2-Chloropyridine N-oxide hydrochloride

Also known as: 2-Chloropyridine 1-oxide hydrochloride, 2-Chloropyridinium chloride 1-oxide, 2-chloro-pyridine-1-oxide hydrochloride, 3-Chloropyridine N-oxide hydrochloride, 2-Chloropyridine N-oxide HCl, N-OXY-2-CHLOROPYRIDINE HYDROCHLORIDE, 2-Chloropyridine N-oxide hydrochloride, 97%

2-Chloropyridine N-oxide hydrochloride (CAS 20295-64-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H5Cl2NO and a molecular weight of 166.00500 g/mol. Key properties include a melting point of 140-142 °C(lit.), a boiling point of 140-142°C, a density of 1.27g/cm3 and a flash point of 141.3ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 20295-64-1
Jingsj CID: J-35342-4
Molecular Formula: C₅H₅Cl₂NO
Molecular Weight: 166.00500 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	140-142 °C(lit.)
Boiling Point	140-142°C
Density	1.27g/cm3
Flash Point	141.3ºC
Exact Mass	164.97500
PSA	25.46000
LogP	2.57050
Vapor Pressure	0.00113mmHg at 25°C

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2-Chloropyridine N-oxide hydrochloride?

The CAS number of 2-Chloropyridine N-oxide hydrochloride is 20295-64-1.

What are the molecular formula and molecular weight of 2-Chloropyridine N-oxide hydrochloride?

2-Chloropyridine N-oxide hydrochloride has molecular formula C5H5Cl2NO and molecular weight 166.00500 g/mol.

Is 2-Chloropyridine N-oxide hydrochloride hazardous?

2-Chloropyridine N-oxide hydrochloride has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 2-Chloropyridine N-oxide hydrochloride?

For 2-Chloropyridine N-oxide hydrochloride, Downstream Products: 2-Chloro-6-cyanopyridine, 2-Pyridinethiol 1-oxide, 2-chloropyridine,hydrochloride.

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-Chloropyridine N-oxide hydrochloride (CAS 20295-64-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35342-4 (accessed 2026-11-09).

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