Indophenol Blue

Also known as: 1(4H)-Naphthalenone, 4-[[4-(dimethylamino)phenyl]imino]-, 4-[4-(dimethylamino)phenyl]iminonaphthalen-1-one, N-(4-Dimethylaminophenyl)-1,4-naphthoquinoneimine, Alpha-Naphthol Blue, alpha-Naphthol Blue, CI 49700

Indophenol Blue (CAS 132-31-0) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C18H16N2O and a molecular weight of 276.33200 g/mol. Key properties include a melting point of 168-170ºC(lit.), a boiling point of 427.7ºC at 760 mmHg, a density of 1.11 g/cm3 and a flash point of 212.5ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 132-31-0
Jingsj CID: J-1326964-1
Molecular Formula: C₁₈H₁₆N₂O
Molecular Weight: 276.33200 g/mol
Category: Alcohols
Last updated: 8/21/2026

Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Melting Point	168-170ºC(lit.)
Boiling Point	427.7ºC at 760 mmHg
Density	1.11 g/cm3
Flash Point	212.5ºC
Exact Mass	276.12600
PSA	32.67000
LogP	3.62590
Vapor Pressure	1.61E-07mmHg at 25°C
Refractive Index	1.604

Customs & Trade Information

HS Code	2925290090
Summary	2925290090 other imines and their derivatives; salts thereof。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Indophenol Blue?

The CAS number of Indophenol Blue is 132-31-0.

What are the molecular formula and molecular weight of Indophenol Blue?

Indophenol Blue has molecular formula C18H16N2O and molecular weight 276.33200 g/mol.

What are the upstream and downstream products of Indophenol Blue?

For Indophenol Blue, Upstream Products: 1-Naphthol, N,N-Dimethyl-1,4-benzenediamine, 2,4-Dibromo-1-naphthol; Downstream Products: 2-Hydroxy-1,4-naphthoquinone, 1,4-Naphthoquinone.

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. "Indophenol Blue (CAS 132-31-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1326964-1 (accessed 2026-11-06).

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