Pirimiphos-ethyl

Also known as: O-[2-(Diethylamino)-6-methylpyrimidin-4-yl] O,O-diethyl phosphorothioate, Diethyl O-(2-(diethylamino)-6-methyl-4-pyrimidinyl) phosphorothioate, Phosphorothioic acid O-[2-(diethylamino)-6-methyl-4-pyrimidinyl] O,O-diethyl ester, Primicid, Primotec, Solgard, Fernex, PP211, Pirimifos-ethyl, Pirimphos-ethyl, O-2-diethylamino-6-methylpyrimidin-4-yl O,O-diethyl phosphorothioate, O-[2-(Diethylamino)-6-methyl-4-pyrimidinyl] O,O-diethyl thiophosphate, O,O-Diethyl O-[2-(Diethylamino)-6-methyl-4-pyrimidinyl]phosphorothioate, Pirimiphos ethyl, Pirimiphos-ethyl [ISO], AI3-27698, UNII-3L26N84757, EINECS 245-704-0, Caswell No. 334A

Pirimiphos-ethyl (CAS 23505-41-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C13H24N3O3PS and a molecular weight of 333.387 g/mol. Key properties include a boiling point of 414.1±55.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 204.2±31.5 °C. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H312 — Harmful in contact with skin and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 23505-41-1
Jingsj CID: J-29837-9
Molecular Formula: C₁₃H₂₄N₃O₃PS
Molecular Weight: 333.387 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	414.1±55.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	204.2±31.5 °C
Exact Mass	333.127594
PSA	98.61000
LogP	5.06
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.545

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger

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

Customs & Trade Information

HS Code	2933599011
Summary	2933599011 o-(2-(diethylamino)-6-methylpyrimidin-4-yl) o,o-dimethyl phosphorothioate。supervision conditions:s(import or export registration certificate for pesticides)。VAT:17.0%。tax rebate rate:9.0%。MFN tarrif:6.5%。general tariff:20.0%

Frequently Asked Questions

What is the CAS number of Pirimiphos-ethyl?

The CAS number of Pirimiphos-ethyl is 23505-41-1.

What are the molecular formula and molecular weight of Pirimiphos-ethyl?

Pirimiphos-ethyl has molecular formula C13H24N3O3PS and molecular weight 333.387 g/mol.

Is Pirimiphos-ethyl hazardous?

Pirimiphos-ethyl has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H312 — Harmful in contact with skin; H410 — Very 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: 8/21/2026

How to cite: Jingsj. "Pirimiphos-ethyl (CAS 23505-41-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-29837-9 (accessed 2026-11-07).

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