Description

Acid Orange 63 is a synthetic azo dye belonging to the acid dye class, valued for its bright and durable orange hue. It is a critical component for imparting vibrant, wash-fast color to protein-based fibers like wool, silk, and nylon. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality coloration. Its specific chemical identity is confirmed by CAS NO 15792-50-4.

Application

• Primary dyeing and printing of wool and silk fabrics and yarns.
• Coloration of nylon fibers for apparel, carpets, and upholstery.
• Leather dyeing for footwear, garments, and accessories.
• Paper staining and tinting for specialty packaging and decorative papers.
• Ink formulation for inks requiring good light and water resistance.
• As a colorant for food packaging materials (subject to local regulatory approval).
• Historical or specialized staining in biological and laboratory contexts.

Basic Information

Product Name	Acid Orange 63
CAS No.	15792-50-4
Molecular Formula	C16H11N4NaO4S
Molecular Weight	378.34 g/mol
Synonyms	Acid Orange AG; C.I. Acid Orange 63; 2-Naphthalenesulfonic acid, 7-hydroxy-8-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, monosodium salt; Sodium 7-hydroxy-8-[(2-methoxy-5-methyl-4-sulfophenyl)azo]naphthalene-2-sulfonate; Naphthalene Orange AG; Wool Orange AG; Acid Leather Orange AG
EINECS	239-903-7

Quality Control

Our Acid Orange 63 is manufactured under a strict quality management system. Every batch is tested to ensure it meets precise color strength, shade, and solubility specifications critical for industrial dyeing processes. We provide comprehensive Certificates of Analysis (COA) detailing purity, impurity profiles, and physical-chemical parameters to guarantee batch-to-batch consistency and performance reliability.

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 original container is designed to maintain product integrity under recommended conditions.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Ash Content	≤ 1.0%
pH (1% Solution)	6.0 - 8.0

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