BOSTON — Massachusetts marijuana regulators are preparing to vote on the licensing of two independent testing labs - an action that could move the state closer to its first recreational pot sales.

The Cannabis Control Commission is set to consider license applications from CDX Analytics, of Salem, and MCR Labs, of Framingham, at their Thursday meeting.

The panel already has approved retail licenses for several medical marijuana dispensaries. None of those can begin selling recreational marijuana products until they're tested for potential contaminants by a licensed independent lab.

It's among several factors that have been holding up the opening of retail pot shops in Massachusetts, something that had originally been supposed to happen around July 1.

The state's voters legalized recreational marijuana for adults in November 2016.

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