Mo. Rev. Stat. § 579.055: Manufacture of a controlled substance — penalties.

1. A person commits the offense of manufacture of a controlled substance if, except as authorized in this chapter or chapter 195, he or she:

(1) Knowingly manufactures, produces, or grows a controlled substance;

(2) Attempts to manufacture, produce, or grow a controlled substance; or

(3) Knowingly possesses a controlled substance with the intent to manufacture, produce, or grow any amount of controlled substance.

2. The offense of manufacturing or attempting to manufacture any amount of controlled substance is a class B felony when committed within two thousand feet of the real property comprising a public or private elementary, vocational, or secondary school, community college, college, or university. It is a class A felony if a person has suffered serious physical injury or has died as a result of a fire or explosion started in an attempt by the defendant to produce methamphetamine.

3. The offense of manufacturing or attempting to manufacture any amount of a controlled substance, except thirty-five grams or less of marijuana or synthetic cannabinoid, is a class C felony.

4. The offense of manufacturing thirty-five grams or less of marijuana or synthetic cannabinoid is a class E felony.