Direct Black 19

CAS 6428-31-5 · C34H27N13Na2O7S2 · 839.77 g/mol

Structure of Direct Black 19
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About Direct Black 19

Direct Black 19 (CAS 6428-31-5) is listed in the ChemSigma catalog. Its molecular formula is C34H27N13Na2O7S2 and its molecular weight is 839.77 g/mol. It is also known as disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate.

This page lists the product identifiers, the available pack sizes (500g, 100g, 10g, 1g) and how to obtain the Certificate of Analysis. A Certificate of Analysis is provided with every batch, and you can request the COA and product specification together with your quotation. Bulk quantities and custom packaging are available on request. Applications, storage, safety information and frequently asked questions are covered on the product details page.

Basic information

CAS number 6428-31-5
Product name Direct Black 19
Synonyms disodium 4-amino-3,6-bis[[4-[(2,4-diaminophenyl)azo]phenyl]azo]-5-hydroxynaphthalene-2,7-disulphonate
Molecular formula C34H27N13Na2O7S2
Molecular weight 839.77 g/mol
EC number 229-208-1

Certificate of Analysis

A Certificate of Analysis is provided with every batch. Request the COA and product specification together with your quotation.

Quote + COA & specification

Packaging

500g 100g 10g 1g

Bulk quantities and custom packaging are available on request.

Properties & storage

Refractive index 1.817