Acid Yellow 73

Acid Yellow 73 Soluble in water and ethanol (with strong green fluorescent), water-soluble good. In strong sulfuric acid with weak for fluorescence yellow, it will be diluted with yellow precipitation. Its water solution and sodium hydroxide with dark green fluorescence for brunet solution.

TRADE NAME:Acid Fluorescent Yellow 10GFF,Acid Fluoresceine GDC,Acid Umnine H/Cottc,Acid Fluorescent Yellow GDC,WAbbey Uranine Liq,Abbey Uranine Pdr,ABCOL Uranine

Key properties

• Type: Acid (anionic) dye suitable for protein fibers and nylon
• Form: Powder/granules — easily dispersible in water
• Shade: Bright to medium yellow
• Substantivity: Moderate — good exhaustion with acid auxiliaries
• Leveling: Good leveling and evenness under controlled conditions
• Fastness: Moderate wet fastness; lightfastness varies by shade and substrate
• pH preference: Performs best under acidic conditions
• Compatibility: Compatible with standard acid mordants and leveling agents
• Applications: Textile dyeing (wool, silk, nylon), leather and sample tinting
• Packaging: Typical packing 25 kg bags or smaller lab packs

Technical Specifications

• ‍CAS NO: 518-47-8
• CI.NO: 45350
• Molecular Formula: C20H10Na2O5
• Molecular Weight:376.27
• Shade: Brilliant yellow‍

Application:

• ‍Mainly used for sea of target that fluorescent, facilitate aerial reconnaissance search. 
• And can use significantly for the exploration of fluorescent groundwater. 
• Can also be used for medicine and cosmetics shading, rarely used for silk printing and dyeing things.‍

FAQ

What fibers are best dyed with Acid Yellow 73?

Acid Yellow 73 is optimized for protein fibers such as wool and silk and for polyamide fibers like nylon. It binds via ionic interactions under acidic dyeing conditions to produce clear yellow shades.

What pH and bath conditions give the best results?

Acid dyes perform in acidic baths. Typical industrial practice targets an acidic range (commonly low pH) and gradual temperature rise to help even exhaustion. Exact pH and temperature depend on the fiber and equipment—refer to the supplier technical data sheet for recommended ranges.

How do I improve leveling and avoid streaks?

Use slow addition of dye, proper liquor ratio, and an appropriate leveling or dispersing auxiliary. Gentle agitation and controlled temperature rise reduce local over-exhaustion; pre-wetting the goods improves even uptake.

What are the expected fastness properties?

Fastness varies with substrate and finishing. Expect moderate wet fastness and variable lightfastness; post-treatments (fixing agents, mordants, or washing procedures) can improve performance for specific end-uses.

Can Acid Yellow 73 be blended with other dyes?

Yes — it can be mixed with compatible acid dyes to achieve custom yellow tones or to modify fastness. Test blends in lab trials to confirm shade match and fastness before production runs.

Is special handling or safety equipment required?

Standard chemical handling precautions apply: use eye protection, gloves and dust control when handling powder. Avoid inhalation and prolonged skin contact. Consult the product SDS for full safety, transport and disposal guidance.

What form does the dye come in and how should it be stored?

Commonly supplied as powder or granules in sealed bags. Store in a cool, dry, well-ventilated area away from strong oxidizers and moisture; keep packaging tightly closed to prevent caking and contamination.

Can I use Acid Yellow 73 for automotive or outdoor textiles?

Acid dyes are primarily for indoor textile uses (apparel, interior fabrics) and nylon applications. For outdoor or high-sunlight exposure products, evaluate lightfastness and consider pigment or specialized disperse dyes that offer superior outdoor fastness.