Wyo. Stat. § 40-7-110: Antifreeze must be approved by state chemist.

No antifreeze dealer shall sell or offer for sale any antifreeze product which has not been approved by the state chemist and registered with the department on forms prescribed by the department. Registration forms shall only be submitted by a manufacturer. Registration does not expire, but a registration shall be amended to reflect any changes in product formulation or product package labeling.