Methidathion

Modify Date: 2026-07-01 12:38:04

Methidathion structure	Common Name	Methidathion
	CAS Number	950-37-8	Molecular Weight	302.331
	Density	1.6±0.1 g/cm3	Boiling Point	347.7±52.0 °C at 760 mmHg
	Molecular Formula	C₆H₁₁N₂O₄PS₃	Melting Point	39-40°C
	MSDS	Chinese USA	Flash Point	164.1±30.7 °C
	Symbol	GHS05, GHS06, GHS09	Signal Word	Danger

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

Name	methidathion
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	1.6±0.1 g/cm3
Boiling Point	347.7±52.0 °C at 760 mmHg
Melting Point	39-40°C
Molecular Formula	C₆H₁₁N₂O₄PS₃
Molecular Weight	302.331
Flash Point	164.1±30.7 °C
Exact Mass	301.961853
PSA	158.02000
LogP	2.03
Vapour Pressure	0.0±0.8 mmHg at 25°C
Index of Refraction	1.652
InChIKey	MEBQXILRKZHVCX-UHFFFAOYSA-N
SMILES	COc1nn(CSP(=S)(OC)OC)c(=O)s1
Storage condition	0-6°C
Water Solubility	0.024 g/100 mL

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

Methidathion MSDS(Chinese)

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

CHEMICAL IDENTIFICATION

RTECS NUMBER :: TE2100000

CHEMICAL NAME :: Phosphorodithioic acid, O,O-dimethyl ester, S-ester with 4-(mercaptomethyl)-2-methoxy- delta(sup 2)-1,3,4-thiadiazolin-5-one

CAS REGISTRY NUMBER :: 950-37-8

LAST UPDATED :: 199706

DATA ITEMS CITED :: 20

MOLECULAR FORMULA :: C6-H11-N2-O4-P-S3

MOLECULAR WEIGHT :: 302.34

WISWESSER LINE NOTATION :: T5NNVSJ B1SPS&O1&O1 EO1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: Standard Draize test

ROUTE OF EXPOSURE :: Administration into the eye

SPECIES OBSERVED :: Rodent - rabbit

REFERENCE :: CIGET* Ciba-Geigy Toxicology Data/Indexes. (Ciba-Geigy Corp., 556 Morris Ave., Summit, NJ 07901) ** ACUTE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Human - man

DOSE/DURATION :: 93 mg/kg

TOXIC EFFECTS :: Sense Organs and Special Senses (Eye) - miosis (pupillary constriction) Sense Organs and Special Senses (Eye) - lacrimation Behavioral - coma

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

ROUTE OF EXPOSURE :: Oral

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 :: LC50 - Lethal concentration, 50 percent kill

ROUTE OF EXPOSURE :: Inhalation

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 50 mg/m3/4H

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

REFERENCE :: CIGET* Ciba-Geigy Toxicology Data/Indexes. (Ciba-Geigy Corp., 556 Morris Ave., Summit, NJ 07901)

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

ROUTE OF EXPOSURE :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 25 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 :: 25 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 - rabbit

DOSE/DURATION :: 63 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 :: Administration onto the skin

SPECIES OBSERVED :: Rodent - rabbit

DOSE/DURATION :: 196 mg/kg

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

REFERENCE :: CIGET* Ciba-Geigy Toxicology Data/Indexes. (Ciba-Geigy Corp., 556 Morris Ave., Summit, NJ 07901)

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

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - guinea pig

DOSE/DURATION :: 25 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 :: 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 :: Mammal - species unspecified

DOSE/DURATION :: 25 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 :: Unreported

SPECIES OBSERVED :: Mammal - species unspecified

DOSE/DURATION :: 25 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 :: Rodent - rat

DOSE/DURATION :: 225 mg/kg/9W-I

TOXIC EFFECTS :: Endocrine - changes in spleen weight Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Related to Chronic Data - death

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Mammal - dog

DOSE/DURATION :: 17155 mg/kg/1Y-I

TOXIC EFFECTS :: Liver - jaundice, cholestatic Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - true cholinesterase Biochemical - Enzyme inhibition, induction, or change in blood or tissue levels - multiple enzyme effects

