Description

Acid Orange 74 is a synthetic monoazo acid dye known for its vibrant orange hue and excellent dyeing properties. This high-performance colorant is valued for its strong affinity to protein fibers like wool, silk, and nylon, delivering bright, wash-fast shades. It is a critical component for manufacturers in the textile, leather, and paper industries seeking reliable and consistent coloration.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve bright orange shades with good fastness properties.
• Leather Coloring: Used in the dyeing of leather goods, providing rich and uniform color penetration.
• Paper Staining: Employed in the production of specialty papers, decorative papers, and security papers requiring color.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Other Industrial Applications: May be used in the coloration of detergents, soaps, and other industrial products.

Basic Information

Product Name	Acid Orange 74
CAS No.	10127-27-2
Molecular Formula	C16H11N3Na2O7S2
Molecular Weight	467.38 g/mol
Synonyms	Acid Orange AG; C.I. Acid Orange 74; Acid Leather Orange AG; 2,7-Naphthalenedisulfonic acid, 5-[(2,4-dihydroxyphenyl)azo]-4-hydroxy-3-[(4-sulfophenyl)azo]-, sodium salt (1:2); Sodium 5-[(2,4-dihydroxyphenyl)azo]-4-hydroxy-3-[(4-sulfophenyl)azo]naphthalene-2,7-disulphonate; Acid Fast Orange AG; Wool Orange AG
EINECS	233-357-1

Quality Control

Our Acid Orange 74 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industry standards. A Certificate of Analysis (COA) detailing purity, physical properties, and conformance to specification is provided with every shipment.

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.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	Max. 5.0%
Water Solubility	Conforms
Ash Content	Max. 30.0%

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