Methylmercaptophos oxide

Modify Date: 2026-07-02 10:26:26

Methylmercaptophos oxide structure	Common Name	Methylmercaptophos oxide
	CAS Number	301-12-2	Molecular Weight	246.285
	Density	1.3±0.1 g/cm3	Boiling Point	377.6±44.0 °C at 760 mmHg
	Molecular Formula	C₆H₁₅O₄PS₂	Melting Point	<-20ºC
	MSDS	Chinese	Flash Point	182.2±28.4 °C
	Symbol	GHS06, GHS09	Signal Word	Danger

This table lists Chinese names, IUPAC names and various aliases of this chemical substance.

Name	oxydemeton-methyl
Synonym	More Synonyms

This table shows physicochemical parameters including melting point, boiling point, density, solubility and optical rotation. Missing data is marked as N/A.

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
InChIKey	PMCVMORKVPSKHZ-UHFFFAOYSA-N
SMILES	CCS(=O)CCSP(=O)(OC)OC
Storage condition	0-6°C

This table provides MSDS information including hazard classification, first‑aid, fire‑fighting, spill handling, operation and storage instructions.

Methylmercaptophos oxide MSDS(Chinese)

This table summarizes toxicological test data, acute & chronic toxicity and ecological hazard parameters for this chemical.

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)

This table covers safety warnings, protective measures, incompatible substances and disposal guidelines for this compound.

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

This table presents publicly reported synthetic routes, reaction conditions, reactants and product information of the compound.

demeton-S-methyl

CAS#:919-86-8

Methylmercaptop...

CAS#:301-12-2

Learn More

Literature: DE947368 , ;

This table lists upstream starting materials and downstream derivative products related to this chemical.

Precursor 1
CAS#:919-86-8 demeton-S-methyl
DownStream 1
CAS#:17040-19-6 Demeton-s-methy...

This table shows customs‑related data including HS‑code, tariff and regulatory conditions for import and export.

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%

This table lists relevant public references with title, journal and publication metadata for this compound.

Investigation on diazinon and oxydemeton-methyl residues in cucumbers grown in Kerman greenhouses.

Environ. Monit. Assess. 186(7) , 3995-9, (2014)

Pesticides are considered as the most polluting substances. The residue of pesticides in agricultural crops, especially in greenhouse harvests, has been reported critical. Cucumber, considered as a ve...

Determination of polar organophosphorus pesticides in water samples by hydrophilic interaction liquid chromatography with tandem mass spectrometry.

Rapid Commun. Mass Spectrom. 22(14) , 2203-10, (2008)

A method combining hydrophilic interaction liquid chromatography (HILIC) with tandem mass spectrometry (MS/MS) was developed for the determination of polar organophosphorus pesticides (OPPs; acephate,...

Committee on Pesticides and Disinfectant Formulations. Pesticide formulations: CIPAC studies. Collaborative International Pesticide Analytical Council.

J. AOAC Int. 85(1) , 249-51, (2002)

This table contains target information, in‑vitro & in‑vivo assay data for this compound.

Name: qHTS assay for small molecule agonists of the antioxidant response element (ARE) sign...
Source: NCGC
Target: N/A
External Id: ARE853

Name: qHTS assay for small molecule agonists of retinoid X receptor alpha signaling
Source: NCGC
Target: retinoid X nuclear receptor alpha [Homo sapiens]
External Id: RXRA10

Name: qHTS for Inhibitors of human tyrosyl-DNA phosphodiesterase 1 (TDP1): qHTS in cells in...
Source: NCGC
Target: TDP1 protein [Homo sapiens]
External Id: TDP1100

Name: qHTS assay for small molecule agonists of thyroid hormone receptor beta signaling
Source: NCGC
Target: thyroid hormone receptor beta [Homo sapiens]
External Id: TRBA10

Name: qHTS for Stage-Specific Inhibitors of Vaccinia Orthopoxvirus: mCherry Reporter Primar...
Source: NCGC
Target: 67.9K protein [Vaccinia virus]
External Id: Vaccinia-p2mCherry

Name: qHTS for Inhibitors of human tyrosyl-DNA phosphodiesterase 1 (TDP1): qHTS in cells in...
Source: NCGC
Target: TDP1 protein [Homo sapiens]
External Id: TDP1101

Name: qHTS assay for small molecule antagonists of retinoid X receptor alpha signaling
Source: NCGC
Target: retinoid X nuclear receptor alpha [Homo sapiens]
External Id: RXRN10

Name: qHTS assay for small molecule antagonists of thyroid hormone receptor beta signaling
Source: NCGC
Target: thyroid hormone receptor beta [Homo sapiens]
External Id: TRBN10

Name: Inhibition of sodium fluorescein uptake in OATP1B3-transfected CHO cells at an equimo...
Source: ChEMBL
Target: Solute carrier organic anion transporter family member 1B3
External Id: CHEMBL3039491

Name: The chemical genetic matrix (CGM) dataset as reported in Wildenhain et al. (2015) Pre...
Source: 11924
Target: N/A
External Id: CGM data for Cell Systems paper Dec 2015

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This table collects all English aliases, systematic names and CAS‑related synonyms of the compound.

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

This section contains frequently‑asked‑questions about this compound, including basic parameters, properties, storage conditions and corresponding answers.

Q: What is the boiling point of oxydemeton-methyl?

A: Boiling point of oxydemeton-methyl is 377.6±44.0 °C at 760 mmHg.

Q: What is the SMILES notation of oxydemeton-methyl?

A: SMILES notation of oxydemeton-methyl is CCS(=O)CCSP(=O)(OC)OC.

Q: What is the molecular formula of oxydemeton-methyl?

A: Molecular formula of oxydemeton-methyl is C6H15O4PS2.

Q: What is the English name of oxydemeton-methyl?

A: The English name of oxydemeton-methyl is oxydemeton-methyl.

Q: What is the LogP of oxydemeton-methyl?

A: LogP of oxydemeton-methyl is -0.74.

Q: What is the CAS number of oxydemeton-methyl?

A: CAS number of oxydemeton-methyl is 301-12-2.

Q: What are the upstream materials of oxydemeton-methyl?

A: Related upstream materials(CAS) of oxydemeton-methyl: 919-86-8.

Q: What is the safety information for oxydemeton-methyl?

A: Safety information for oxydemeton-methyl: S23-S36/37-S45-S61.

Q: What are the downstream products of oxydemeton-methyl?

A: Related downstream products(CAS) of oxydemeton-methyl: 17040-19-6.

Q: What is the InChIKey of oxydemeton-methyl?

A: InChIKey of oxydemeton-methyl is PMCVMORKVPSKHZ-UHFFFAOYSA-N.

This table lists manufacturers and suppliers of this compound, including vendor names and product supply reference information.

Shanghai Nianxing Industrial Co., Ltd

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Methylmercaptophos oxide

Names

Chemical & Physical Properties

MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

Safety Information

Synthetic Route

Precursor & DownStream

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Methylmercaptophos oxideBioassay

Synonyms

Methylmercaptophos oxide | FAQ

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