Description

Acid Red 57 is a synthetic, water-soluble azo dye valued for its bright and vivid red color. It is a critical component for achieving consistent and durable coloration in various industrial processes. This dye is essential for manufacturers in the textile, leather, and paper industries seeking reliable and cost-effective red pigments.

Application

• Textile Dyeing: Primary application for dyeing nylon, silk, and wool fibers to a bright red shade.
• Leather Finishing: Used in the coloration of leather goods, providing good penetration and color fastness.
• Paper Staining: Employed for tinting paper products, including specialty papers and packaging materials.
• 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.
• Cosmetic Additive: Used in select cosmetic formulations where a red colorant is required, subject to regulatory approval.

Basic Information

Product Name	Acid Red 57
CAS No.	12217-34-4
Molecular Formula	C18H14N3NaO5S
Molecular Weight	407.38 g/mol
Synonyms	Acid Red 57; C.I. 17053; Acid Leather Red BG; Naphthalene Red BG; Acid Fast Red BG; Eosin Scarlet; 5-(Acetylamino)-4-hydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic Acid Disodium Salt; 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2)
EINECS	Contact for details

Quality Control

Our Acid Red 57 is produced under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for color strength, hue, and purity, consistent with industrial dye standards. Certificates of Analysis (COA) detailing assay, impurity profile, and physical parameters are available upon request.

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	Red to dark red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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