Description

Acid Red 9 is a synthetic, water-soluble azo dye known for its vibrant red color. It is a critical component for imparting consistent and durable coloration across a range of industrial materials. This dye is primarily utilized by manufacturers in the textile, paper, leather, and ink industries seeking reliable and cost-effective red pigments. Its chemical stability under acidic conditions makes it a preferred choice for specific dyeing applications.

Application

• Textile Dyeing: Used for coloring wool, silk, and nylon fibers, providing good wash and light fastness.
• Paper Coloring: Imparts red hues to specialty papers, tissues, and packaging materials.
• Leather Finishing: Applied in the dyeing of leather goods such as footwear, bags, and upholstery.
• Ink Manufacturing: Serves as a colorant for inks used in stamp pads, ballpoint pens, and other writing instruments.
• Biological Staining: Employed as a histological stain in laboratory settings for microscopic analysis.
• Indicator Applications: Can be used as a pH indicator in certain chemical and educational contexts.

Basic Information

Product Name	Acid Red 9
CAS No.	8003-59-6
Molecular Formula	C18H13N3Na2O8S2
Molecular Weight	509.42 g/mol
Synonyms	Acid Red 9; C.I. 16185; Food Red 10; Amaranth; FD&C Red No. 2; Azorubin S; E123; C.I. Acid Red 9; Trisodium (4E)-3-oxo-4-[(4-sulfonato-1-naphthyl)hydrazono]naphthalene-2,7-disulfonate
EINECS	232-331-5

Quality Control

Our Acid Red 9 is manufactured under a strict quality management system. Each batch is tested to ensure it meets precise specifications for color strength, purity, and solubility. While primarily supplied for industrial use, production can reference standards for specific applications. A Certificate of Analysis (COA) detailing key parameters is provided with every shipment to guarantee consistency and performance.

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 material is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 85%
Color Strength	100 ± 5% (vs. Standard)
Moisture Content	≤ 5.0%
Water Solubility	Clear solution
Ash Content	≤ 30%

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