Name: Rahul

Message: Hello, I was wondering if you know of some suppliers for Reactive Blue 5. I want to use this dye for my research on some dye decolorizing peroxidases.

Colour Index Reactive Blue 5 is a monochlorotriazine anthraquinone dye also known as Cibacron Brilliant Blue BRP, Reactive Blue HGR, Blue K-GR, or Reactive Brilliant Blue K-GRS. Its registry numbers are 16823-51-1 (CAS) and 240-844-9 (EINECS).


Unfortunately, none of the suppliers I know for small quantities carries this dye. You can't buy it from PRO Chemical & Dye, Dharma Trading Company, Sigma Aldritch, Standard Dye, or Classic Dye. It is not listed on my table of Procion H type dyes.

Many of the dyes formerly made by the Cibacron company are now manufactured by Huntsman Textile Effects under the name Novacron. However, the Huntsman Textile Effects website does not list this particular dye. There is a mention of Novacron Brilliant Blue H-GR on the Town End Leeds website's Novacron page in the UK (scroll down), so perhaps they do still make it. Please contact Huntsman Textile Effects in the US.

The Chemical Book website lists these suppliers for reactive blue 5:

Ningbo Dynasty Chemical Co., Ltd	info@dynasty-chem.com	CHINA
HONEST JOY HOLDINGS LIMITED	sales@honestjoy.cn	USA
OCEAN TRADING CORPORATION	otcchem@otcchem.com	INDIA
Pylam Products Company, Inc.	sales@pylamdyes.com	USA
Advanced Technology & Industrial Co., Ltd.	sales@advtechind.com	CHINA

Good luck in locating a suitable supplier. (Please help support this web site. Thank you.)