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Rather than requiring the more volatile method of processing cocaine using ether, rock cocaine (also called crack) is processed with ammonia or sodium bicarbonate (baking soda) and water and heated to remove the hydrochloride, thus producing a form of cocaine that can be smoked.

Definition of Rock (drug) - MedicineNet

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Definition of Rock (drug) - MedicineNet

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Rather than requiring the more volatile method of processing cocaine using ether, rock cocaine (also called crack) is processed with ammonia or sodium bicarbonate (baking soda) and water and heated to remove the hydrochloride, thus producing a form of cocaine that can be smoked.