Black Cocaine Drug

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Context

The Narcotics Control Bureau (NCB) arrested a Bolivian woman from Mumbai airport for allegedly carrying black cocaine Drug.

What is Black Cocaine?

“Black cocaine”, a rare drug, is a mixture of regular cocaine and other chemicals of administrated quantity. In a bid to ensure that sniffer dogs used at airports do not detect cocaine, it is being used by drug peddlers coming to India from South American countries.
It neutralises the smell of cocaine so that it can pass through checkpoints easily.
Black cocaine is a mixture of regular cocaine base with various substances to camouflage typical appearance (e.g. charcoal), to interfere with colour-based drug tests (cobalt salts form deep red complexes in solution), to make the mixture undetectable by drug-sniffing dogs as activated carbon may sufficiently absorb trace odours.
The pure cocaine base is then recovered from the mixture by extraction using common organic solvents such as methylene chloride or acetone. A second process is required to convert the cocaine base into powdered cocaine hydrochloride.