Description

Vat Black 27 is a high-performance vat dye belonging to the anthraquinone chemical class, known for its exceptional color fastness and deep, rich black shade. This product is critical for achieving durable, long-lasting coloration on cellulosic fibers like cotton, where resistance to washing, light, and chlorine is paramount. It is an essential raw material for textile manufacturers, industrial pigment producers, and specialty chemical formulators serving the denim, workwear, and high-quality fabric markets. The compound is supplied under the CAS registry number 2379-81-9.

Application

• Textile Dyeing: Primary application for dyeing and printing cotton, linen, viscose, and other cellulosic fibers to produce deep black shades with superior fastness properties.
• Denim Production: Used in the manufacture of high-quality denim fabrics, particularly for achieving consistent and durable black or dark indigo shades.
• Industrial Pigments: Serves as a key intermediate or colorant in the production of pigments for inks, paints, and plastics requiring high stability.
• Paper Coloring: Employed in specialty paper manufacturing where high lightfastness and chemical resistance of the color are required.
• Leather Finishing: Used in the dyeing of leather goods to provide rich, penetrating black colors with excellent rub fastness.
• Technical Textiles: Ideal for workwear, automotive fabrics, and other technical textiles demanding rigorous color durability against environmental factors.

Basic Information

Product Name	Vat Black 27
CAS No.	2379-81-9
Molecular Formula	C34H14N2O6
Molecular Weight	546.49 g/mol
Synonyms	Vat Black 27; C.I. 69005; C.I. Vat Black 27; Indanthren Black BB; Caledon Black X; Cibanone Black X; Nihonthrene Black BB; 16,17-Dihydro-5,9,14,18-anthrazinetetrone, dibenzo[b,ij]thioxanthene-7,14-dione derivative
EINECS	219-164-0

Quality Control

Our Vat Black 27 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Quality is verified through comprehensive testing including purity assay, shade strength, particle size analysis, and fastness property evaluations against industry benchmarks. A Certificate of Analysis (COA) detailing all relevant specifications is provided with each shipment to guarantee compliance with your technical requirements.

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). Keep away from strong oxidizing agents and incompatible materials. The container should be kept tightly sealed when not in use to prevent moisture absorption and contamination.

Specification

Item	Specification
Appearance	Black to Dark Blue Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 95.0%
Shade Strength	100 ± 3%
Moisture Content	≤ 5.0%
Particle Size (Passing 80 mesh)	≥ 95%
Fastness to Washing	4-5 (ISO 105-C03)
Fastness to Light	6-7 (ISO 105-B02)

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