Acid Red 151 CAS 6406-56-0

What is Acid Red 151 CAS 6406-56-0?

Acid Red 151 CAS 6406-56-0 is a synthetic organic acid dye belonging to the azo dye class and formulated as a water-soluble monosodium salt. Typically supplied as a dark red powder, it is manufactured through the precise diazo coupling of 4-((4-aminophenyl)diazenyl)benzenesulfonic acid with naphthalen-2-ol. When dissolved in water, it forms a turbid brown-orange solution, and it readily dissolves in ethanol to produce a vibrant orange-red tint. Due to its stable chemical structure and excellent substrate affinity, it serves as a highly reliable industrial colorant for natural fibers, leather, and specialized plastics.

Specifications

Features

• Predictable Chemical Reactivity – Exhibits distinct visual color shifts in extreme pH and chemical environments: it turns bluish-green in concentrated sulfuric acid, dark purple in thick sodium hydroxide, and orange-brown in concentrated hydrochloric acid.
• Excellent Substrate Affinity – Designed specifically for strong binding with polyamides and natural protein fibers, ensuring uniform color distribution and deep penetration.
• Aqueous & Organic Compatibility – Soluble in water, ethanol, and ethylene glycol ethyl ether, allowing for flexible integration into both aqueous dye baths and specific solvent-based formulations.

Applications

• Textile Dyeing – Broadly utilized in the textile industry for the high-quality, even dyeing of wool, silk, polyamides (nylon), and blended fabrics.
• Leather Processing – Applied extensively in the leather tanning and coloring industry to provide durable, aesthetically pleasing red shading.
• Plastics & Materials Science – Serves as an effective shading agent for polyamide plastics and is frequently used as a reference anionic dye in laboratory studies evaluating pollutant adsorption using bentone clays.

Packaging

Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.