Description

Naphthyl Red Sulpho CAS NO 77097-80-4 is a synthetic azo dye belonging to the sulphonated naphthyl red class, valued for its vibrant red color and water solubility. This compound is essential for applications requiring a stable and intense red hue in aqueous systems. It is primarily needed by manufacturers in the textile, ink, and specialty chemical industries for dyeing and coloring processes.

Application

• Textile Dyeing: Used as a direct or acid dye for coloring natural and synthetic fibers, including wool, silk, and nylon.
• Ink Formulation: Serves as a key pigment in the production of water-based inks for printing and writing applications.
• Paper Coloring: Employed in the surface coloring and coating of specialty papers and cardboard.
• Biological Staining: Utilized as a histological stain in laboratory settings for microscopic analysis of tissue samples.
• Leather Processing: Applied in the dyeing of leather goods to achieve consistent red shades.
• Chemical Indicator: Functions as a pH indicator or colorimetric reagent in certain analytical chemistry procedures.

Basic Information

Product Name	Naphthyl Red Sulpho
CAS No.	77097-80-4
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Red 88; C.I. 15620; Naphthalene Red S; Naphthyl Red S; Sulphonated Naphthyl Red; 4-[(2-Hydroxy-1-naphthyl)azo]-3-methylbenzenesulfonic acid; 3-Methyl-4-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic acid
EINECS	Contact for details

Quality Control

Our Naphthyl Red Sulpho is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for color strength, purity, and solubility. Certificates of Analysis (COA) documenting these results are available upon request 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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Water Solubility	Freely soluble
Heavy Metals (as Pb)	≤ 20 ppm

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