Description

Brilliant Yellow CAS NO 3051-11-4 is a synthetic organic dye belonging to the azo class, known for its vibrant and stable yellow color. This high-purity colorant is essential for applications requiring precise, consistent, and durable coloration. It is a critical raw material for manufacturers in the textile, ink, and specialty coatings industries, where color fastness and performance are paramount.

Application

• Textile Dyeing: Used for coloring natural and synthetic fibers, including cotton, wool, and nylon, offering good wash and light fastness.
• Ink Formulation: A key pigment for producing printing inks, including flexographic, gravure, and packaging inks, providing high color strength.
• Industrial Coatings: Incorporated into paints, lacquers, and surface coatings for plastics, metals, and wood to achieve bright, opaque yellow finishes.
• Paper Coloring: Employed in the surface coloring and coating of specialty papers and paperboard products.
• Biological Staining: Utilized in histology and microbiology as a selective stain for microscopic analysis in laboratory settings.
• Plastics and Polymers: Acts as a colorant for masterbatches and compounded polymers, ensuring uniform dispersion and thermal stability during processing.

Basic Information

Product Name	Brilliant Yellow
CAS No.	3051-11-4
Molecular Formula	C26H18N4Na2O8S2
Molecular Weight	624.55 g/mol
Synonyms	Acid Yellow 40; C.I. 18950; Brilliant Yellow S; Direct Yellow 4; 2,2'-[(1,1'-Biphenyl)-4,4'-diyldi(E)diazene-2,1-diyl]bis(5-aminobenzenesulfonic acid) disodium salt; 4,4'-Bis(2-sulfo-4-aminophenylazo)biphenyl disodium salt; Lissamine Yellow 2G; Paper Yellow R
EINECS	221-277-7

Quality Control

Our Brilliant Yellow is produced under a stringent quality management system to ensure batch-to-batch consistency and reliability. Each lot is tested against rigorous in-house specifications, which typically include parameters for color strength, purity, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every 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 a controlled room temperature (15-25°C). Keep away from incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Yellow to orange-yellow powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5%
Moisture Content	≤ 5.0%
Water Solubility	Clear solution
Ash Content	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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