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demeton-S-methyl

Also known as: Demetox, Duratox, Metaisoseptox, Metaisosystox, Metasystox 55, Metasystox J, Methyl isosystox, Methylmercaptophos thiol, Methylthionodemeton, Methyldemetone, O,O-Dimethyl S-2-ethylthioethyl phosphorothioate, S-2-ethylthioethyl O,O-dimethyl phosphorothioate, S-[2-(ethylsulfanyl)ethyl] O,O-dimethyl phosphorothioate, S-[2-(ethylthio)ethyl] O,O-dimethyl phosphorothioate, Thiometon oxon

demeton-S-methyl (CAS 919-86-8) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C6H15O3PS2 and a molecular weight of 230.28500 g/mol. Key properties include a melting point of <25℃, a boiling point of 287.4ºC at 760 mmHg, a density of 1.197g/cm3 and a flash point of 2ºC. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H311 — Toxic in contact with skin and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.
919-86-8
Jingsj CID
J-11120-6
Molecular Formula
C6H15O3PS2
Molecular Weight
230.28500 g/mol
Category
Organic Compounds
Last updated
11/3/2026
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Physicochemical Properties

Melting Point<25℃
Boiling Point287.4ºC at 760 mmHg
Density1.197g/cm3
Flash Point2ºC
Exact Mass230.02000
PSA95.94000
LogP2.87360
Refractive Index1.496

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger
  • H301 — Toxic if swallowed
  • H311 — Toxic in contact with skin
  • H411 — Toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of demeton-S-methyl?

The CAS number of demeton-S-methyl is 919-86-8.

What are the molecular formula and molecular weight of demeton-S-methyl?

demeton-S-methyl has molecular formula C6H15O3PS2 and molecular weight 230.28500 g/mol.

Is demeton-S-methyl hazardous?

demeton-S-methyl has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H311 — Toxic in contact with skin; H411 — Toxic to aquatic life with long lasting effects.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "demeton-S-methyl (CAS 919-86-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11120-6 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.