An alizarin is a substance extracted from the root of the herbaceous plant Rubia tinctorum, with a distinctive red-purple colour, or a dye obtained from this plant.

asking yellow

E32636

The compound traditionally used for calico printing is a type of synthetic dye called alizarin. Alizarin provides bright and vibrant colors that are suitable for printing on fabrics. However, modern calico printing may also involve the use of other synthetic dyes and pigments.

yes. it is an acidic dye.....