5,5'-Dibromoindigo

Also known as: C.I. Vat Blue 35, C.I. 73060, Brilliant Indigo KMR, Bromoindigo, Mitsui Tsuya Indigo BR, Pharmanthrene Blue R, (2E)-5-bromo-2-(5-bromo-3-oxo-1H-indol-2-ylidene)-1H-indol-3-one, (2Z)-5-bromo-2-(5-bromo-3-oxo-1H-indol-2-ylidene)-1H-indol-3-one, 5,5'-Dibromoindigo

5,5'-Dibromoindigo (CAS 84-40-2) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H8Br2N2O2 and a molecular weight of 420.05500 g/mol. Key properties include a boiling point of 492ºC at 760 mmHg, a density of 1.932g/cm3 and a flash point of 251.3ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 84-40-2
Jingsj CID: J-1948751-5
Molecular Formula: C₁₆H₈Br₂N₂O₂
Molecular Weight: 420.05500 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	492ºC at 760 mmHg
Density	1.932g/cm3
Flash Point	251.3ºC
Exact Mass	417.89500
PSA	58.20000
LogP	4.61580
Refractive Index	1.739

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. 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 5,5'-Dibromoindigo?

The CAS number of 5,5'-Dibromoindigo is 84-40-2.

What are the molecular formula and molecular weight of 5,5'-Dibromoindigo?

5,5'-Dibromoindigo has molecular formula C16H8Br2N2O2 and molecular weight 420.05500 g/mol.

What are the upstream and downstream products of 5,5'-Dibromoindigo?

For 5,5'-Dibromoindigo, Downstream Products: 2-Amino-5-bromobenzoic acid.

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. "5,5'-Dibromoindigo (CAS 84-40-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1948751-5 (accessed 2026-11-07).

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