301-12-2

301-12-2 structure

Name: Methylmercaptophos oxide
Chemical Name: oxydemeton-methyl
CAS Number: 301-12-2
Molecular Formula: C₆H₁₅O₄PS₂
Molecular Weight: 246.285
Catalog: Chemical pesticide Insecticide Organophosphorus pesticide
Create Date: 2018-04-06 08:00:00
Modify Date: 2025-08-20 23:36:55

Name	oxydemeton-methyl
Synonyms	Oxydemetonmethyl EINECS 206-110-7 Metaisosystox sulfoxide Metasystemox R thiophosphoric acid S-(2-ethanesulfinyl-ethyl) ester O,O'-dimethyl ester Methylmercaptophos oxide Demeton-O-methyl sulfoxide Methyl demeton-O-sulfoxide O,O-dimethyl S-<2-(ethylsulfinyl)ethyl>phosphorothioate S-[2-(Ethylsulfinyl)ethyl] O,O-dimethyl phosphorothioate S-2-Ethylsulfinylethyl O,O-dimethyl phosphorothioate Metasystox-R OS2&2SPO&O1&O1 Aimco systox Phosphorothioic acid, S-[2-(ethylsulfinyl)ethyl] O,O-dimethyl ester Methyl oxydemeton S Metasystemox S-[2-(ethanesulfinyl)ethyl] O,O-dimethyl phosphorothioate PO-methylsystox-sulfoxide S-[2-(Ethylsulfinyl)ethyl]-O,O-dimethylthiophosphat 1-dimethoxyphosphorylsulfanyl-2-ethylsulfinylethane

Density	1.3±0.1 g/cm3
Boiling Point	377.6±44.0 °C at 760 mmHg
Melting Point	<-20ºC
Molecular Formula	C₆H₁₅O₄PS₂
Molecular Weight	246.285
Flash Point	182.2±28.4 °C
Exact Mass	246.014938
PSA	106.92000
LogP	-0.74
Vapour Pressure	0.0±0.8 mmHg at 25°C
Index of Refraction	1.519
Storage condition	0-6°C

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TG1420000

CHEMICAL NAME :: Phosphorothioic acid, S-(2-(ethylsulfinyl)ethyl) O,O-dimethyl ester

CAS REGISTRY NUMBER :: 301-12-2

BEILSTEIN REFERENCE NO. :: 1711268

LAST UPDATED :: 199612

DATA ITEMS CITED :: 30

MOLECULAR FORMULA :: C6-H15-O4-P-S2

MOLECULAR WEIGHT :: 246.30

WISWESSER LINE NOTATION :: OS2&2SPO&O1&O1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 30 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 1500 mg/m3/1H

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 100 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 20 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 47 mg/kg

TOXIC EFFECTS :: Behavioral - general anesthetic Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - other esterases

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 65 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 10 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 8 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 120 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 30 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - pigeon

DOSE/DURATION :: 15 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - chicken

DOSE/DURATION :: 80 mg/kg

TOXIC EFFECTS :: Behavioral - somnolence (general depressed activity) Behavioral - convulsions or effect on seizure threshold

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - quail

DOSE/DURATION :: 84 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - duck

DOSE/DURATION :: 54 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - wild bird species

DOSE/DURATION :: 42 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Bird - chicken

DOSE/DURATION :: 490 mg/kg/1W-C

TOXIC EFFECTS :: Nutritional and Gross Metabolic - weight loss or decreased weight gain

TYPE OF TEST :: Sex chromosome loss and nondisjunction

TYPE OF TEST :: Micronucleus test

TYPE OF TEST :: Cytogenetic analysis

TYPE OF TEST :: Micronucleus test

MUTATION DATA

TYPE OF TEST :: Sister chromatid exchange

TEST SYSTEM :: Rodent - hamster Lung

DOSE/DURATION :: 40 mg/L

REFERENCE :: ENMUDM Environmental Mutagenesis. (New York, NY) V.1-9, 1979-87. For publisher information, see EMMUEG. Volume(issue)/page/year: 4,621,1982 *** REVIEWS *** TOXICOLOGY REVIEW RREVAH Residue Reviews. (Springer-Verlag New York, Inc., Service Center, 44 Hartz Way, Secaucus, NJ 07094) V.1- 1962- Volume(issue)/page/year: 63,1,1976 *** U.S. STANDARDS AND REGULATIONS *** EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION FEREAC Federal Register. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year: 54,7740,1989 *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 83049 No. of Facilities: 110 (estimated) No. of Industries: 2 No. of Occupations: 2 No. of Employees: 254 (estimated)

Symbol	GHS06, GHS09
Signal Word	Danger
Hazard Statements	H301 + H311-H400
Precautionary Statements	P273-P280-P301 + P310-P312
Hazard Codes	T: Toxic;N: Dangerous for the environment;
Risk Phrases	24/25-50
Safety Phrases	S23-S36/37-S45-S61
RIDADR	UN 2810 6.1/PG 2
RTECS	TG1420000
Packaging Group	II
HS Code	2930909061

919-86-8

301-12-2

Literature: DE947368 , ;

Precursor 1
919-86-8
DownStream 1
17040-19-6

HS Code	2930909061
Summary	2930909061 o,o,o',o'-tetramethyl o,o'-(thiobis(4,1-phenylene)) diphosphorothioate。supervision conditions:s(import or export registration certificate for pesticides)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:6.5%。general tariff:30.0%

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