Description

Patent Blue V is a synthetic, water-soluble triphenylmethane dye widely recognized for its brilliant blue color. It serves as a crucial colorant in applications where precise, stable, and vibrant blue hues are required. This product is essential for manufacturers in the food, pharmaceutical, cosmetic, and diagnostic industries seeking a reliable and compliant coloring agent.

Application

• As a food colorant (E131) in confectionery, beverages, and desserts.
• In the pharmaceutical industry for coloring tablets, capsules, and medicinal syrups.
• As a cosmetic color additive in soaps, shampoos, and other personal care products.
• For biological and histological staining in laboratory diagnostics and microscopy.
• In the manufacture of inks and writing fluids.
• As a tracer dye in industrial and hydrological studies.

Basic Information

Product Name	Patent Blue V
CAS No.	3536-49-0
Molecular Formula	C27H31N2NaO6S2
Molecular Weight	566.66 g/mol
Synonyms	Acid Blue 3; Food Blue 5; E131; C.I. 42051; Patent Blue V Calcium Salt; Sulphan Blue; Alphazurine FG; Patentblau V; Acid Blue 3, Calcium Salt
EINECS	222-573-8

Quality Control

Our Patent Blue V is produced under a strict quality management system. Each batch is tested to ensure compliance with relevant specifications, including those for food (FCC, EU Directive) and pharmaceutical (where applicable) grades. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and safety parameters is provided with every shipment to guarantee traceability and consistency.

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 and sources of heat.

Specification

Item	Specification
Appearance	Dark blue to blue-violet powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 85% (as Color Content)
Loss on Drying	≤ 15.0 %
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

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