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298-00-0

Supplier Related Products Identification Chemical Properties Hazard Information Safety Data Raw materials And Preparation Products Material Safety Data Sheet(MSDS) Well-known Reagent Company Product Information

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Identification

Name
Parathion-methyl
CAS
298-00-0
Synonyms
CEKUMETHION
DALF(R)
DANACAP(R)
DIMETHYL PARATHION
E601(R)
FOLIDOL-M
FOLIDOL-M(R)
METACIDE
METACIDE(R)
METHYL PARATHION
METRON(R)
MPT(R)
NITRAN
NITROX 80(R)
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
PARIDOL(R)
EINECS(EC#)
206-050-1
Molecular Formula
C8H10NO5PS
MDL Number
MFCD00041813
Molecular Weight
263.21
MOL File
298-00-0.mol

Chemical Properties

Appearance
Methyl parathion is a white to yellow-brown, crystalline solid with a garlic odor.
Appearance
white crystalline powder
Melting point 
36°C
mp 
36°C
Boiling point 
143°C (1.0 mmHg)
bp 
143°C (1.0 mmHg)
density 
1.36
refractive index 
nD25 1.5367
Fp 
46.1°C
storage temp. 
APPROX 4°C
form 
solid
Stability:
Stable. Flammable.
Water Solubility 
0.005 g/100 mL
Contact allergens
A case of sensitization to methyl-parathion was described in a female agricultural worker with multiple sensitization.
CAS DataBase Reference
298-00-0(CAS DataBase Reference)
NIST Chemistry Reference
Phosphorothioic acid, o,o-dimethyl-o-p-nitrophenyl ester(298-00-0)
EPA Substance Registry System
298-00-0(EPA Substance)

Hazard Information

Chemical Properties
white crystalline powder
Uses
Parathion-methyl is an derivative of Parathion (P192220), an organophosphate insecticide used on cotton, rice and fruit trees.
Definition
ChEBI: A C-nitro compound that is 4-nitrophenol substituted by a (dimethoxyphosphorothioyl)oxy group at position 4.
Uses
Insecticide.
General Description
Methyl 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. METHYL PARATHION, [LIQUID] is slightly soluble to insoluble in water. Usually with the liquid solvent METHYL PARATHION, [LIQUID] is a combustible liquid. METHYL PARATHION, [LIQUID] is toxic by inhalation, ingestion and skin absorption. METHYL PARATHION, [LIQUID] is used as an insecticide.
Reactivity Profile
METHYL PARATHION is half decomposed in 8 days at 40°C. When a sample was heated in a small test tube METHYL PARATHION, [LIQUID] decomposed in a few minutes, the residue exploded (Food Chem. 4(1):42. 1956).
Air & Water Reactions
Insoluble in water.
Hazard
Explosion risk when heated. Toxicby skin absorption, inhalation, and ingestion;cholinesterase inhibitor. Use has been restricted.Questionable carcinogen.
Health Hazard
This material 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.
Potential Exposure
A severely hazardous pesticide formulation. Alert: This material is used as an insecticide on over 50 crops, primarily cotton, and on several ornamentals
Fire Hazard
Poisonous 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.
First aid
If 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.
Shipping
UN3017 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
Incompatibilities
Incompatible 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 Disposal
Consult 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

Safety Data

Hazard Codes 
T+;N,N,T+,Xn,F
Risk Statements 
R5:Heating may cause an explosion.
R24:Toxic in contact with skin.
R26/28:Very Toxic by inhalation and if swallowed .
R48/22:Harmful: danger of serious damage to health by prolonged exposure if swallowed .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R10:Flammable.
R67:Vapors may cause drowsiness and dizziness.
R66:Repeated exposure may cause skin dryness or cracking.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R36:Irritating to the eyes.
R20/22:Harmful by inhalation and if swallowed .
R11:Highly Flammable.
R65:Harmful: May cause lung damage if swallowed.
R38:Irritating to the skin.
Safety Statements 
S28:After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer) .
S36/37:Wear suitable protective clothing and gloves .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S62:If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label .
RIDADR 
UN 2052/2783/2811
RTECS 
TG0175000
HazardClass 
6.1(a)
PackingGroup 
II
HS Code 
29201100
Safety Profile
Poison 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.
Hazardous Substances Data
298-00-0(Hazardous Substances Data)
Toxicity
LD50 in male, female rats (mg/kg): 14, 24 orally; 67, 67 dermally (Gaines)

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Well-known Reagent Company Product Information

Sigma Aldrich
298-00-0(sigmaaldrich)