Iowa Code § 208A.2: What deemed adulterated.

An antifreeze shall be deemed to be adulterated if either of the following apply:

1. It consists in whole or in part of any substance which will render it injurious to the cooling system of an internal combustion engine or will make the operation of the engine dangerous to the user.

2. Its strength, quality, or purity falls below the standard of strength, quality, or purity under which it is sold.