Description

Vat Yellow 49 CAS NO 57455-83-1 is a high-performance vat dye belonging to the anthraquinone class, valued for its excellent color fastness properties. It is a critical component for achieving durable and vibrant yellow shades in demanding textile applications. This product is essential for manufacturers in the textile and specialty chemical industries who require superior light, wash, and chlorine fastness in their finished goods.

Application

• Textile Dyeing and Printing: Primarily used for dyeing and printing of cellulosic fibers such as cotton, linen, and viscose, providing brilliant and fast yellow hues.
• Industrial Fabric Coloring: Employed in coloring workwear, automotive textiles, and other industrial fabrics where durability is paramount.
• Technical Yarn Production: Used for dyeing yarns intended for outdoor applications, awnings, and tarpaulins due to its exceptional lightfastness.
• Specialty Paper Coloring: Applicable for high-grade, color-fast paper products requiring stable coloration.
• Leather Dyeing: Suitable for dyeing leather goods where rich, stable yellow colors are desired.
• Pigment Preparation: Can serve as a base for the preparation of high-performance organic pigments in certain formulations.

Basic Information

Product Name	Vat Yellow 49
CAS No.	57455-83-1
Molecular Formula	C28H12Cl2N4O4
Molecular Weight	539.32 g/mol
Synonyms	C.I. Vat Yellow 49; Vat Yellow GCN; C.I. 70800; 8,16-Pyranthrenedione, 5,10-dichloro-6,15-dihydro-5,10-dihydroxy-; 5,10-Dichloro-6,15-dihydro-5,10-dihydroxy-8,16-pyranthrenedione; Amanthrene Yellow GCN; Caledon Yellow GCN; Indanthren Yellow GCN
EINECS	Contact for details

Quality Control

Our Vat Yellow 49 is manufactured under strict quality management systems to ensure batch-to-batch consistency and performance. The product undergoes rigorous testing for key parameters including shade, strength, particle size distribution, and fastness properties. Certificates of Analysis (COA) documenting purity, physical properties, and performance characteristics are available for every batch upon request.

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 strong oxidizing agents and incompatible materials. The container must be kept tightly closed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Yellow to Orange Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Shade	Within agreed tolerance vs. Standard
Strength	100% ± 3%
Moisture Content	≤ 5.0%
Particle Size	≥ 95% passes 80 mesh
Fastness to Light	≥ 6-7 (ISO 105-B02)
Fastness to Washing	≥ 4-5 (ISO 105-C06)

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