Description

Vat Orange 21 is a high-performance vat dye belonging to the anthraquinone chemical class, known for its excellent color fastness and stability. This compound is valued for its ability to produce vibrant, durable orange shades that resist fading from light, washing, and perspiration. It is primarily sought after by manufacturers in the textile industry for dyeing and printing natural fibers like cotton, as well as for specialized applications requiring high color permanence.

Application

• Textile Dyeing: Primary application for dyeing cotton, linen, and other cellulosic fibers to achieve fast orange colors.
• Textile Printing: Used in printing pastes for creating patterned fabrics with excellent wash and light fastness.
• Yarn Dyeing: Employed in the coloration of yarns intended for high-quality apparel, home textiles, and industrial fabrics.
• Leather Coloring: Application in dyeing leather goods where color depth and durability are required.
• Paper Staining: Used for specialty paper products requiring colored, lightfast finishes.
• Pigment Preparation: Can serve as a precursor or colorant in the manufacture of certain organic pigments.

Basic Information

Product Name	Vat Orange 21
CAS No.	1328-39-8
Molecular Formula	C28H12N2O4
Molecular Weight	440.41 g/mol
Synonyms	C.I. 59300; C.I. Vat Orange 21; Vat Orange R; 8,16-Pyranthrenedione, 5,10-dihydro-5,10-dioxo-; Dibenzanthrone Orange; Anthraquinone Vat Dye Orange 21; Pyranthrone Orange
EINECS	215-545-9

Quality Control

Our Vat Orange 21 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, and fastness property evaluation. A Certificate of Analysis (COA) detailing specific test results is provided with each shipment to guarantee compliance with agreed specifications.

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.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Shade Strength	100 ± 5%
Moisture Content	Max. 1.0%
Ash Content	Max. 0.5%
Particle Size	Contact for details

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