Iowa Code
Chapter 191 - LABELING FOODS
Section 191.8 - Baking powder and vinegar.

191.8 Baking powder and vinegar.
Baking powder and distilled vinegar shall show on the label the name of each ingredient from which made. Distilled vinegar shall be marked as such; and cider vinegar which, having been in excess of the standard of acidity, has been reduced to the standard, shall have that fact indicated on the label.
[SS15, §4999-a31, -a31c; C24, 27, 31, 35, 39, §3070; C46, 50, §191.4; C54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §191.8]