Description

Acid Red 97 (C.I. 22890) is a synthetic monoazo acid dye widely recognized for its vibrant red hue and good lightfastness. This colorant is valued for its strong affinity to protein fibers like wool, silk, and nylon, producing bright and level dyeings. It is primarily utilized by manufacturers in the textile, leather, and paper industries for dyeing and printing applications. The product is supplied as a high-purity powder to ensure consistent color strength and batch-to-batch reliability for industrial processes.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve bright red shades.
• Leather Finishing: Used in the dyeing of leather goods, providing rich and uniform coloration.
• Paper Coloring: Employed in the manufacture of colored papers, specialty tissues, and decorative paper products.
• Ink Formulation: A component in the production of inks for various marking and printing purposes.
• Biological Staining: Can be used as a histological stain in laboratory settings for microscopic analysis.
• Specialty Coatings: Incorporated into coatings and paints where a specific red pigment is required.

Basic Information

Product Name	Acid Red 97
CAS No.	10169-02-5
Molecular Formula	C32H24N4Na2O8S2
Molecular Weight	698.66 g/mol
Synonyms	Acid Red 97; C.I. 22890; Acid Leather Red BG; Acid Leather Red B; Acid Fast Red A; Naphthalene Red 4BS; Acid Brilliant Red 3B; Acid Red B; 2-Naphthalenesulfonic acid, 7-[[4-[(2,4-dimethylphenyl)azo]phenyl]azo]-1,3-naphthalenedisulfonic acid, disodium salt
EINECS	233-440-1

Quality Control

Our Acid Red 97 is manufactured under a strict quality management system to ensure it meets the high standards required for industrial dyeing applications. Every batch is tested for key parameters including color strength, shade, solubility, and impurity profile to guarantee consistency and performance. Certificates of Analysis (COA) documenting these results 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	Reddish-brown 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. 1.0%

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