Chlorpyrifos-oxon

Also known as: Chlorpyrifos oxon, Chlorpyrifos oxygen analog, Dursban oxygen analog, O,O-Diethyl O-(3,5,6-trichloro-2-pyridyl) phosphate, Diethyl 3,5,6-trichloro-2-pyridyl phosphate, Chlorpyrifos-ethyl oxon, Chloropyrifos oxon, Phosphoric acid, diethyl 3,5,6-trichloro-2-pyridinyl ester

Chlorpyrifos-oxon (CAS 5598-15-2) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C9H11Cl3NO4P and a molecular weight of 334.52100 g/mol. Key properties include a boiling point of 357.8ºC at 760mmHg, a density of 1.461g/cm3 and a flash point of 170.2ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5598-15-2
Jingsj CID: J-1974589-3
Molecular Formula: C₉H₁₁Cl₃NO₄P
Molecular Weight: 334.52100 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	357.8ºC at 760mmHg
Density	1.461g/cm3
Flash Point	170.2ºC
Exact Mass	332.94900
PSA	67.46000
LogP	4.60170
Refractive Index	1.523
Storage Conditions	0-6°C

Activity & Biological Data

Additional Information	[1]. Florian Eyer, et al. Extreme variability in the formation of chlorpyrifos oxon (CPO) in patients poisoned by chlorpyrifos (CPF). Biochem Pharmacol. 2009 Sep 1;78(5):531-7. [2]. Lawrence M Schopfer, et al. Chlorpyrifos oxon promotes tubulin aggregation via isopeptide cross-linking between diethoxyphospho-Lys and Glu or Asp: Implications for neurotoxicity. J Biol Chem. 2018 Aug 31;293(35):13566-13577. [3]. Jie Gao, et al. Chlorpyrifos and chlorpyrifos oxon impair the transport of membrane bound organelles in rat cortical axons. Neurotoxicology. 2017 Sep;62:111-123. [4]. Wei Jiang, et al. Mice treated with chlorpyrifos or chlorpyrifos oxon have organophosphorylated tubulin in the brain and disrupted microtubule structures, suggesting a role for tubulin in neurotoxicity associated with exposure to organophosphorus agents. Toxicol Sci. 2010 May;115(1):183-93.

Additional Information

[1]. Florian Eyer, et al. Extreme variability in the formation of chlorpyrifos oxon (CPO) in patients poisoned by chlorpyrifos (CPF). Biochem Pharmacol. 2009 Sep 1;78(5):531-7. [2]. Lawrence M Schopfer, et al. Chlorpyrifos oxon promotes tubulin aggregation via isopeptide cross-linking between diethoxyphospho-Lys and Glu or Asp: Implications for neurotoxicity. J Biol Chem. 2018 Aug 31;293(35):13566-13577. [3]. Jie Gao, et al. Chlorpyrifos and chlorpyrifos oxon impair the transport of membrane bound organelles in rat cortical axons. Neurotoxicology. 2017 Sep;62:111-123. [4]. Wei Jiang, et al. Mice treated with chlorpyrifos or chlorpyrifos oxon have organophosphorylated tubulin in the brain and disrupted microtubule structures, suggesting a role for tubulin in neurotoxicity associated with exposure to organophosphorus agents. Toxicol Sci. 2010 May;115(1):183-93.

Frequently Asked Questions

What is the CAS number of Chlorpyrifos-oxon?

The CAS number of Chlorpyrifos-oxon is 5598-15-2.

What are the molecular formula and molecular weight of Chlorpyrifos-oxon?

Chlorpyrifos-oxon has molecular formula C9H11Cl3NO4P and molecular weight 334.52100 g/mol.

What are the upstream and downstream products of Chlorpyrifos-oxon?

For Chlorpyrifos-oxon, Upstream Products: Chlorpyrifos; Downstream Products: 3,5,6-Trichloro-2-pyridinol.

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. "Chlorpyrifos-oxon (CAS 5598-15-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1974589-3 (accessed 2026-11-07).

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