What is the ruling on using cream of tartar powder, knowing that it is a white chemical substance obtained during the fermentation stages of grapes, and it resembles baking powder in its use and effect in solidifying doughs and baked goods?

Tartar powder, which is a salt precipitated from wine and intoxicants, is pure and permissible (halal (definition)) if the reason for its prohibition, which is intoxication, is removed. This is because a ruling revolves around its cause, whether in existence or absence. So, if wine transforms into a non-intoxicating salt, it becomes permissible, just as it would if it transformed into non-intoxicating vinegar. If the powder intoxicates when dissolved, then it is forbidden; otherwise, there is no harm in using it.