MUTATION DATA

TYPE OF TEST :: Sister chromatid exchange

TEST SYSTEM :: Rodent - hamster Lung

DOSE/DURATION :: 40 mg/L

REFERENCE :: MUREAV Mutation Research. (Elsevier Science Pub. B.V., POB 211, 1000 AE Amsterdam, Netherlands) V.1- 1964- Volume(issue)/page/year: 88,307,1981 *** 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: 46,1,1973 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 : NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - X2166 No. of Facilities: 13 (estimated) No. of Industries: 1 No. of Occupations: 1 No. of Employees: 26 (estimated)

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

Symbol	GHS05, GHS06, GHS09
Signal Word	Danger
Hazard Statements	H300 + H310 + H330-H318-H410
Precautionary Statements	P260-P264-P273-P280-P284-P301 + P310
Personal Protective Equipment	dust mask type N95 (US);Eyeshields;Faceshields;Gloves;type P2 (EN 143) respirator cartridges
Hazard Codes	T+:Verytoxic;N:Dangerous for the environment;
Risk Phrases	R21;R28;R50/53
Safety Phrases	S22-S28-S36/37-S45-S60-S61
RIDADR	UN 2811
RTECS	TE2100000
Packaging Group	II
Hazard Class	6.1(a)

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

Formaldehyde

CAS#:50-00-0

2-METHANESULFON...

CAS#:17605-27-5

O,O-DIMETHYLPHO...

CAS#:16001-68-6

Methidathion

CAS#:950-37-8

Learn More

Literature: Helvetica chimica acta, , vol. 51, # 3 p. 518 - 526

Formaldehyde

CAS#:50-00-0

2-METHANESULFON...

CAS#:17605-27-5

Dimethylphospho...

CAS#:756-80-9

Methidathion

CAS#:950-37-8

Learn More

Literature: Helvetica Chimica Acta, , vol. 57, p. 1658 - 1675

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

Precursor 4
CAS#:50-00-0 Formaldehyde CAS#:17605-27-5 2-METHANESULFON... CAS#:16001-68-6 O,O-DIMETHYLPHO... CAS#:756-80-9 Dimethylphospho...
DownStream 0

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

Comparative toxicity of methidathion and glyphosate on early life stages of three amphibian species: Pelophylax ridibundus, Pseudepidalea viridis, and Xenopus laevis.

Aquat. Toxicol. 140-141 , 220-8, (2013)

The assessments of pesticide toxicity on nontarget organisms have largely been focused on the determination of median lethal concentration (LC50) values using single/laboratory species. Although usefu...

Fast agitated directly suspended droplet microextraction technique for the rapid analysis of eighteen organophosphorus pesticides in human blood.

J. Chromatogr. A. 1377 , 27-34, (2015)

A new sample preparation technique named as fast agitated directly suspended droplet microextraction (FA-DSDME) was proposed as an improved version of directly suspended droplet microextraction (DSDME...

Development of a more specific and accurate multiple reaction monitoring method based on GC-EI/MS/MS for simultaneously monitoring and determining 34 kinds of pesticides in Qianjinzhidai pills.

J. Chromatogr. B. Analyt. Technol. Biomed. Life Sci. 983-984 , 47-54, (2015)

A rapid and accurate multi-residue method was developed for simultaneously monitoring and determining 34 kinds of pesticides by GC-EI/MS/MS, successfully applied in Qianjinzhidai pills. Precision, rep...

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

Name: Primary qHTS assay for inhibitors of alpha-synuclein gene (SNCA) expression
Source: NCGC
External Id: SNCA-p-activity-luciferase

Name: Cytochrome P450 Family 1 Subfamily A Member 2 (CYP1A2) small molecule antagonists: lu...
Source: 824
External Id: CYP273

Name: p53 small molecule agonists, cell-based qHTS assay: qHTS cell viability counter scree...
Source: 824
Target: N/A
External Id: P53600

Name: p53 small molecule agonists, cell-based qHTS assay with rat liver microsomes: qHTS ce...
Source: 824
Target: N/A
External Id: P53MS958

Name: p53 small molecule agonists, cell-based qHTS assay with rat liver microsomes: Summary
Source: 824
External Id: P53MS482

Name: p53 small molecule agonists, cell-based qHTS assay
Source: 824
External Id: P53344

Name: p53 small molecule agonists, cell-based qHTS assay with human liver microsomes
Source: 824
Target: tumor suppressor p53 [Homo sapiens]
External Id: P53MS233

