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Parathion-methyl

Parathion-methyl Basic information
Product Name:Parathion-methyl
Synonyms:NITROX 80(R);NITRAN;O,O-DIMETHYL O-(4-NITROPHENYL)-PHOSPHOROTHIOATE;O,O-DIMETHYL-O-P-NITROPHENYL PHOSPHOROTHIOATE(R);O,O-Dimethyl O-(p-nitrophenyl) thionophosphate;PARASHOOT(R);PARATHION-METHYL;PARTON(R)
CAS:298-00-0
MF:C8H10NO5PS
MW:263.21
EINECS:206-050-1
Product Categories:Agro-Chemicals;INSECTICIDE;META - METHEnvironmental Standards;2000/60/ECMore...Close...;AcaricidesMethod Specific;Alpha sort;Endocrine Disruptors (Draft)Pesticides&Metabolites;EPA;European Community: ISO and DIN;H-MAlphabetic;Insecticides;M;MetabolitesPesticides;Oeko-Tex Standard 100;OrganophorousMethod Specific;Pesticides;Pesticides&Metabolites;PesticidesMethod Specific;Endocrine Disruptors (Draft)Alphabetic
Mol File:298-00-0.mol
Parathion-methyl Structure
Parathion-methyl Chemical Properties
Melting point 36°C
Boiling point 143°C (1.0 mmHg)
density 1.36
refractive index nD25 1.5367
Fp 46.1°C
storage temp. APPROX 4°C
form solid
Water Solubility 0.005 g/100 mL
BRN 8905814
Stability:Stable. Flammable.
CAS DataBase Reference298-00-0(CAS DataBase Reference)
NIST Chemistry ReferencePhosphorothioic acid, o,o-dimethyl-o-p-nitrophenyl ester(298-00-0)
EPA Substance Registry SystemPhosphorothioic acid, O,O-dimethyl O-(4-nitrophenyl) ester(298-00-0)
Safety Information
Hazard Codes T+;N,N,T+,Xn,F
Risk Statements 5-24-26/28-48/22-50/53-10-67-66-51/53-36-20/22-11-65-38
Safety Statements 28-36/37-45-60-61-26-62-16
RIDADR UN 2052/2783/2811
WGK Germany 3
RTECS TG0175000
HazardClass 6.1(a)
PackingGroup II
HS Code 29201100
Hazardous Substances Data298-00-0(Hazardous Substances Data)
ToxicityLD50 in male, female rats (mg/kg): 14, 24 orally; 67, 67 dermally (Gaines)
MSDS Information
Parathion-methyl Usage And Synthesis
Chemical Propertieswhite crystalline powder
Chemical PropertiesMethyl parathion is a white to yellow-brown, crystalline solid with a garlic odor.
UsesParathion-methyl is an derivative of Parathion (P192220), an organophosphate insecticide used on cotton, rice and fruit trees.
UsesInsecticide, especially for cotton.
DefinitionChEBI: A C-nitro compound that is 4-nitrophenol substituted by a (dimethoxyphosphorothioyl)oxy group at position 4.
General DescriptionMethyl parathion is a white crystalline solid dissolved in a liquid solvent carrier. The commercial product is a tan liquid (xylene solution) with a pungent odor. Parathion-methyl is slightly soluble to insoluble in water. Usually with the liquid solvent Parathion-methyl is a combustible liquid. Parathion-methyl is toxic by inhalation, ingestion and skin absorption. Parathion-methyl is used as an insecticide.
Air & Water ReactionsInsoluble in water.
Reactivity ProfileMETHYL PARATHION is half decomposed in 8 days at 40°C. When a sample was heated in a small test tube Parathion-methyl decomposed in a few minutes, the residue exploded (Food Chem. 4(1):42. 1956).
HazardExplosion risk when heated. Toxicby skin absorption, inhalation, and ingestion;cholinesterase inhibitor. Use has been restricted.Questionable carcinogen.
