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4-Chloro-1H-pyrrolo[2,3-b]pyridine

Also known as: 4-Chloro-7-azaindole, 1H-Pyrrolo[2,3-b]pyridine, 4-chloro-, 4-Chloro-1H-pyrrolo[2,3-b]pyridin, 4-Chloro-1H-pyrrolo[2,3-β]pyridine, MFCD08272232

4-Chloro-1H-pyrrolo[2,3-b]pyridine (CAS 55052-28-3) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C7H5ClN2 and a molecular weight of 152.58 g/mol. Key properties include a melting point of 174-176ºC and a density of 1.4±0.1 g/cm3. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
55052-28-3
Jingsj CID
J-1955922-9
Molecular Formula
C7H5ClN2
Molecular Weight
152.58 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026
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Physicochemical Properties

Melting Point174-176ºC
Density1.4±0.1 g/cm3
Exact Mass152.014130
PSA28.68000
LogP2.52
Refractive Index1.703

GHS Safety & Compliance

Corrosion / Acute ToxicitySignal word: Danger
  • H301 — Toxic if swallowed
  • H315 — Causes skin irritation
  • H318 — Causes serious eye damage
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2933990090
Summary2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. 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 4-Chloro-1H-pyrrolo[2,3-b]pyridine?

The CAS number of 4-Chloro-1H-pyrrolo[2,3-b]pyridine is 55052-28-3.

What are the molecular formula and molecular weight of 4-Chloro-1H-pyrrolo[2,3-b]pyridine?

4-Chloro-1H-pyrrolo[2,3-b]pyridine has molecular formula C7H5ClN2 and molecular weight 152.58 g/mol.

Is 4-Chloro-1H-pyrrolo[2,3-b]pyridine hazardous?

4-Chloro-1H-pyrrolo[2,3-b]pyridine has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H315 — Causes skin irritation; H318 — Causes serious eye damage.

What are the upstream and downstream products of 4-Chloro-1H-pyrrolo[2,3-b]pyridine?

For 4-Chloro-1H-pyrrolo[2,3-b]pyridine, Upstream Products: 7-Azaindole, 7-Azaindole-7-oxide, 1H-Pyrrolo[2,3-b]pyridine, 4-chloro-1-(phenylsulfonyl)-; Downstream Products: 4-chloro-2-iodo-1-[(4-methylphenyl)sulfonyl]-1H-pyrrolo[2,3-b]pyridine, 4-Iodo-1H-pyrrolo[2,3-b]pyridine, 1-(4-Iodo-1H-pyrrolo[2,3-b]pyridin-1-yl)ethanone.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "4-Chloro-1H-pyrrolo[2,3-b]pyridine (CAS 55052-28-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1955922-9 (accessed 2026-11-09).

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