Phosmet

Also known as: Imidan, PMP, Prolate, R-1504, Fosdan, Fosmet, Safidon, Smidan, Simidan, phthalophos, CEKUMET, INOVAT, Phosphorodithioic acid O,O-dimethyl S-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl] ester, S-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)methyl] O,O-dimethyl phosphorodithioate, 2-(dimethoxyphosphinothioylsulfanylmethyl)isoindole-1,3-dione, N-(dimethoxyphosphinothioylthiomethyl)phthalimide, N-(mercaptomethyl)phthalimide S-(O,O-dimethyl phosphorodithioate), MFCD00055501, EINECS 211-987-4

Phosmet (CAS 732-11-6) is a compound in the Organic Bases category listed in the Jingsj chemical database. It has the molecular formula C11H12NO4PS2 and a molecular weight of 317.321 g/mol. Key properties include a melting point of 72.5°C, a boiling point of 412.6±47.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 203.3±29.3 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H312 — Harmful in contact with skin and H330 — Fatal if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 732-11-6
Jingsj CID: J-8843-3
Molecular Formula: C₁₁H₁₂NO₄PS₂
Molecular Weight: 317.321 g/mol
Category: Organic Bases
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	72.5°C
Boiling Point	412.6±47.0 °C at 760 mmHg
Density	1.5±0.1 g/cm3
Flash Point	203.3±29.3 °C
Exact Mass	316.994537
PSA	123.04000
LogP	2.84
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.636

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger

H301 — Toxic if swallowed
H312 — Harmful in contact with skin
H330 — Fatal if inhaled
H410 — Very toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of Phosmet?

The CAS number of Phosmet is 732-11-6.

What are the molecular formula and molecular weight of Phosmet?

Phosmet has molecular formula C11H12NO4PS2 and molecular weight 317.321 g/mol.

Is Phosmet hazardous?

Phosmet has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H312 — Harmful in contact with skin; H330 — Fatal if inhaled.

What are the upstream and downstream products of Phosmet?

For Phosmet, Upstream Products: N-(Bromomethyl)phthalimide; Downstream Products: Phthalamic acid, Phthalic acid, Phosmet-oxon.

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

Last updated: 8/21/2026

How to cite: Jingsj. "Phosmet (CAS 732-11-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8843-3 (accessed 2026-11-06).

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