Description

Acid Orange 156 is a synthetic anionic dye belonging to the azo dye class, valued for its bright and durable orange hue. This high-performance colorant is engineered to deliver excellent light and wash fastness properties on protein-based fibers. It is primarily utilized by manufacturers in the textile and leather industries seeking reliable and vibrant coloration. The compound is supplied as a high-purity powder, ensuring consistent batch-to-batch performance for industrial applications.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve a vivid orange shade.
• Leather Finishing: Used in the coloration of leather goods, providing rich and even color penetration.
• Ink Formulation: Serves as a colorant component in specialty inks for various marking and printing applications.
• Paper Staining: Employed for tinting paper products where a specific orange color is required.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.

Basic Information

Product Name	Acid Orange 156
CAS No.	72827-75-9
Molecular Formula	C32H24N8Na2O8S2
Molecular Weight	750.69 g/mol
Synonyms	Acid Orange 156; C.I. Acid Orange 156; Sodium 4,4'-[carbonylbis(imino-4,1-phenylenecarbonylimino)]bis(5-hydroxy-2,7-naphthalenedisulfonate); 2,7-Naphthalenedisulfonic acid, 4,4'-[carbonylbis[imino(2-hydroxy-5-sulfo-3,1-phenylene)azo]]bis-, sodium salt (1:?); Lanasyn Orange S-R; Telon Orange RRL; Supranol Fast Orange RW
EINECS	Contact for details

Quality Control

Our Acid Orange 156 is manufactured under a stringent quality management system. Every batch is tested to ensure it meets precise color strength, shade, and purity specifications. A comprehensive Certificate of Analysis (COA) detailing parameters such as assay, impurity profile, and solubility is provided to guarantee consistent performance and supply reliability for your production 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 incompatible materials. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Orange to reddish-orange powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 0.5%

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