Description

Acid Red 37 (C.I. 17045) (Diammonium Salt) is a synthetic, water-soluble azo dye belonging to the acid dye class, valued for its bright red hue and good lightfastness. It is a critical colorant for achieving vibrant and durable shades on nitrogenous substrates, particularly polyamide fibers like nylon and wool. This high-purity dye is essential for manufacturers in the textile, leather, and paper industries seeking consistent, high-quality coloration for their products.

Application

• Textile Dyeing: Primary application for dyeing polyamide fibers (nylon), wool, and silk, offering excellent color yield and wash fastness.
• Leather Coloring: Used for dyeing leather goods, providing rich, uniform color penetration.
• Paper Staining: Employed in the production of colored papers, specialty tissues, and paper products.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a histological stain in laboratory settings.
• Specialty Chemical Intermediate: Serves as a precursor or intermediate in the synthesis of other complex dyes and pigments.

Basic Information

Product Name	Acid Red 37 (C.I. 17045) (Diammonium Salt)
CAS No.	302912-22-7
Molecular Formula	C18H16N4Na2O7S2 • (NH4)2
Molecular Weight	Contact for details
Synonyms	Acid Red 37; C.I. 17045; Acid Leather Red BG; Nylon Fast Red 3B; Acid Fast Red A; Amido Naphthol Red G; Acid Brilliant Red 3B; 2-Naphthalenecarboxamide, 4-hydroxy-3-((2-methoxy-5-methyl-4-sulfophenyl)azo)-N-phenyl-, ammonium sodium salt
EINECS	Contact for details

Quality Control

Our Acid Red 37 is manufactured under a stringent quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for color strength, shade, solubility, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and performance metrics is provided with each shipment to guarantee consistency and reliability for your production processes.

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. Due to its light-sensitive nature, prolonged exposure to direct light should be avoided to maintain product integrity.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	Min. 95%
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to 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.