Description

Hc Blue No. 5 is a synthetic organic dye belonging to the class of triphenylmethane colorants. This high-purity colorant is valued for its intense and stable blue hue, making it a critical component for achieving precise coloration in demanding industrial applications. It is primarily utilized by manufacturers in the textile, ink, and specialty coatings industries where consistent color quality and performance are paramount.

Application

• Primary dye for synthetic fibers, including polyester and nylon, in the textile industry.
• Key colorant in the formulation of printing inks for packaging and commercial printing.
• Pigment for industrial coatings and specialty paints requiring vibrant blue shades.
• Coloring agent for plastics and polymers to ensure uniform batch-to-batch color.
• Used in the production of colored paper products and decorative laminates.
• Research and development applications as a staining agent or tracer in laboratory settings.

Basic Information

Product Name	Hc Blue No. 5
CAS No.	68478-64-8
Molecular Formula	C41H48N3O6S2·Na
Molecular Weight	781.96 g/mol (as sodium salt)
Synonyms	Acid Blue 90; C.I. 42655; Food Blue 5; Wool Blue B; Lissamine Blue B; Patent Blue V; E 131; Aniline Blue, water soluble; Triphenylmethane Blue V; Sodium [4-(α-(4-diethylaminophenyl)-5-hydroxy-2,4-disulfophenylmethylidene)-2,5-cyclohexadien-1-ylidene]diethylammonium hydroxide inner salt
EINECS	270-898-1

Quality Control

Our Hc Blue No. 5 is manufactured under a strict quality management system to ensure batch-to-batch consistency and reliability. The product is tested against rigorous in-house specifications for identity, purity, and color strength. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical parameters is provided with each shipment to support your quality assurance protocols.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after initial use to prevent moisture absorption, which can affect product performance.

Specification

Item	Specification
Appearance	Dark blue to blue-violet powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 85.0%
Color Strength	95 - 105%
Loss on Drying	≤ 10.0%
Sulfated Ash	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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