Description

Fast Blue Bb Salt is a high-purity diazonium salt primarily used as a coupling agent in the synthesis of azo dyes and pigments. This compound is critical for producing intense and stable blue colorants with excellent fastness properties. It is essential for manufacturers in the textile, ink, and specialty chemical industries seeking reliable and consistent color development. The product is supplied as a stabilized salt, ready for use in demanding industrial applications.

Application

• Primary coupling component for the synthesis of azo pigments and dyes, particularly for blue shades.
• Key intermediate in the production of textile colorants for cotton, polyester, and nylon.
• Manufacture of printing inks for packaging, publications, and security printing.
• Used in the formulation of industrial paints and coatings requiring high color strength.
• Production of colored plastics and masterbatches.
• Research and development of novel functional dyes for optical and electronic applications.
• Staining agent in specific histological and biochemical analytical techniques.

Basic Information

Product Name	Fast Blue Bb Salt
CAS No.	15518-68-0
Molecular Formula	C₁₇H₁₈ClN₃O₃
Molecular Weight	347.80 g/mol
Synonyms	Fast Blue BB Salt; 4-Benzoylamino-2,5-diethoxybenzenediazonium Chloride Zinc Chloride Double Salt; 4-Benzamido-2,5-diethoxybenzenediazonium Chloride Zinc Chloride Complex; C.I. 37235; Azoic Diazo Component 20; Variamine Blue Salt B; Diazo Fast Blue B; Fast Blue B Base Diazonium Salt
EINECS	239-567-4

Quality Control

Our Fast Blue Bb Salt is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color strength, and reactivity. A detailed Certificate of Analysis (COA) documenting identity, assay, and impurity profiles is provided with each shipment to guarantee batch-to-batch consistency and support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic and strictly light-sensitive nature, the container must be kept tightly sealed immediately after use to prevent moisture absorption and decomposition. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Light beige to tan powder
Identification (IR)	Conforms to structure
Assay (Diazonium Content)	≥ 95.0%
Moisture (Karl Fischer)	≤ 2.0%
Insoluble Matter	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Coupling Value	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.