2-Butyl-4-chloro-5-formylimidazole

Also known as: 2-Butyl-4-chloro-1H-imidazole-5-carbaldehyde, 2-Butyl-5-chloro-1H-imidazole-4-carboxaldehyde, 2-Butyl-5-chloro-4-formylimidazole, 2-Butyl-4-chloroimidazole-5-carboxaldehyde, 2-n-Butyl-4-chloro-5-formylimidazole, 2-Butyl-4(5)-chloro-5(4)-imidazolecarboxaldehyde, BCFI, MFCD01934396, EINECS 410-260-0

2-Butyl-4-chloro-5-formylimidazole (CAS 83857-96-9) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H11ClN2O and a molecular weight of 186.64 g/mol. Key properties include a melting point of 97-100 °C(lit.), a boiling point of 384.1±22.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 186.1±22.3 °C. It is classified under GHS with signal word Warning and hazard statements H317 — May cause an allergic skin reaction and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 83857-96-9
Jingsj CID: J-11503-0
Molecular Formula: C₈H₁₁ClN₂O
Molecular Weight: 186.64 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	97-100 °C(lit.)
Boiling Point	384.1±22.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	186.1±22.3 °C
Exact Mass	186.055984
PSA	45.75000
LogP	3.05
Vapor Pressure	0.0±0.9 mmHg at 25°C
Refractive Index	1.568
Additional Property	slightly soluble

GHS Safety & Compliance

Irritant / Environmental HazardSignal word: Warning

H317 — May cause an allergic skin reaction
H411 — Toxic to aquatic life with long lasting effects

Customs & Trade Information

HS Code	2933290090
Summary	2933290090. other compounds containing an unfused imidazole 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-Butyl-4-chloro-5-formylimidazole?

The CAS number of 2-Butyl-4-chloro-5-formylimidazole is 83857-96-9.

What are the molecular formula and molecular weight of 2-Butyl-4-chloro-5-formylimidazole?

2-Butyl-4-chloro-5-formylimidazole has molecular formula C8H11ClN2O and molecular weight 186.64 g/mol.

Is 2-Butyl-4-chloro-5-formylimidazole hazardous?

2-Butyl-4-chloro-5-formylimidazole has GHS signal word Warning and hazard statements H317 — May cause an allergic skin reaction; H411 — Toxic to aquatic life with long lasting effects.

What are the upstream and downstream products of 2-Butyl-4-chloro-5-formylimidazole?

For 2-Butyl-4-chloro-5-formylimidazole, Upstream Products: N,N-Dimethylformamide, Glycine, (2-Butyl-5-chloro-1H-imidazol-4-yl)methanol; Downstream Products: (2-Butyl-5-chloro-1H-imidazol-4-yl)methanol, 2-Butyl-1H-imidazole-4-carbaldehyde, Trityllosartan.

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-Butyl-4-chloro-5-formylimidazole (CAS 83857-96-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-11503-0 (accessed 2026-11-06).

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