Name: p53 small molecule agonists, cell-based qHTS assay with human liver microsomes: qHTS ...
Source: 824
Target: N/A
External Id: P53MS837

Name: p53 small molecule agonists, cell-based qHTS assay with rat liver microsomes
Source: 824
Target: tumor suppressor p53 [Homo sapiens]
External Id: P53MS898

Name: Primary qHTS to identify gynecologic anti-cancer compounds using libraries of approve...
Source: NCGC
Target: N/A
External Id: OBG420

Total 279, Current Page 1 of 28

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

faat

Phosphorodithioic Acid S-[(5-Methoxy-2-oxo-1,3,4-thiadiazol-3(2H)-yl)methyl]O,O-Dimethyl Ester

Phosphorodithioic acid, S-[(5-methoxy-2-oxo-1,3,4-thiadiazol-3(2H)-yl)methyl] O,O-dimethyl ester

S-((5-methoxy-2-oxo-1,3,4-thiadiazol-3(2H)-yl)methyl) O,O-dimethyl phosphorodithioate

Dithiophosphoric Acid O,O'-Dimethyl-S-[(2-methoxy-1,3,4-thiadiazol-5(4H)-on-4-yl)methyl] Ester

Geigy GS 13005

S-[(5-Methoxy-2-oxo-1,3,4-thiadiazol-3(2H)-yl)methyl] O,O-dimethyl phosphorodithioate

sphat

NC2964

oms844

O,O'-Dimethyl-S-[(2-methoxy-1,3,4-thiadiazole-5(4H)-one-4-yl)methyl] Dithiophosphate

S-2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl O,O-dimethyl phosphorodithioate

3-dimethoxyphosphinothioylthiomethyl-5-methoxy-1,3,4-thiadiazol-2(3H)-one

Methadithion

dmtp

Phosphorodithioic Acid O,O-Dimethyl Ester S-Ester with 4-(Mercaptomethyl)-2-methoxy-D2-1,3,4-thiadiazolin-5-one

Somonil

O,O-dimethyl S-(2,3-dihydro-5-methoxy-2-oxo-1,3,4-thiadiazol-3-ylmethyl)phosphorodithioate

S-[(5-Methoxy-2-oxo-1,3,4-thiadiazol-3(2H)-yl)methyl]-O,O-dimethyldithiophosphat

Dithiophosphoric acid O,O'-dimethyl-S-[(5-methoxy-1,3,4-thiadiazol-2(3H)-one-3-yl)methyl] ester

hionate

MFCD00055286

Methidathion

T5NNVSJ B1SPS&O1&O1 EO1

EINECS 213-449-4

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

Q: What is the polar surface area (PSA) of methidathion?

A: Polar surface area (PSA) of methidathion is 158.02000.

Q: What are the upstream materials of methidathion?

A: Related upstream materials(CAS) of methidathion: 50-00-0;17605-27-5;16001-68-6;756-80-9.

Q: What is the molecular weight of methidathion?

A: Molecular weight of methidathion is 302.331.

Q: What is the molecular formula of methidathion?

A: Molecular formula of methidathion is C6H11N2O4PS3.

Q: What is the melting point of methidathion?

A: Melting point of methidathion is 39-40°C.

Q: What is the CAS number of methidathion?

A: CAS number of methidathion is 950-37-8.

Q: How is the water solubility of methidathion?

A: Water solubility of methidathion: 0.024 g/100 mL.

Q: What is the SMILES notation of methidathion?

A: SMILES notation of methidathion is COc1nn(CSP(=S)(OC)OC)c(=O)s1.

Q: What is the InChIKey of methidathion?

A: InChIKey of methidathion is MEBQXILRKZHVCX-UHFFFAOYSA-N.

Q: What are the storage conditions for methidathion?

A: Storage conditions for methidathion: 0-6°C.

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

Shanghai Nianxing Industrial Co., Ltd

Dayang Chem (Hangzhou) Co., Ltd.

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Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Methidathion
Price: Check
Purity: 98.0%
Delivery: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Methidathion
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Delivery: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

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Methidathion

Names

Chemical & Physical Properties

MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

Safety Information

Synthetic Route

Precursor & DownStream

Articles28

MethidathionBioassay

Synonyms

Methidathion | FAQ

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