Description

Acid Red 307 is a synthetic, water-soluble azo dye belonging to the acid dye class, widely recognized for its vibrant red hue and excellent color fastness. This high-performance dye is engineered to deliver consistent, reliable coloration with strong affinity for protein-based and polyamide fibers. It is an essential component for manufacturers in the textile, leather, and paper industries seeking durable and brilliant red shades. The compound is supplied under strict quality control to ensure batch-to-batch uniformity for industrial applications.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, providing excellent wash and light fastness.
• Leather Finishing: Used for coloring leather goods, offering deep penetration and uniform color on tanned hides.
• Paper Coloration: Effective for tinting specialty papers, including decorative and packaging materials.
• Ink Manufacturing: A key pigment for formulating inks used in ballpoint pens, stamp pads, and other writing instruments.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Polymer Coloring: Suitable for mass coloration of certain synthetic polymers and plastics during manufacture.

Basic Information

Product Name	Acid Red 307
CAS No.	12220-35-8
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 307; C.I. Acid Red 307; Sodium 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-1-naphthalenesulfonate; 2-Naphthalenesulfonic acid, 4-hydroxy-3-[(2-methoxy-5-methyl-4-sulfophenyl)azo]-, disodium salt; Acid Leather Red D; Nylosan Red F-3GL; Telon Red F3GL; Acid Fast Red A
EINECS	Contact for details

Quality Control

Our Acid Red 307 is manufactured under a stringent quality management system to ensure it meets the high standards required for industrial dyeing processes. Each batch is tested for critical parameters including color strength, shade, solubility, and impurity profile. A comprehensive Certificate of Analysis (COA) documenting purity, physical properties, and performance characteristics is provided with every shipment to guarantee traceability 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. The product is light-sensitive (store away from light) and hygroscopic (moisture-sensitive); ensure the container is sealed after each use to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms to standard
Assay (HPLC)	≥ 95.0%
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution at 1%
Ash Content	≤ 30.0%
Heavy Metals (as Pb)	≤ 20 ppm

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