甲基立枯磷

Description

Tolclofos-Methyl · CAS 57018-04-9 · C9H11Cl2O3PS. UNII G42OQL6F5B. Melting Point: 79-79.5 °C; Melting Point: MP: 75-80 °C; Flash Point: >100 °C (>212 °F).

Identification

CAS Registry Number	57018-04-9
PubChem CID	91664
Molecular formula	C9H11Cl2O3PS
IUPAC name	(2,6-dichloro-4-methylphenoxy)-dimethoxy-sulfanylidene-λ5-phosphane
UNII (FDA)	G42OQL6F5B

Computed Descriptors

Molecular Weight	301.13
XLogP3	4.7
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	4
Rotatable Bond Count	4
Exact Mass	299.9543578
Monoisotopic Mass	299.9543578
Topological Polar Surface Area	59.8
Heavy Atom Count	16
Formal Charge	0

Physical & Chemical Properties

Melting Point	79-79.5 °C
Melting Point	MP: 75-80 °C
Flash Point	>100 °C (>212 °F)
Solubility	In water, 1.10 mg/L at 15 °C
Solubility	In water, 0.3-0.4 ppm at 23 °C
Vapor Pressure	VP: 4.27X10-4 mm Hg at 20 °C
Vapor Pressure	4.30X10-4 mm Hg at 25 °C
LogP	log Kow = 4.56
LogP	4.36
Collision Cross Section	149.82 Ų [M+H]+

Physical description & handling notes

• White crystals from methanol
• Colorless crystals
• White cyrstalline solid
• In hexane 3.8%, exylene 36.0%, methanol 5.9%
• Soluble in common solvents such as acetone, xylene
• Easily soluble in xylene, acetone, cyclohexanone, chlorform

GHS Hazard Classification

Reported hazard statements	H317, H400, H410, H301, H311, H351, H361, H370

Documented Uses

• For control of soilborne diseases caused by Rhizoctonia, Sclerotium, and Typhula on bulbs, cereals, coffee, cotton, peanuts, potatoes, sugar beets, vegetables, ornamentals, turf, and lawns.
• ... Used as a seed treatment and a soil fungicide.
• Toclofos-methyl is produced by reaction of 2,6-dichloro-p-cresol with (O,O-dimethyl) chlorothiophosphate in the presence of a base.
• Preparation: T. Kato et al., Germany patent 2501040; United Kingdom patent 1467561 (1975, 1977 both to Sumitomo).
• Male and female ICR mice, eight weeks of age, were given an oral dose of 5 mg/kg bw of [(14)C-4-methyl]-tolclofos-methyl (radiochemical purity, 99%) dissolved in corn oil, and radiocarbon was monitored in urine, feces and expired air for seven days after administration. Within 24 hr, 69-76% of the administered radiolabel was excreted in the urine, 4-6% in the feces and less than 1% in the expired air. Total radiocarbon residues in the whole body represented less than 1% of the dose seven days after administration.
• In male and female rats with bile-duct cannulas, cumulative excretion of (14)C over 48 hr was 5.8-12% of the dose in bile, 47-59% in urine and 42-24% in feces.

Synonyms

Tolclofos-methyl; 57018-04-9; Rizolex; Risolex; o-(2,6-Dichloro-4-methylphenyl) o,o-dimethyl phosphorothioate; Toclofos-methyl; S-3349; DTXSID0034776; O-2,6-Dichloro-p-tolyl O,O-dimethyl phosphorothioate; G42OQL6F5B; Phosphorothioic acid, O-(2,6-dichloro-4-methylphenyl) O,O-dimethyl ester; O-(2,6-Dichloro-p-tolyl) O,O-dimethyl thiophosphate; DTXCID8014776; CHEBI:81731; O,O-Dimethyl O-(2,6-dichloro-4-methylphenyl)phosphorothioate; O-(2,6-Dichloro-p-tolyl) O,O-dimethyl ester of phosphorothioic acid

Frequently Asked Questions

What are the CAS number and molecular formula of Tolclofos-Methyl?

CAS 57018-04-9; molecular formula C9H11Cl2O3PS; molecular weight — g/mol.

What other names is Tolclofos-Methyl known by?

Tolclofos-methyl, 57018-04-9, Rizolex, Risolex, o-(2,6-Dichloro-4-methylphenyl) o,o-dimethyl phosphorothioate, Toclofos-methyl.

Is Tolclofos-Methyl classified as hazardous?

Hazard statements reported: H317, H400, H410, H301, H311.

What are the key physical properties of Tolclofos-Methyl?

Melting Point: 79-79.5 °C; Melting Point: MP: 75-80 °C; Flash Point: >100 °C (>212 °F); Solubility: In water, 1.10 mg/L at 15 °C.

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.