Fenthion Sulfoxide

About Fenthion Sulfoxide

Fenthion Sulfoxide is an analytical reagent carrying the CAS registry number 3761-41-9. With the molecular formula C10H15O4PS2, it has a molar mass of 294.3 g/mol. Its systematic (IUPAC) name is dimethoxy-(3-methyl-4-methylsulfinylphenoxy)-sulfanylidene-lambda5-phosphane. Common synonyms include Fensulfoxide and Mesulfenfos [ISO].

Store sealed in a dry, well-ventilated location away from incompatible materials. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

Typical applications include agrochemical formulations and laboratory analysis. Buyers come mainly from academic and industrial research and agrochemical production.

We offer Fenthion Sulfoxide in 100 mg, 250 mg, 1 g and 5 g packs with a batch-specific COA, and ship to customers worldwide. A Safety Data Sheet (SDS) and technical specifications are available on request. Custom pack sizes, bulk quantities and specific analytical data can be arranged on request.

Typical applications

Agrochemical formulations
Laboratory analysis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Fenthion Sulfoxide
Catalogue No.	VQ-049929
CAS Number	3761-41-9
IUPAC name	dimethoxy-(3-methyl-4-methylsulfinylphenoxy)-sulfanylidene-lambda5-phosphane
Molecular formula	C₁₀H₁₅O₄PS₂
Molecular weight	294.3 g/mol
Exact mass	294.0149
InChIKey	DLAPIMGBBDILHJ-UHFFFAOYSA-N
SMILES	CC1=C(C=CC(=C1)OP(=S)(OC)OC)S(=O)C
PubChem CID	19577

Physical properties
Physical form	Other
LogP (XLogP3)	2.7
H-bond donors / acceptors	0 / 6
TPSA	96.1 Å²
Synonyms	Fensulfoxide, Mesulfenfos [ISO], Phosphorothioic acid, O,O-dimethyl O-(3-methyl-4-(methylsulfinyl)phenyl) ester, O,O-Dimethyl O-(4-(methylsulfinyl)-m-tolyl) phosphorothioate, O,O-Dimethyl O-((4-methylthio)-m-tolyl)phosphorothioate sulfoxide, Phosphorothioic acid, O,O-dimethyl O-(4-(methylsulfinyl)-m-tolyl) ester, Phosphorothioic acid, O,O-dimethyl O-[3-methyl-4-(methylsulfinyl)phenyl] ester, Phosphorothioic acid, O,O-dimethyl O-(3-methyl-4-(methylsulfinyl)phenyl) ester (9CI), Mesulfenfos, (+)-, Mesulfenfos, (R)-, Mesulfenfos, (S)-

Safety & hazard information (GHS)

Toxic

Signal word: Danger

Hazard statements

H301Toxic if swallowed

Precautionary statements: P264, P270, P301 + P316, P321, P330, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Fenthion Sulfoxide?

The CAS Registry Number of Fenthion Sulfoxide is 3761-41-9. It is also known as Fensulfoxide, Mesulfenfos [ISO], Phosphorothioic acid, O,O-dimethyl O-(3-methyl-4-(methylsulfinyl)phenyl) ester.

What is the molecular formula and molecular weight of Fenthion Sulfoxide?

Fenthion Sulfoxide has the molecular formula C10H15O4PS2 and a molecular weight of 294.3 g/mol. Its IUPAC name is dimethoxy-(3-methyl-4-methylsulfinylphenoxy)-sulfanylidene-lambda5-phosphane.

Which grade and pack sizes of Fenthion Sulfoxide can I order?

We supply Fenthion Sulfoxide, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Fenthion Sulfoxide?

Yes. Every lot of Fenthion Sulfoxide is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Fenthion Sulfoxide be shipped internationally?

Yes. Fenthion Sulfoxide is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.