Description

Alkali Blue 4B is a synthetic, triphenylmethane-based dye known for its vibrant blue color. This product is valued for its strong tinctorial strength and specific affinity for certain substrates, making it a critical component in various industrial coloration processes. It is primarily utilized by manufacturers in the textile, paper, and specialty ink industries for dyeing and staining applications.

Application

• Textile Dyeing: Used for coloring wool, silk, and nylon fibers.
• Paper Staining: Employed in the production of colored papers and for surface tinting.
• Biological Staining: Acts as a microscopic stain in histology and cytology for tissue differentiation.
• Ink Manufacturing: A colorant for specialty printing inks, including stamp pad inks.
• Leather Coloring: Used in the dyeing of leather goods.
• Indicator Applications: Can serve as a pH indicator in certain chemical analyses.

Basic Information

Product Name	Alkali Blue 4B
CAS No.	62152-67-4
Molecular Formula	C₃₇H₃₀N₃O₃S⁻·Na⁺
Molecular Weight	619.71 g/mol
Synonyms	Acid Blue 119; C.I. 42750; Alkali Blue 4BN; Alkali Blue 4BN-CF; Aniline Blue, Spirit Soluble; Spirit Soluble Aniline Blue; C.I. Solvent Blue 5; Victoria Blue B Base; [4-[Bis(4-dimethylaminophenyl)methylidene]cyclohexa-2,5-dien-1-ylidene]dimethylazanium; methyl sulfate
EINECS	Contact for details

Quality Control

Our Alkali Blue 4B is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure consistent color strength, purity, and performance. A Certificate of Analysis (COA) detailing key parameters such as assay, hue, and impurity profile is provided with every shipment to guarantee compliance with your specifications.

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.

Specification

Item	Specification
Appearance	Dark blue to blue-violet powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Loss on Drying	≤ 5.0%
Ash Content	≤ 1.0%
Water Solubility	Freely soluble

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