No. Conspiracy is a separate and different offense from actually possessing/distributing a controlled substance.

Conspiracy charges a person with making an agreement to achieve an unlawful objective. Distribution/possession of a controlled substance is the actual commission of the offense. In both cases, the mens rea must be alleged and proved before a person can be found guilty of criminal conduct.

Mens rea means that a person must know what they are doing to be held accountable for criminal conduct.

The elements are (i) distribution/possession of a controlled substance, and (ii) the defendant must know that they are dealing with an illegal substance.

The elements are (i) that an agreement was made between at least two people to commit an unlawful offense, and (ii) that the defendant knowingly and intentionally joined in that agreement.

No

Common sense would say no. Without knowing that the mixture or substance contains a detectable amount of a controlled substance, there can be no understanding or agreement or common intent to commit an unlawful act. In other words, there can be no unlawful common intent to commit the crime of distribution/possession of a controlled substance without knowing that the mixture in question is illegal.