Health HazardParathion-methyl is extremely toxic; the probable oral lethal dose is 5-50 mg/kg, or between 7 drops and 1 teaspoonful for a 150-lb. person. Chronic toxicity does not appear to be a major consideration.
Fire HazardPoisonous gases are produced in fire and when heated. Decomposition may lead to sufficient internal pressure to cause the container to rupture violently. Avoid oxidizing materials. Unstable. High temperatures (120F) cause decomposition.
Agricultural UsesInsecticide, Nematicide: A U.S. EPA restricted Use Pesticide (RUP). Severely Restricted for use in EU, as parathion-methyl. This material is used as an insecticide on over 50 crops, primarily cotton, but also on walnuts, corn, dried beans and almonds and on several ornamentals. It is no longer allowed to be used on crops consumed by children.
Trade nameA-GRO®[C]; AI3-17292®; ATOMIC®[C]; AZOFOS®; AZOPHOS; BAMA BRAND®[C]; BAY 11405®; BAY E-601®; BLADAN M®; CEKUMETHION®; CLEAN CROP®[C]; COTTON TOX DUST®[C]; DALF®; DECLARE®; DEVITHION®; DREXEL METHYL PARATHION 4E®[C]; DURHAM[C]; E 601®; EMMY®[C]; E-Z-FLO®[C]; FALL OUT®[C]; FMC NYNAMITE®[C]; FOLIDOC®; FOLIDOL-80®; FOLIDOL M®; FOLIDOL M-40®; FOSFERNO M 50®; GEARPHOS®; 8056HC®; KILEX PARATHION®; ME-PARATHION®; MEPTOX®; METACID 50®; METACIDE®; METAFOS®; METAPHOS®; METRON®; METHYL-E 605®; METRON®; NITROX®; NITROX® 80; OLEOVOFOTOX®; PARAPEST M-50®; PENNCAP M®; PENNCAP MLS®; QUINOPHOS®; SEIS-TRES 6-3®; SINAFID M-48®; SIXTY-THREE SPECIAL E. C. INSECTICIDE®; TEKWAISA®; THIOPHENIT®; THYLPAR M-50®; TOLL®; VERTAC METHYL PARATHION TECHNISCH 80%®; WOFATOX 50 EC®
Contact allergensA case of sensitization to methyl-parathion was described in a female agricultural worker with multiple sensitization.
Safety ProfilePoison by inhalation, ingestion, skin contact, subcutaneous, intravenous, and intraperitoneal routes. Fatal poisoning can result from skin or eye contact after very brief exposure to concentrated solution. Experimental teratogenic and reproductive effects. Questionable carcinogen. Human mutation data reported. A cholinesterase inhibitor type of insecticide. When heated to decomposition it emits very toxic fumes of NOx, POx, and SOx.
Potential ExposureA severely hazardous pesticide formulation. Alert: This material is used as an insecticide on over 50 crops, primarily cotton, and on several ornamentals
First aidIf this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Speed in removing material from skin is of extreme importance. Shampoo hair promptly if contaminated. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Effects of exposure may be delayed. Medical monitoring is advised.
ShippingUN3017 Organophosphorus pesticides, liquid, toxic, flammable, flash point not ,23C, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 3.-Flammable liquid. UN2783 Organophosphorus pesticides, solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous material. UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1- Poisonous materials, Technical Name Required
IncompatibilitiesIncompatible with oxidizers, strong bases; heat. Mixtures with magnesium, or endrin may be violent or explosive. Slightly decomposed by acid solutions. Rapidly decomposed by alkalies. Explosive risk when heated above 50C. The liquid xylene solution decomposes violently @ 120C
Waste DisposalConsult with environmental regulatory agencies for guidance on acceptable disposal practices. Generators of waste containing this contaminant (≥100 kg/mo) must conform to EPA regulations governing storage, transportation, treatment, and waste disposal. Incineration (816C, 0.5 second minimum for primary combustion; 1204C, 1.0 second for secondary combustion) with adequate scrubbing and ash disposal facilities. 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
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