Description

Vat Yellow 21 is a high-performance vat dye belonging to the anthraquinone chemical class, known for its excellent color fastness and stability. Its primary value lies in providing brilliant, durable yellow shades that are resistant to light, washing, and chlorine, making it a critical component for demanding textile applications. This product is essential for manufacturers in the textile dyeing and printing industries, particularly for coloring cotton, viscose, and other cellulosic fibers where long-lasting color is paramount.

Application

• Primary application in the dyeing of cotton, rayon, and other cellulosic fibers for apparel and home textiles.
• Used in the printing of fabrics to achieve sharp, wash-fast yellow designs.
• Employed for dyeing industrial textiles such as canvas, tarpaulins, and awning fabrics requiring UV and weather resistance.
• Suitable for the coloration of yarn and thread intended for sewing, embroidery, and technical uses.
• Can be used in combination with other vat dyes to produce a wide range of green and olive shades.
• Applied in continuous and batch dyeing processes for mass production of uniformly colored fabrics.

Basic Information

Item	Detail
Product Name	Vat Yellow 21
CAS No.	1328-40-1
Molecular Formula	C28H12N2O2
Molecular Weight	408.41 g/mol
Synonyms	Vat Yellow G; C.I. Vat Yellow 21; C.I. 67300; Indanthren Yellow G; Caledon Yellow G; Durindone Yellow G; Mikethrene Yellow G; Nihonthrene Yellow G; Ponsol Yellow G; Tinon Yellow G
EINECS	215-527-1

Quality Control

Our Vat Yellow 21 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. The product is tested against key parameters including shade, strength, particle size, and solubility to meet the exacting standards of the global textile industry. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance characteristics is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials.

Specification

Item	Specification
Appearance	Yellow Powder
Identification (IR)	Conforms to Standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to Standard
Purity (HPLC)	≥ 96.0%
Moisture Content	≤ 1.0%
Particle Size	≥ 95% passes 80 mesh
Solubility in Dye Bath	Complete, Clear Solution

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