Acid Orange II （Acid Orange 7）

Acid Orange II (C.I. Acid Orange 7) is a high-quality acid dye renowned for its vivid orange hue and reliable dyeing performance. Specifically formulated for dyeing protein fibers such as wool, silk, and polyamide, as well as certain synthetic fibers, Acid Orange II offers exceptional color strength and fastness. This dye is favored for its bright, intense orange color, excellent resistance to light, washing, and perspiration, and its ability to achieve consistent, high-quality results under acidic dyeing conditions.

Chemical and Technical Specifications:

• Chemical Name: 2-Hydroxy-1-naphthylazo-2-naphthol

• C.I. Number: 15510

• Molecular Formula: C16H11N3O3

• Molecular Weight: 273.28 g/mol

• Solubility: Soluble in acidic solutions; forms a stable dye solution

• Dyeing Method: Acid dyeing

• Lightfastness (Blue Wool Scale): 4-5 (good resistance to light exposure)

• Washfastness: Excellent, rated 4-5

• Rubbing Fastness: Good, rated 4

• pH Range: Effective in acidic conditions during dyeing

• Appearance: Bright orange powder

Industrial Applications:

1. Textile Industry:
   Acid Orange II is widely used for dyeing protein fibers such as wool and silk. It imparts a vivid orange color with excellent fastness properties, making it suitable for high-quality garments, luxury textiles, and fashion fabrics.

2. Polyamide Fibers:
   This dye is also effective for dyeing polyamide fibers (nylon), providing deep and uniform orange hues. It is utilized in products such as sportswear, hosiery, and other polyamide-based textile items.

3. Specialty Textiles:
   Acid Orange II is employed in the dyeing of specialty textiles where vibrant orange coloration and durability are essential. Its performance under acidic conditions ensures consistent and reliable dyeing results.

4. Home Textiles:
   The dye is used in home textiles including curtains, upholstery, and bed linens, offering bright orange shades and excellent colorfastness to enhance the visual and functional attributes of the fabric.

Key Performance Benefits:

• Vivid Orange Coloration: Delivers a bright and intense orange color with high color strength and uniformity.

• Outstanding Fastness: Provides excellent resistance to light, washing, and perspiration, ensuring long-lasting color retention and durability.

• Stable Dyeing Process: Forms a stable dye solution in acidic conditions, ensuring consistent and reliable dyeing results across various textile applications.

• Versatile Use: Suitable for a range of fibers including wool, silk, and polyamide, making it adaptable for diverse textile products.

• High Performance: Offers high-quality performance with superior colorfastness, ideal for both premium fashion and functional textile applications.