free base


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free base

A highly addictive form of cocaine consumed by smoking. It is prepared by alkalinizing the hydrochloride salt, extracting it with an organic solvent such as ether, and then heating the extract to 90°C. The inhaled material is rapidly absorbed from the lung.
See: cocaine hydrochloride; crack; freebasing
References in periodicals archive ?
The structures of free base porphyrin (TPP), tetraphenylporphyrin indium(III) chloride (TPPIn-Cl), and tetraphenylporphyrin indium(III) phenolates (TPPIn-X) have been characterized by UV-Vis and the spectral data.
Known to some users as "crank," the mysterious substitutes may contain free base residue, concentrated caffeine, amphetamines, prescription stimulants, or any combination thereof.(10) A recent entry to this substitute market is pemoline, a potent central nervous system stimulant used for the treatment of attention-deficit disorders.(11)
A few pages further in the chapter on free base, the authors claim, however, that
Since both peaks represent the glucosamine, the sum of the areas of the two peaks is used to quantify the glucosamine free base. Then, with the salt version known a simple calculation gets you the product's assay.
It's an oil free base cream which helps combat wrinkles, fine lines and enlarged pores to leave skin refreshed and looking as smooth as silk.
The free base analyzed by this method was not Me6-MP per se but a compound formed during the hydrolysis step.
Edoxaban, the free base of DU-176b, is an oral anticoagulant that directly inhibits Factor Xa, an important factor in the coagulation process.
This will give the roots a contamination free base, which should enable them to flower satisfactorily.
Riser has been organised by the Free Base Organisation - a group of citywide college and university students who raise money for charity.
Jim Johnstone, chairman of the National Association of Accordion and Fiddle Clubs, said: "The five- row continental accordion with a free base is used by many students of music and it has nothing to do with a piano keyboard.