Description

Benzopurpurin 10B is a synthetic azo dye belonging to the direct dye class, known for its strong affinity to cellulose fibers. This compound matters for its vivid red-violet color and its utility as a versatile biological stain and pH indicator in analytical chemistry. Industries that need it include textile manufacturing for dyeing cotton and rayon, as well as research laboratories where it serves as a histological stain and a reagent for protein detection.

Application

• Textile Dyeing: Primary application for direct dyeing of cotton, rayon, and other cellulosic fibers to achieve a red-violet shade.
• Biological Staining: Used as a histological stain in microscopy to differentiate tissues and cellular structures.
• Analytical Chemistry: Functions as a pH indicator and a colorimetric reagent in various chemical assays.
• Protein Detection: Employed in laboratory protocols for the detection and quantification of proteins.
• Ink Formulation: A colorant component in the manufacturing of certain inks and colorants.
• Educational & Research: Used in academic and industrial research settings for experimental and demonstration purposes.

Basic Information

Product Name	Benzopurpurin 10B
CAS No.	2868-75-9
Molecular Formula	C34H26N6Na2O6S2
Molecular Weight	724.78 g/mol
Synonyms	Direct Red 10B; C.I. 23500; C.I. Direct Red 10B; Benzo Purpurine 10B; Cotton Red 10B; Direct Red 10; Benzopurpurin 4B (related); 3,3'-((3,3'-Dimethyl-(1,1'-biphenyl)-4,4'-diyl)bis(azo))bis(4-amino-1-naphthalenesulfonic acid) disodium salt
EINECS	220-704-4

Quality Control

Our Benzopurpurin 10B is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets precise specifications for color value and chemical composition. Certificates of Analysis (COA) documenting these results are provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical applications.

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). Keep away from incompatible materials. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Reddish-brown to dark violet powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 85% (Color Value)
Loss on Drying	≤ 5.0 %
Water Solubility	Freely soluble
pH (1% Solution)	7.0 - 9.0

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