Description

Fast Blue Rr Salt is a stabilized diazonium salt primarily used as a coupling agent in the synthesis of azo dyes and pigments. This compound is valued for its ability to produce intense, lightfast blue and violet shades in various materials. It is a critical intermediate for manufacturers in the textile, ink, and specialty chemical industries seeking to develop high-performance colorants.

Application

• Azo Dye & Pigment Synthesis: A key coupling component for producing a wide range of blue and violet azo dyes and organic pigments.
• Textile Dyeing & Printing: Used in the formulation of dyes for coloring natural and synthetic fibers, including cotton and polyester.
• Ink Manufacturing: Employed in the production of printing inks for packaging, publications, and textiles to achieve vivid blue hues.
• Biological Staining: Acts as a chromogenic agent in histology and cytology for staining tissues and cells in diagnostic applications.
• Research & Development: Serves as a versatile intermediate in chemical research for synthesizing novel colored compounds and functional materials.
• Specialty Coatings: Incorporated into coatings and paints where specific, stable blue coloration is required.

Basic Information

Product Name	Fast Blue Rr Salt
CAS No.	55663-99-5
Molecular Formula	C13H10ClN3O3Zn
Molecular Weight	373.07 g/mol
Synonyms	Fast Blue RR Salt; 4-Benzoylamino-2,5-diethoxybenzenediazonium Zinc Chloride; 4-Benzamido-2,5-diethoxybenzenediazonium Zinc Chloride; Diazonium, (4-benzamido-2,5-diethoxyphenyl)-, zinc chloride (2:1); C.I. 37175; Fast Blue RR; Fast Blue RR Diazo Salt
EINECS	Contact for details

Quality Control

Our Fast Blue Rr Salt is manufactured under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure consistent purity, reactivity, and color strength. A detailed Certificate of Analysis (COA) documenting assay, impurity profile, and physical specifications is provided with every shipment to guarantee it meets your application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; prolonged exposure to air, moisture, or light may degrade its performance. Keep away from heat sources and incompatible materials.

Specification

Item	Specification
Appearance	Light beige to tan powder
Identification (IR)	Conforms to structure
Assay (Diazonium Content)	Min. 95%
Solubility	Soluble in polar organic solvents
Loss on Drying	Max. 2.0%
Heavy Metals (as Pb)	Max. 20 ppm

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