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Description

Temephos · CAS 3383-96-8 · C16H20O6P2S3. UNII ONP3ME32DL. Melting Point: 87 °F (NIOSH, 2024); Melting Point: 30.0-30.5 °C; Melting Point: 30 °C.

Identification

CAS Registry Number	3383-96-8
PubChem CID	5392
Molecular formula	C16H20O6P2S3
IUPAC name	[4-(4-dimethoxyphosphinothioyloxyphenyl)sulfanylphenoxy]-dimethoxy-sulfanylidene-λ5-phosphane
UNII (FDA)	ONP3ME32DL

Computed Descriptors

Molecular Weight	466.5
XLogP3	6
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	10
Exact Mass	465.98972587
Monoisotopic Mass	465.98972587
Topological Polar Surface Area	145
Heavy Atom Count	27
Formal Charge	0

Physical & Chemical Properties

Melting Point	87 °F (NIOSH, 2024)
Melting Point	30.0-30.5 °C
Melting Point	30 °C
Melting Point	87 °F
Solubility	In hexane, 9.6 g/L
Solubility	In water, 0.27 mg/L at 25 °C
Density	1.3 g/cu cm
Density	1.3 g/cm³
Density	1.32
Vapor Pressure	7e-08 mmHg at 77 °F (NIOSH, 2024)

Physical description & handling notes

• Temephos appears as white crystalline solid or liquid (above 87 °F). Used as an insecticide. Technical grade is a viscous brown liquid. (NIOSH, 2024)
• White, crystalline solid or liquid (above 87 degrees F). [insecticide] [Note: Technical grade is a viscous, brown liquid.]; [NIOSH]
• COLOURLESS OR WHITE CRYSTALS OR LIQUID.
• White, crystalline solid or liquid (above 87 °F).
• White, crystalline solid or liquid (above 87 °F). [insecticide] [Note: Technical grade is a viscous, brown liquid.]
• Colorless crystals

GHS Hazard Classification

Reported hazard statements	H302 (61.5%), H311 (57.7%), H312 (39.7%), H332 (42.3%), H372 (35.9%), H400 (96.2%), H410 (47.4%), H320

Documented Uses

• Used to kill mosquito, midge, and black fly larvae in lakes, ponds, and wetlands; also used to kill fleas and human lice; [EXTOXNET]
• Larvicide for mosquitoes, black flies, and midges and in other applications.
• Effective in controlling fleas on dogs and cats and lice on humans. On crops, it is effective in controlling cutworms, thrips on citrus, and lygus bugs.
• Control of "river blindness" (onchoceraiasis) ... by killing the insect vector (black fly) carrying filaria of this disease.
• For more Uses (Complete) data for TEMEPHOS (6 total), please visit the HSDB record page.
• Reaction of 4,4'-thiodiphenol and o,o-dimethyl phosphorochloridothioate

Synonyms

temephos; Temefos; 3383-96-8; ABATE; Difos; Difenphos; Abathion; Biothion; Procida; Nephis; Bithion; Nephis 1G; Nimitex; Nimitox; Swebate; Ecopro 1707

Frequently Asked Questions

What are the CAS number and molecular formula of Temephos?

CAS 3383-96-8; molecular formula C16H20O6P2S3; molecular weight — g/mol.

What other names is Temephos known by?

temephos, Temefos, 3383-96-8, ABATE, Difos, Difenphos.

Is Temephos classified as hazardous?

Hazard statements reported: H302, H311, H312, H332, H372.

What are the key physical properties of Temephos?

Melting Point: 87 °F (NIOSH, 2024); Melting Point: 30.0-30.5 °C; Melting Point: 30 °C; Melting Point: 87 °F.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.