甲基氧化脲

Description

oxydemeton-methyl · CAS 301-12-2 · C6H15O4PS2. UNII E2031449YZ. Boiling Point: 223 °F at 0.01 mmHg (NTP, 1992); Boiling Point: 106 °C @ 0.01 mm Hg; Melting Point: <-20 °C.

Identification

CAS Registry Number	301-12-2
PubChem CID	4618
Molecular formula	C6H15O4PS2
IUPAC name	1-dimethoxyphosphorylsulfanyl-2-ethylsulfinylethane
UNII (FDA)	E2031449YZ

Computed Descriptors

Molecular Weight	246.3
XLogP3	-0.7
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	7
Exact Mass	246.01493830
Monoisotopic Mass	246.01493830
Topological Polar Surface Area	97.1
Heavy Atom Count	13
Formal Charge	0

Physical & Chemical Properties

Boiling Point	223 °F at 0.01 mmHg (NTP, 1992)
Boiling Point	106 °C @ 0.01 mm Hg
Melting Point	<-20 °C
Solubility	10 to 50 mg/mL at 61 °F (NTP, 1992)
Density	1.289 g/cu cm @ 20 °C
Vapor Pressure	3.8e-05 millibar at 68 °F (NTP, 1992)
Vapor Pressure	0.0000285 [mmHg]
Vapor Pressure	3.8 mPa (2.85X10-5 mm Hg) @ 20 °C
LogP	log Kow = -0.74 @ 21 °C
LogP	-0.74

Physical description & handling notes

• Oxydemeton methyl is a clear amber liquid. (NTP, 1992)
• Colorless or yellow liquid; [HSDB] Clear amber liquid; [CAMEO]
• Colorless liquid
• Yellow oil
• less than 14 °F (NTP, 1992)
• less than 71 °F (NTP, 1992)

GHS Hazard Classification

Reported hazard statements	H301, H311, H400, H300, H310, H330, H341, H361

Documented Uses

• Used as systemic insecticide and acaricide for cotton, vegetables, fruits, and field crops; [HSDB]
• Systemic insecticide, acaricide, effective control by contact and systemic action of many destructive pests that attack certain vegetable, fruit and field crops. Primarily for aphids, mites, thrips, leafhoppers, and other sucking pests.
• Oxidation of o,o-dimethyl-s-(2-(ethylthio)ethyl) phosphorothioate
• Produced by oxidation of demeton-s-methyl...with hydrogen peroxide (West German patent 947,368) or with chlorine or bromine (West German patent 949,229)...
• About 30% as an insecticide or acaricide on cotton; about 30% as an insecticide or acaricide on deciduous fruits and nuts; and about 30% as an insecticide or acaricide on vegetables; and about 10% as an insecticide or acaricide on other field crops (1974)
• Introduced by Bayer AG...as code numbers Bayer 21097, R 2170, trade mark metasystox-r; oxydemeton-methyl is a systemic and contact insecticide suitable for control of sap-feeding insects and mites, with range of action similar to that of demeton-s-methyl of which it is metabolic product.

Synonyms

OXYDEMETON-METHYL; Demeton-S-methyl sulfoxide; 301-12-2; Oxydemeton methyl; Metasystox R; Metaisosystox sulfoxide; Metasystemox; Methyl oxydemeton S; Oxydemetonmethyl; Aimco systox; Metasystemox R; Metasytox R; Metilmercaptofosoksid; Metaisosystoxsulfoxide; Demeton-S methyl sulfoxide; Oxydemeton M

Frequently Asked Questions

What are the CAS number and molecular formula of oxydemeton-methyl?

CAS 301-12-2; molecular formula C6H15O4PS2; molecular weight — g/mol.

What other names is oxydemeton-methyl known by?

OXYDEMETON-METHYL, Demeton-S-methyl sulfoxide, 301-12-2, Oxydemeton methyl, Metasystox R, Metaisosystox sulfoxide.

Is oxydemeton-methyl classified as hazardous?

Hazard statements reported: H301, H311, H400, H300, H310.

What are the key physical properties of oxydemeton-methyl?

Boiling Point: 223 °F at 0.01 mmHg (NTP, 1992); Boiling Point: 106 °C @ 0.01 mm Hg; Melting Point: <-20 °C; Solubility: 10 to 50 mg/mL at 61 °F (NTP, 1992).

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.