Description
Dextrin yellow (yellow dextrin) is a partially hydrolysed, roasted starch product that appears as a yellow to light brown, free‑flowing, water‑soluble powder with low to medium viscosity and a slightly sweet to neutral taste. It is produced by controlled heat and often acid treatment of starch (typically corn, potato, wheat or tapioca), which shortens the starch chains and imparts the characteristic yellow colour and strong adhesive properties.
Key properties
Physical form: Yellow to light brown hygroscopic powder; completely soluble in water forming a viscous solution.
Chemistry: Mixture of low‑molecular‑weight polysaccharides (dextrins) derived from starch; biodegradable and generally non‑toxic.
Functional traits: Strong adhesive/binding capacity, film‑forming, mild thickening, good compatibility with cellulosic materials (paper, textiles, biomass).
Major industrial uses
Adhesives and paper/packaging:
Water‑soluble glue for envelopes, labels, stamps, gummed tapes, paper tubes, corrugated cartons and general paper/carton lamination.
Binder in paper and board coatings and in printing applications such as batik resist pastes and gouache paints.
Foundry and mining:
Binder and green‑strength additive for sand molds and cores in metal casting; improves dry strength while remaining water‑soluble for easy shake‑out.
Additive in froth flotation processes in mining to modify surface properties and aid separation.
Textiles, leather, and coatings:
Sizing and finishing agent to impart stiffness and better handle to fabrics; thickener in textile printing pastes.
Binder in leather and paint formulations, including gouache and certain water‑based coatings.
Other applications:
Binder in briquetted biomass and fuel pellets to improve mechanical strength and reduce breakage while remaining combustion‑neutral.
Component in some food, pharmaceutical, and cosmetic formulations (where food/pharma grade), acting as a mild thickener, stabilizer, or tablet binder, although white dextrin is more common for food use.
For your catalog, you can describe dextrin yellow as a water‑soluble, roasted starch‑based adhesive/binder powder used mainly in paper/packaging, foundry cores, briquette binding, textiles, and printing, emphasizing its strong bonding, biodegradability, and ease of handling.