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Most aerosol dry shampoos available on the market use hydrocarbon propellants (gases) and ethanol at varying levels to deliver the product to the hair. “Most hydrocarbon aerosol propellant mixtures are composed of propane, n-butane, and is o-butane, and due to their source materials are likely to contain benzene as an impurity.

Read more: https://healthgroovy.com/benzene-free-dry-shampoo/