Description

Acid Red 88 is a synthetic, water-soluble azo dye renowned for its vibrant red color and excellent dyeing properties. This high-performance colorant is essential for achieving consistent, durable, and brilliant shades on various substrates. It is a critical raw material for manufacturers in the textile, leather, and paper industries, where color quality and fastness are paramount. The compound is also identified by the CAS registry number 1658-56-6.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers to achieve bright red shades with good light and wash fastness.
• Leather Coloring: Used in the staining and finishing of leather goods, providing rich, uniform color penetration.
• Paper Industry: Employed in the coloring of specialty papers, including decorative and packaging materials.
• Ink Manufacturing: A key pigment for formulating inks used in stamp pads, ballpoint pens, and other writing instruments.
• Biological Staining: Utilized in histology and microscopy as a biological stain for tissue samples.
• Indicator Applications: Can serve as a pH indicator in certain analytical and educational laboratory settings.

Basic Information

Product Name	Acid Red 88
CAS No.	1658-56-6
Molecular Formula	C20H12N2Na2O7S2
Molecular Weight	502.43 g/mol
Synonyms	Acid Red 88; C.I. 15620; Disodium 4-hydroxy-3-[(2-methoxyphenyl)azo]naphthalene-1-sulfonate; Azophloxine; Azophloxine G; Acid Leather Red BG; Lissamine Red W; Acid Leather Red B; Acid Leather Red 2B; Wool Fast Red A; Acid Fast Red A; Eosin Scarlet
EINECS	216-772-9

Quality Control

Our Acid Red 88 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. Each lot is tested against rigorous in-house specifications, which typically include parameters for color strength, shade, solubility, and impurity profiles. While this product is commonly produced to technical grade standards, we ensure it meets the requirements for its intended industrial applications. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee transparency and compliance.

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 and incompatible materials. The product is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); prolonged exposure to air and humidity should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Dark Red to Brownish-Red Powder
Identification (IR)	Conforms to Standard
Assay (HPLC)	≥ 85% (as dye content)
Moisture Content	≤ 5.0%
Water Solubility	Clear Solution
Ash Content	≤ 30.0%
Shade & Strength	Within agreed tolerance vs. Standard

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