White powder?

Question

What's a white powder that has a large grain appearance, grainy texture, no smell, soaks up water, turns orange in iodine, and becomes cloudy when five grams of it is mixed into twenty-five milliliters of water? I was thinking cornstarch or baking soda... Thanks.

Answer 1

I'm not sure what the powder is from the description. However, cornstarch would turn blue/black in iodine, not orange.

Answer 2

I'm not sure either. But it's neither. Cornstarch would turn blue in iodine, and baking soda would'nt change its color at all.