O,O-Diethyl methylphosphonothioate
Also known as: Diethyl methylphosphonothioate, Methylphosphonothioic acid O,O-diethyl ester, Methylthiophosphonic acid O,O-diethyl ester, O,O-Diethyl methylphosphonothionate, MFCD00015875, diethoxy-methyl-sulfanylidene-λ5-phosphane
O,O-Diethyl methylphosphonothioate (CAS 6996-81-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C5H13O2PS and a molecular weight of 168.19400 g/mol. Key properties include a melting point of -84.3°C, a boiling point of 76-79ºC13 mm Hg(lit.), a density of 1.055 g/mL at 25ºC(lit.) and a flash point of 73.9 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.
- CAS No.
- 6996-81-2
- Jingsj CID
- J-1022-0
- Molecular Formula
- C5H13O2PS
- Molecular Weight
- 168.19400 g/mol
- Category
- Organic Acids
- Last updated
- 11/2/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -84.3°C |
|---|---|
| Boiling Point | 76-79ºC13 mm Hg(lit.) |
| Density | 1.055 g/mL at 25ºC(lit.) |
| Flash Point | 73.9 °C |
| Exact Mass | 168.03700 |
| PSA | 60.36000 |
| LogP | 2.64930 |
| Appearance | liquid |
| Refractive Index | n20/D 1.464(lit.) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
Frequently Asked Questions
What is the CAS number of O,O-Diethyl methylphosphonothioate?
The CAS number of O,O-Diethyl methylphosphonothioate is 6996-81-2.
What are the molecular formula and molecular weight of O,O-Diethyl methylphosphonothioate?
O,O-Diethyl methylphosphonothioate has molecular formula C5H13O2PS and molecular weight 168.19400 g/mol.
Is O,O-Diethyl methylphosphonothioate hazardous?
O,O-Diethyl methylphosphonothioate has GHS signal word Warning and hazard statements H302 — Harmful if swallowed.
What are the upstream and downstream products of O,O-Diethyl methylphosphonothioate?
For O,O-Diethyl methylphosphonothioate, Upstream Products: iodomethane, Sodium ethoxide, Methylphosphonothioic dichloride; Downstream Products: Diethyl methylphosphonate, O,S-Diethyl methylphosphonothioate.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "O,O-Diethyl methylphosphonothioate (CAS 6996-81-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1022-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.