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Merck
CN

PS641

Oxydemeton-methyl

analytical standard

Synonym(s):

Demeton-S-methyl sulfoxide, S-[2-(Ethylsulfinyl)ethyl] O,O-dimethyl phosphorothioate, Methyl oxydemeton

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About This Item

Empirical Formula (Hill Notation):
C6H15O4PS2
CAS Number:
301-12-2
Molecular Weight:
246.28
EC Number:
206-110-7
UNSPSC Code:
41116107

Key Documents

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grade

analytical standard

packaging

ampule of 50 mg

manufacturer/tradename

Chem Service, Inc. PS-641

application(s)

agriculture
environmental

storage temp.

2-8°C

InChI

1S/C6H15O4PS2/c1-4-13(8)6-5-12-11(7,9-2)10-3/h4-6H2,1-3H3

InChI key

PMCVMORKVPSKHZ-UHFFFAOYSA-N

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General description

Oxydemeton-methyl is an organophosphorus pesticide primarily used for the control of pests in a wide variety of crops. Its mode of action involves the inhibition of cholinesterase enzyme activity.

Application

Oxydemeton-methyl may be used as a reference standard for the determination of oxydemeton-methyl in aqueous samples by direct injection using liquid chromatography coupled with tandem mass spectrometry.

Other Notes

This product has a 6 month shelf life from date of manufacture. We provide the newest lot available.

Pictograms

Skull and crossbonesEnvironment
GHS06,GHS09

Signal Word

Danger

Hazard Statements

H300 + H310,H400

Hazard Classifications

Acute Tox. 2 Dermal - Acute Tox. 2 Oral - Aquatic Acute 1

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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Certificates of Analysis (COA)

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M Perayre Badia et al.
Anales de medicina interna (Madrid, Spain : 1984), 24(3), 129-131 (2007-06-26)
Acute organophosphate poisoning leads to a cholinergic crisis secondary to an acetylcholine rise, developed by an acetylcholinesterase inhibition. In some cases, after the resolution of the initial cholinergic signs and symptoms, an intermediate syndrome occurs, characterized by a delayed development
A K Gottzein et al.
Forensic science international, 189(1-3), e21-e25 (2009-05-12)
A case of a combined suicide by oxydemeton-methyl (Metasystox) ingestion and hanging is reported. Dimethyl phosphate (DMP) proved to be a stable product of oxydemeton-methyl; for its determination a gas chromatographic/mass spectrometric procedure was performed. DMP levels were quantified in
F Worek et al.
Archives of toxicology, 73(1), 7-14 (1999-04-20)
Human poisoning by organophosphates bearing two methoxy groups, e.g. by malathion, paraoxon-methyl, dimethoate and oxydemeton-methyl, is generally considered to be rather resistant to oxime therapy. Since the oxime effectiveness is influenced not only by its reactivating potential but also by
Harald John et al.
Analytica chimica acta, 680(1-2), 32-40 (2010-10-26)
S-hyoscyamine (S-hyo) is a toxic tropane alkaloid from plants of the solanacea family, which is extracted for pharmaceutical purposes thereby undergoing racemization (atropine). Merely the S-hyo enantiomer acts as an antagonist of muscarinic receptors (MR). Nevertheless, racemic atropine is clinically
J Beike et al.
Journal of analytical toxicology, 26(5), 308-312 (2002-08-09)
A sensitive method for the identification and quantitation of the organophosphate insecticide oxydemeton-methyl and its metabolite demeton-S-methylsulfon from human blood and various tissue samples has been established. After solid-phase extraction using C18 cartridges the extracts were analyzed by high-performance liquid
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