Vat Blue 4B

Also known as: Vat Blue 5, C.I. 73065, 5,5',7,7'-Tetrabromoindigo, Bromindigo, Ciba Blue 2B, Ciba Brilliant Blue BS, Durindone Blue 4B, Indigo 4B, Tetra Blue 2B, Arlanone Blue 2B, BASF Brilliant Indigo 4B, Hostavat Blue 2BD, Amanthrene Navy Blue 2B-MF, Solindene Blue 2BD, Sulfanthrene Blue 2B, Thiovat Brilliant Indigo 4BR, Tina Blue 2B, Tsuya Indigo 2B, Mitsui Tsuya Indigo 2B, Bromo Indigo 2B

Vat Blue 4B (CAS 2475-31-2) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H6Br4N2O2 and a molecular weight of 577.84700 g/mol. Key properties include a boiling point of 563.4ºC at 760mmHg, a density of 2.313g/cm3 and a flash point of 294.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 2475-31-2
Jingsj CID: J-42885-7
Molecular Formula: C₁₆H₆Br₄N₂O₂
Molecular Weight: 577.84700 g/mol
Category: Organohalogen Compounds
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	563.4ºC at 760mmHg
Density	2.313g/cm3
Flash Point	294.5ºC
Exact Mass	573.71600
PSA	58.20000
LogP	6.14080
Vapor Pressure	1.02E-12mmHg at 25°C
Refractive Index	1.762

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 Vat Blue 4B?

The CAS number of Vat Blue 4B is 2475-31-2.

What are the molecular formula and molecular weight of Vat Blue 4B?

Vat Blue 4B has molecular formula C16H6Br4N2O2 and molecular weight 577.84700 g/mol.

What are the upstream and downstream products of Vat Blue 4B?

For Vat Blue 4B, Upstream Products: Indigo, 3,5-Dibromobenzaldehyde, N-(2-Carboxyphenyl)glycine; Downstream Products: 6,8-Dibromoisatoic anhydride, 5,7-Dibromo-1H-indole-2,3-dione.

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. "Vat Blue 4B (CAS 2475-31-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42885-7 (accessed 2026-11-06).

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