Acid Red 172 is a water-soluble anionic dye formulated for acidic dyeing processes. It produces vivid, transparent red shades with strong tinting strength and good compatibility across protein and polyamide fibers. Designed for industrial textile and leather applications, Acid Red 172 offers reliable batch reproducibility and predictable leveling when used under recommended acidic conditions.
TRADE NAME:Weak Acid Brilliant Red 3B,Brilliant Red 2B,Weak acid red 3B
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
AATCC | Wool | 4-5 | 4-5 | 4 | 5 | |
ISO | Wool | 4-5 | 4-5 | 5 | 4-5 | |
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali shrinkage | Acid shrinkage | Seawater discoloration | Soaping discoloration | Perspiration | Sun exposure |
AATCC | wool | 4 | 5 | — | 4 | 3 | 3 | 4~5 | 4~5 | 4~5 | 5 |
ISO | wool | 3 | 5 | 5 | 5 | 4 | 4 | 4~5 | 4~5 | 4~5 | 4~5 |
Mainly used for wool, silk and polyamide fiber fabric dyeing and printing, can discharge, also can be used to color film.
20 or 25kg/compound bag, carton box, iron drum, fiber durm for powder dye and 1000kg/tank for liquid dye.
Acid Red 172 shows highest affinity for protein fibers (wool, silk) and polyamide (nylon). It can be used on blends when the protein/polyamide fraction is substantial; for pure cellulosic substrates, pre-mordanting or different dye classes are recommended.
Best uptake is obtained under acidic conditions. In practice dyebath pH is usually adjusted to the acidic range (for example using acetic acid or formic acid) to maximize exhaustion and leveling. Exact pH depends on fiber type and process — most dyehouses work in the pH 2–5 window for optimum performance.
For deeper shades use stepwise addition and maintain gentle liquor circulation to avoid local overdosing. Pre-dissolve the dye in hot water, add slowly at controlled temperature rise, and consider a short leveling hold (low agitation) before raising temperature to fixation — this reduces local concentration spikes that cause streaks.
Fixation depends on fiber: wool and silk often require a controlled temperature rise to near-boiling for full exhaustion; nylon typically benefits from higher temperature fixation. Continuous and pad-batch methods will use longer dwell times at moderate temperatures. Trial on mill equipment is essential to optimize time/temperature for your substrate and machinery.
Yes — it blends well with standard acid dye auxiliaries (levellers, wetting agents, pH buffers) and can be mixed with other acid dyes for shade tuning. Avoid mixing with strongly cationic products that may alter exhaustion behavior unless the process is specifically designed for cationized substrates.
Washing and wet fastness are generally good for protein/polyamide fibers when the dye is properly exhausted and rinsed. Lightfastness is shade-dependent; deepen shades may show reduced lightfastness. Improving fixation (optimum pH/temp), post-treatment with appropriate fixatives or after-washing with polymeric auxiliaries can enhance fastness.
Store the dye in a dry, ventilated area in original sealed packaging. Avoid moisture uptake which can promote caking. Use standard PPE when handling powders (dust mask, goggles, gloves) and follow local regulations for transport and disposal.
Yes — Acid Red 172 is suitable for leather; application method and pH control are critical. Leather dyeing often requires lower liquor ratios and specific penetration control; small pilot trials should define the right dyebath composition and post-fatliquoring steps to preserve hand feel.
