Acid Red 14 is an acid-class azo dye supplied as a water-soluble salt. It is predominantly used for dyeing and printing acid-dyeable fibers such as wool, silk and polyamide (nylon) and is valued for its bright red shades, predictable leveling behavior and reliable bath exhaustion under acidic conditions.
TRADE NAME:Acid Red B,Carmine B,Carmoisine
Standard | Fiber | Soaping | Persperation Fastness | Oxygen bleaching | Light | |
Fading | Stain | |||||
AATCC | Wool | 3 | 3 | 2-3 | 1 | 3 |
ISO | Wool | 2 | 5 | 3 | 1 | 3 |
Leveling(grade) |
Displacement |
Whitening |
Solubility(g/L) | Metal ion effect(grade) | ||
copper | iron | chromium | ||||
3~4 | B | Good | 200(100℃) | 3 | 3 | 1~2 |
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali fluff | Acid fluff | potting | soaping | Perspiration | Sun exposure | ||||
discolor | Staining | discolor | Staining | discolor | Staining | discolor | Staining | ||||||||
AATCC | wool | 2 | 4 | 1 | 1 | 2~3 | 2~3 | — | — | — | — | 3 | 3 | 2~3 | 3 |
ISO | wool | 3 | 4 | 1 | 1 | 1 | 4 | 3 | 2 | 1 | 1 | 2 | 5 | 3 | 3 |
The Barium salt can be used as organic pigment use. Also can be used in the manufacture color amylum, ink and used for leather, paper, soap, wood, electrical-controlled silver, medicine, biology and cosmetics shading.
3. It is discolored by the influence of metal salt during dyeing, so this dye is generally not used as the main dye when dyeing red.
Acid Red 14 is optimized for protein fibers (wool, silk) and acid-dyeable polyamides such as nylon. It performs poorly on purely synthetic non-polar fibers unless special carriers or mordants are used.
Acid dyes like Acid Red 14 typically give best uptake in an acidic bath. Aim for a weakly to moderately acidic pH (often around pH 3–5) and follow controlled temperature rise and dye addition to avoid streaking. Always run trials on your substrate and scale conditions to your equipment.
To deepen shade while maintaining evenness, incrementally increase dye concentration and use a leveling auxiliary designed for acid dyes. Slow, controlled addition of dye and consistent bath agitation help prevent local overdosing. If using high concentrations, check for possible dye aggregation and adjust dispersing agents accordingly.
Acid Red 14 can be formulated into printing pastes for wool and silk, but printing requires suitable binders and acidic fixation systems. For paste printing on nylon, ensure the paste pH and fixation step are compatible with the dye chemistry to secure acceptable fastness.
Lightfastness for many acid reds is moderate by nature. Consider post-dyeing treatments such as appropriate leveling/after-baths, application of lightfastness enhancing additives where compatible, and polymeric coating/finishing when product requirements demand higher durability. For wet-fastness, thorough rinsing and fixation/after-treatment with commercial wet-fastness auxiliaries are effective.
Common auxiliaries include acid buffers to control bath pH, leveIing agents to improve uniformity, dispersing agents to reduce specking at higher concentrations, and mild oxidizing or fixing aids when recommended by the auxiliary supplier. Always verify compatibility on a lab scale.
Acid dyes are water-soluble and can appear in effluent if not properly managed. Plan for dye removal or degradation in your wastewater treatment (adsorption, flocculation, biological treatment or advanced oxidation depending on local requirements) and minimize wash liquor volumes where feasible.
Store in a cool, dry place in tightly sealed containers away from direct sunlight and incompatible materials. Use appropriate PPE when handling powders or concentrated solutions, avoid inhalation and skin contact, and follow your facility’s safety data sheet (SDS) instructions.
