What are the possible adulteration and possible deterioration of Curcuma longa (Turmeric) ?

Turmeric powder can be adulterated in many different ways: Curcuma longa (Turmeric) is a strong base and is used as a domestic product.

The possible adulteration and deterioration of Curcuma longa are as follows:

It can be mixed with chalk powder which results in production of small bubbles. When turmeric powder is mixed with water, it produces some streaks of soluble colour in water that is caused as a result of adulteration of lead chromate in turmeric powder.