Description

Vat Black 31 is a high-performance vat dye belonging to the anthraquinone class, known for its excellent color fastness and deep, rich black shade. Its primary value lies in delivering superior wash, light, and chlorine fastness, making it a critical component for durable, high-quality coloration. This dye is essential for industrial manufacturers in the textile sector, particularly for dyeing and printing natural fibers like cotton, linen, and viscose to achieve long-lasting, vibrant black hues.

Application

• Primary application in the exhaust dyeing of cellulosic fibers such as cotton and linen.
• Used in the continuous dyeing and printing processes for textiles.
• Ideal for producing deep black shades on workwear, denim, and home textiles where durability is paramount.
• Suitable for dyeing viscose rayon and blended fabrics containing cellulose.
• Employed in specialized applications requiring high color fastness to light and washing.
• Can be used in the pigmentation of other materials where its stable properties are beneficial.

Basic Information

Product Name	Vat Black 31
CAS No.	12239-79-1
Molecular Formula	C34H14N2O6
Molecular Weight	546.49 g/mol
Synonyms	Vat Black 31; C.I. 69531; C.I. Vat Black 31; Vat Dye Black 31; 8,16-Pyranthrenedione, 5,6,12,13-tetrachloro-3,10-dihydro-; 5,6,12,13-Tetrachloro-3,10-dihydro-8,16-pyranthrenedione; Amanthrene Black FFB; Caledon Black XBN; Cibanone Black XBN
EINECS	Contact for details

Quality Control

Our Vat Black 31 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance reliability. The product undergoes rigorous testing for key parameters including dye content, shade, particle size, and reduction properties. A comprehensive Certificate of Analysis (COA) detailing purity, strength, and physical specifications is provided with every shipment to guarantee it meets the high standards required for industrial textile applications.

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 should be kept tightly sealed to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Black Powder
Dye Content	≥ 95%
Shade	Conforms to Standard
Strength	100 ± 3%
Moisture Content	≤ 5.0%
Particle Size	≥ 95% passes 80 mesh
Reduction Property	Conforms to Standard
Fastness Properties (Light, Wash)	Grade 6-7 (Typical)

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