3,5-dichloropyridin-2-ol

Also known as: 3,5-Dichloro-2-pyridone, 2-Hydroxy-3,5-dichloropyridine, 3,5-Dichloropyridin-2(1H)-one, 3,5-Dichloro-1H-pyridin-2-one, 3,5-Dichloro-2-pyridinol, 3,5-Dichloro-2-hydroxypyridine, 3,5-Dichloro-2(1H)-pyridinone, 2(1H)-Pyridinone, 3,5-dichloro-, 2-Pyridinol, 3,5-dichloro-

3,5-dichloropyridin-2-ol (CAS 5437-33-2) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C5H3Cl2NO and a molecular weight of 163.989 g/mol. Key properties include a melting point of 180-182 °C(lit.), a boiling point of 293.9±35.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 131.5±25.9 °C. 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.: 5437-33-2
Jingsj CID: J-1412359-2
Molecular Formula: C₅H₃Cl₂NO
Molecular Weight: 163.989 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	180-182 °C(lit.)
Boiling Point	293.9±35.0 °C at 760 mmHg
Density	1.6±0.1 g/cm3
Flash Point	131.5±25.9 °C
Exact Mass	162.959167
PSA	32.86000
LogP	1.37
Vapor Pressure	0.0±0.6 mmHg at 25°C
Refractive Index	1.602

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 3,5-dichloropyridin-2-ol?

The CAS number of 3,5-dichloropyridin-2-ol is 5437-33-2.

What are the molecular formula and molecular weight of 3,5-dichloropyridin-2-ol?

3,5-dichloropyridin-2-ol has molecular formula C5H3Cl2NO and molecular weight 163.989 g/mol.

Is 3,5-dichloropyridin-2-ol hazardous?

3,5-dichloropyridin-2-ol 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 3,5-dichloropyridin-2-ol?

For 3,5-dichloropyridin-2-ol, Upstream Products: N-Fluoro-3,5-dichloropyridinium triflate, 3,5-Dichloropyridine, 2(1H)-Pyridone; Downstream Products: 5-Chloro-2-hydroxynicotinic acid, 2,3,5-Trichloropyridine.

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. "3,5-dichloropyridin-2-ol (CAS 5437-33-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1412359-2 (accessed 2026-11-09).

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