Question

what are the chemicals used in preparing henna

Answer 1

Henna leaves contain up to 5% by weight of the compound, which, in its pure form, is a yellow-orange powder that does not dissolve in water. Henna paste is prepared by mixing crushed dry henna leaves with a mild acidic ingredient. Vora uses lemon juice. The acid releases the lawsone from the plant.

Answer 2

henna powder may be derived from indigo. It may also contain unlisted dyes and chemicals such as para-phenylenediamine (PPD), which can stain skin black quickly, but can cause severe allergic reactions and permanent scarring if left on for more than 2–3 days.