C.R.S. § 8-20-804: When deemed adulterated.

(1) An antifreeze shall be deemed to be adulterated:

(a) If it consists in whole or in part of any substances which will render it injurious to the cooling system of an internal combustion engine or will make the operation of any internal combustion engine dangerous to the user; or

(b) If its strength, quality, or purity falls below the standard of strength, quality, or purity under which it is sold.