Description

Fast Yellow CAS NO 50927-00-9 is a high-performance synthetic organic pigment belonging to the diarylide yellow class, valued for its excellent color strength and durability. This pigment is engineered to provide superior lightfastness and heat stability, making it a critical component for demanding industrial applications. It is primarily utilized by manufacturers in the plastics, inks, coatings, and synthetic fiber industries seeking consistent, vibrant yellow coloration.

Application

• Plastics Coloring: Masterbatch and compound production for polyethylene (PE), polypropylene (PP), polystyrene (PS), and PVC, offering excellent dispersion and thermal stability during processing.
• Printing Inks: Formulation of high-quality offset, gravure, and flexographic inks for packaging and publications, providing bright shade and good printability.
• Industrial Coatings: Used in solvent-based and water-based paint systems for automotive finishes, industrial machinery, and architectural coatings.
• Synthetic Fibers: Mass coloration (dope dyeing) of polyamide, polyester, and polyacrylonitrile fibers, ensuring excellent wash and light fastness.
• Rubber and Elastomers: Coloring of technical rubber goods, footwear, and other elastomeric products.
• Artists' Colors: A component in the manufacture of professional-grade artists' oils, acrylics, and watercolors.

Basic Information

Item	Detail
Product Name	Fast Yellow CAS NO 50927-00-9
CAS No.	50927-00-9
Molecular Formula	C34H28Cl4N6O4
Molecular Weight	726.44 g/mol
Synonyms	Pigment Yellow 83; C.I. 21108; Diarylide Yellow HR; Permanent Yellow HR; Vulcan Fast Yellow; Benzidine Yellow HR; 3,3'-[(3,3'-Dichloro[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[4-chloro-2-methyl-] Benzoic Acid; 2-Methyl-5-[(E)-2-[4-[(E)-2-(4-chloro-2-methyl-5-sulfonatophenyl)diazenyl]-3,3'-dichlorobiphenyl-4-yl]diazenyl]-4-chlorobenzoic Acid
EINECS	256-743-5

Quality Control

Our production of Fast Yellow adheres to stringent quality management protocols to ensure batch-to-batch consistency and performance reliability. Every lot is tested against key parameters including color strength, hue, particle size distribution, and impurity profile. Certificates of Analysis (COA) documenting these results are provided with each shipment. Our quality system supports compliance with relevant global standards for industrial pigments.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after initial opening to prevent moisture absorption and caking. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Yellow Powder
Identification (IR)	Conforms
Color Strength	100 ± 5% (vs. Standard)
Hue	Within agreed tolerance
Purity (HPLC)	≥ 96.0%
Moisture Content (Karl Fischer)	≤ 2.0%
Ash Content	≤ 1.0%
Water Soluble Matter	≤ 1.5%
Particle Size (D50)	0.1 - 0.5 µm
pH Value (10% Aqueous Slurry)	6.0 - 8.0
Lightfastness (ISO 105-B02)	7-8 (Scale 1-8)
Heat Resistance	200°C

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