Description

Acid Red 308 is a synthetic, water-soluble azo dye belonging to the acid dye class, known for its vibrant red color and good fastness properties. Its primary value lies in providing strong, reliable coloration with excellent affinity for protein-based and polyamide fibers. This dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality red shades. It is also utilized in specialized applications such as the staining of biological tissues and certain ink formulations.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing bright red shades with good wash and light fastness.
• Leather Finishing: Used for coloring leather goods, offering uniform penetration and rich color.
• Paper Coloration: Employed in the production of specialty colored papers, including decorative and packaging materials.
• Biological Staining: Acts as a histological stain in laboratory settings for microscopic analysis of tissue samples.
• Ink Manufacturing: A colorant component for certain types of inks, including those for pens and non-impact printing.
• Polyamide Product Dyeing: Suitable for coloring various polyamide-based plastics and synthetic materials.

Basic Information

Product Name	Acid Red 308
CAS No.	12220-36-9
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 308; C.I. Acid Red 308; Acid Leather Red G; Nylosan Red F-3GL; Supranol Red 3GW; Telon Red F3GL; Lanasyn Red 3GL; Acid Fast Red A; 2,7-Naphthalenedisulfonic acid, 4-hydroxy-3-[(2-methoxyphenyl)azo]-, disodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 308 is manufactured under a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is tested against stringent in-house specifications for critical parameters such as color strength, shade, solubility, and impurity profile. A Certificate of Analysis (COA) detailing these results is provided with every shipment to support your quality assurance protocols.

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 product is light-sensitive; prolonged exposure to direct light should be avoided to prevent degradation.

Specification

Item	Specification
Appearance	Red to dark red 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%
Heavy Metals (as Pb)	≤ 20 ppm

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