2-Hydroxyimino-3-pentanone

Also known as: Pentane-2,3-dione 2-oxime, 2-Isonitroso-3-pentanone, 2-Oximino-3-pentanone, 2-Oximinopentan-3-one, 2,3-Pentanedione, 2-oxime, Molindone Impurity A, 2-hydroximino-3-oxopentane, 2-oximinopentane-3-one, 3-Pentanone,2-oximino, EINECS 251-239-4, (2E)-2-hydroxyiminopentan-3-one, 2,3-pentanedione monoxime

2-Hydroxyimino-3-pentanone (CAS 32818-79-4) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C5H9NO2 and a molecular weight of 115.13000 g/mol. Key properties include a melting point of 56-59 °C, a boiling point of 202.322ºC at 760 mmHg, a density of 1.045g/cm3 and a flash point of 76.162ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 32818-79-4
Jingsj CID: J-1088333-7
Molecular Formula: C₅H₉NO₂
Molecular Weight: 115.13000 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	56-59 °C
Boiling Point	202.322ºC at 760 mmHg
Density	1.045g/cm3
Flash Point	76.162ºC
Exact Mass	115.06300
PSA	49.66000
LogP	0.81560
Refractive Index	1.456
Storage Conditions	2-8°C

Customs & Trade Information

HS Code	2928000090
Summary	2928000090 other organic derivatives of hydrazine or of hydroxylamine VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2-Hydroxyimino-3-pentanone?

The CAS number of 2-Hydroxyimino-3-pentanone is 32818-79-4.

What are the molecular formula and molecular weight of 2-Hydroxyimino-3-pentanone?

2-Hydroxyimino-3-pentanone has molecular formula C5H9NO2 and molecular weight 115.13000 g/mol.

What are the upstream and downstream products of 2-Hydroxyimino-3-pentanone?

For 2-Hydroxyimino-3-pentanone, Upstream Products: 2,3-Pentanedione, Hydroxylamine hydrochloride, 1-Penten-3-one; Downstream Products: Molindone, 3-ethyl-2-methyl-4,5,6,7-tetrahydroindol-4-one, 2,3-Pentanedione.

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. "2-Hydroxyimino-3-pentanone (CAS 32818-79-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1088333-7 (accessed 2026-11-09).

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