Description

Hc Blue No. 4 CAS NO 158571-57-4 is a synthetic organic dye belonging to the class of HC (Hair Color) blues, valued for its vibrant and stable blue coloration. This compound is essential for formulators requiring precise and consistent pigmentation in demanding applications. It is primarily utilized by manufacturers in the cosmetics and personal care industries, as well as in specialized industrial dye sectors.

Application

• Primary use in oxidative hair color formulations, providing long-lasting blue tones and shades.
• Manufacturing of semi-permanent hair dyes, color creams, and developer gels.
• Pigment for cosmetic products such as soaps and bath products where color stability is required.
• Potential use as a colorant for specialty inks and coatings in non-food contact applications.
• Dye for research and development of new color systems in the chemical industry.
• Coloration of textile fibers in niche, non-standard dyeing processes.

Basic Information

Product Name	Hc Blue No. 4
CAS No.	158571-57-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	HC Blue No. 4; Hair Color Blue No. 4; 2-[(4-Amino-3-methylphenyl)amino]-5-[(2-hydroxyethyl)amino]-1,4-benzoquinone; 1,4-Benzenedione, 2-[(4-amino-3-methylphenyl)amino]-5-[(2-hydroxyethyl)amino]-; Toluene-2,5-diamine, N1-(2-hydroxyethyl)-N4-(4-amino-3-methylphenyl)- (derivative); Cosmetic Blue 4; Arianor Blue
EINECS	Contact for details

Quality Control

Our Hc Blue No. 4 is produced under a strict quality management system. Each batch is tested to ensure it meets stringent specifications for identity, purity, and color strength, relevant for cosmetic and industrial applications. Certificates of Analysis (COA) documenting these parameters are available upon request to support your quality assurance and regulatory compliance needs.

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. The product is light-sensitive and should be stored away from light to prevent degradation.

Specification

Item	Specification
Appearance	Blue to dark blue powder or granules
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Color Value	Contact for details

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