Description

Acid Orange 56 is a synthetic monoazo acid dye renowned for its vibrant orange hue and excellent dyeing properties. It is a critical component for achieving consistent, high-quality coloration in protein-based fibers, offering superior fastness and leveling characteristics. This product is essential for manufacturers in the textile, leather, and paper industries seeking reliable and efficient dyeing solutions.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing bright orange shades with good wash and light fastness.
• Leather Coloring: Used in the dyeing of leather goods, including footwear, apparel, and accessories, to impart durable and uniform color.
• Paper Staining: Employed in the production of specialty papers, decorative papers, and security papers requiring specific colorants.
• Ink Formulation: A colorant component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Acid Orange 56
CAS No.	6470-20-8
Molecular Formula	C16H11N3Na2O7S2
Molecular Weight	467.38 g/mol
Synonyms	Acid Orange A; C.I. Acid Orange 56; Acid Leather Orange A; Acid Fast Orange A; Sodium 5-[(2,4-dinitrophenyl)azo]salicylate; 5-[(2,4-Dinitrophenyl)azo]salicylic acid sodium salt; Dinitroaminoazobenzene sodium sulfonate
EINECS	229-293-9

Quality Control

Our Acid Orange 56 is manufactured under strict quality control protocols to ensure batch-to-batch consistency and compliance with industry standards. Each lot is tested for critical parameters including color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing the results is provided with every shipment to guarantee product integrity and support your quality assurance processes.

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.

Specification

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

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