projects, GKNT,1982,56.
6.    

ihl-rat LC50:43,790 µg/m3/4H

    GISAAA    Gigiena i Sanitariya. 56 (2)(1991),80.
7.    

ipr-rat LD50:250 mg/kg

    ARZNAD    Arzneimittel-Forschung. Drug Research. 22 (1972),1926.
8.    

scu-rat LD50:1000 mg/kg

    JEENAI    Journal of Economic Entomology. 50 (1957),356.
9.    

ivn-rat LD50:50 mg/kg

    ARZNAD    Arzneimittel-Forschung. Drug Research. 5 (1955),626.
10.    

orl-mus LD50:190 mg/kg

    85GMAT    Toxicometric Parameters of Industrial Toxic Chemicals Under Single Exposure Izmero

 

Malathion Consensus Reports

IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal No Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 30 ,1983,p. 103.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; NCI Carcinogenesis Bioassay (feed); No Evidence: mouse, rat NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-24 ,1978. ; No Evidence: rat NCITR*    National Cancer Institute Carcinogenesis Technical Report Series. (Bethesda, MD 20014) No. NCI-CG-TR-192 ,1979. . EPA Genetic Toxicology Program.

Malathion Safety Profile

A human poison by ingestion and skin contact. Can penetrate intact skin. An experimental poison by ingestion, inhalation, intraperitoneal, intravenous, intraarterial, and subcutaneous routes. Human systemic effects by ingestion: coma, blood pressure depression, and difficulty in breathing. Questionable carcinogen. An experimental teratogen. Other experimental reproductive effects. Human mutation data reported. Has caused allergic sensitization of the skin. An organic phosphate cholinesterase inhibitor. When heated to decomposition it emits toxic fumes of POx and SOx. See also PHOSPHATES and PARATHION.
Hazard Codes: Xn;N;F
Risk Statements: 22-50/53-67-65-38-11
22:  Harmful if swallowed 
50/53:  Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment 
67:  Vapors may cause drowsiness and dizziness 
65:  Harmful: May cause lung damage if swallowed 
38:  Irritating to the skin 
11:  Highly Flammable
Safety Statements: 2-24-60-61-62
2:  Keep out of the reach of children 
24:  Avoid contact with skin 
60:  This material and/or its container must be disposed of as hazardous waste 
61:  Avoid release to the environment. Refer to special instructions safety data sheet 
62:  If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label
RIDADR:  UN 2783
HazardClass:  6.1(b)

Malathion Standards and Recommendations

OSHA PEL: TWA Total Dust: 10 mg/m3; Respirable Fraction: 5 mg/m3 (skin)
ACGIH TLV: TWA 1 mg/m3 (skin); Not Classifiable as a Human Carcinogen
DFG MAK: 15 mg/m3
NIOSH REL: (Malathion) TWA 15 mg/m3

Malathion Analytical Methods

For occupational chemical analysis use OSHA: #ID-62 or NIOSH: EPN, Malathion, and Parathion, 5012.

Malathion Specification

 Malathion , its cas register number is 121-75-5. It also can be called  ((Dimethoxyphosphinothioyl)thio)butanedioic acid diethyl ester ; American cyanamid 4,049 ; Butanedioic acid, ((dimethoxyphosphinothioyl)thio)-, diethyl ester ; Camathion ;
 Carbethoxy malathion ; Dicarboethoxyethyl O,O-dimethyl phosphorodithioate ; Dorthion ; Ethiolacar ; Forthion ; Hilthion ;
Karbofos ; Malacide ; Mercaptosuccinic acid diethyl ester ; O,O-Dimethyl S-(1,2-bis(ethoxycarbonyl)ethyl) dithiophosphate ;
 Oleophosphothion ; Paladin ; Phosphorodithioic acid, O,O-dimethyl ester, S-ester with diethyl mercaptosuccinate ; S-(1,2-Bis(carbethoxy)ethyl) O,O-dimethyl dithiophosphate ; Sadophos ; Succinic acid, mercapto-, diethyl ester, S-ester with O,O-dimethyl phosphorodithioate ; Sumitox . Malathion (CAS NO.121-75-5) is a deep brown to yellow liquid

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