Description

Acid Red 151 is a synthetic monoazo acid dye known for its bright red color and good lightfastness. This dye is valued for its strong affinity to protein fibers like wool, silk, and nylon, producing vibrant and durable shades. It is a critical component for manufacturers in the textile, leather, and paper industries seeking high-performance red colorants. The compound is identified by CAS No. 6406-56-0.

Application

Acid Red 151 is primarily used as a coloring agent in various industrial processes. Its specific applications include:

• Textile Dyeing: For dyeing wool, silk, and nylon fibers to achieve bright red shades with good wash and light fastness.
• Leather Finishing: As a colorant for leather goods, providing rich and uniform coloration.
• Paper Coloring: In the production of specialty papers, including decorative and packaging materials.
• Ink Manufacturing: As a pigment for inks used in stamp pads, ballpoint pens, and other writing instruments.
• Biological Staining: Potential use as a histological stain in laboratory settings for microscopic analysis.
• Cosmetic Additive: For coloring soaps and other personal care products where applicable under regulatory guidelines.

Basic Information

Product Name	Acid Red 151
CAS No.	6406-56-0
Molecular Formula	C22H14N4Na2O7S2
Molecular Weight	556.48 g/mol
Synonyms	Acid Red 151; C.I. 26900; Acid Leather Red BG; Nylosan Red F-3GL; Telon Red F3GL; Acid Fast Red A; Acid Brilliant Red 3B; 5-[(2,4-Dimethyl-6-sulfophenyl)azo]-6-hydroxy-1-naphthalenesulfonic acid disodium salt
EINECS	229-077-1

Quality Control

Our Acid Red 151 is manufactured under strict quality control protocols to ensure batch-to-batch consistency and high purity. We adhere to relevant industry standards, and our quality assurance includes testing for color strength, shade, solubility, and impurity profiles. Certificates of Analysis (COA) detailing specific test results are available for every shipment upon request.

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 incompatible materials. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Red to dark red powder
Identification (IR)	Conforms
Color Strength	100 ± 3% (vs. Standard)
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 0.5%
pH (1% Solution)	6.0 - 8.0
Heavy Metals (as Pb)	≤ 20 ppm
Assay (HPLC)	≥ 95.0%

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