Description

Vat Orange 4 is a synthetic organic pigment belonging to the vat dye class, known for its excellent lightfastness and wash fastness properties. This high-performance colorant is valued for its ability to produce vibrant, durable orange shades on various substrates. It is primarily utilized in the textile industry for dyeing and printing natural fibers like cotton, as well as in niche applications requiring color permanence.

Application

• Textile Dyeing: Primary application for dyeing cellulosic fibers such as cotton, linen, and viscose to achieve fast orange colors.
• Textile Printing: Used in printing pastes for fabrics, offering sharp and durable prints.
• Specialty Pigments: Can be used in the manufacture of high-stability pigments for artists' colors or specialty coatings.
• Leather Coloring: Applied in the dyeing of leather goods where color fastness is a critical requirement.
• Paper Staining: Employed for coloring high-grade papers where lightfastness is important.
• Research & Development: Serves as a standard or intermediate in chemical research and quality control laboratories.

Basic Information

Product Name	Vat Orange 4
CAS No.	1324-33-0
Molecular Formula	C₂₄H₁₂O₄
Molecular Weight	364.35 g/mol
Synonyms	C.I. Vat Orange 4; C.I. 59705; Vat Orange R; Pyranthrone Orange; Dibenzpyrenequinone; 8,16-Pyranthrenedione; C.I. 59705; Amanthrene Orange R
EINECS	215-354-9

Quality Control

Our Vat Orange 4 is manufactured under a stringent quality management system. Each batch is tested to ensure consistent shade, strength, and chemical purity, meeting the specifications required for industrial dyeing processes. A comprehensive Certificate of Analysis (COA) detailing parameters such as color value, particle size distribution, and impurity profile is provided with every shipment to guarantee supply reliability and performance consistency for our global customers.

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. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Orange to reddish-orange powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 2.0%
Ash Content	≤ 1.0%
Particle Size	>95% passes 80 mesh
Solubility	Insoluble in water; soluble in concentrated sulfuric acid

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