Description

C.I.Direct Blue 172 is a synthetic direct dye belonging to the azo chemical class, identified by CAS No. 12235-71-1. It is valued for its strong affinity to cellulosic fibers, providing deep, wash-fast blue colorations. This product is essential for manufacturers in the textile and paper industries seeking reliable and consistent dyeing performance.

Application

• Textile Dyeing: Primary application for dyeing cotton, viscose, rayon, and other cellulosic fibers.
• Paper Coloring: Used in the production of colored papers, tissues, and paperboard.
• Leather Finishing: Imparts color to leather goods in the tanning industry.
• Ink Formulation: A colorant component for certain types of inks and toners.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Craft and Specialty Dyes: Employed in artisan and small-scale dyeing operations.

Basic Information

Product Name	C.I. Direct Blue 172
CAS No.	12235-71-1
Molecular Formula	C40H23N7Na4O13S4
Molecular Weight	1029.88 g/mol
Synonyms	Direct Blue 172; C.I. 24315; Direct Blue 2B; Amanil Sky Blue 2B; Atul Direct Sky Blue 2B; Dinamine Sky Blue 2B; Direct Sky Blue 2B; Sirius Supra Blue 2B; Solar Sky Blue 2B; Solophenyl Blue 2B
EINECS	Contact for details

Quality Control

Our C.I. Direct Blue 172 is manufactured under a strict quality management system. Every batch undergoes comprehensive testing for key parameters including color strength, shade, solubility, and impurity profile to ensure batch-to-batch consistency and performance reliability. Certificates of Analysis (COA) documenting these results are available upon request.

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 strong oxidizing agents.

Specification

Item	Specification
Appearance	Blue to Bluish-Gray Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
pH (1% Solution)	6.0 - 8.0

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