What Is Vitex Starch What Is Soluble Starch And What Is Vitex Starch?

What is soluble starch and what is vitex starch? - what is vitex starch

Since dissolves soluble in water, but what is it? Liquid starch fit into this category, such as laundry starch? Because I am the Briggs-Rauscher oscillating reaction and color change demands that the soluble starch Vitex .......... what is the differnce between the two is the same as laundry starch, and if not, where can I get a 2?