The potency of norbixin as an active compound of natural dye in textile industry

One-step ultrasound-assisted recovery of yellow-orange-red natural coloring from defatted annatto seeds: A cleaner processing alternative

“…However, this compound is isomerized to its trans form named norbixin by heating [3] , [40] . Norbixin is a water-soluble colorant compound that has been acquired from annatto seeds through aqueous alkaline extraction to produce natural dye for the textile industry [41] . Due to the temperature generated by the HIUS-extraction process, bixin can be isomerized into norbixin.…”

“…However, the presence of this compound in the colorant would not be a problem; it could even increase its solubility in water. On the contrary, if higher extraction temperatures are used (>70 °C) and the heating of the annatto extracts is prolonged, degradation compounds may form in the colorant [41] .…”