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“CONCERTA® (methylphenidate HCl) Structural Formula – Illustration” Methylphenidate HCl USP is a white, odorless crystalline powder. Its solutions are acid to litmus. It is freely soluble in water and in methanol, soluble in alcohol, and slightly soluble in chloroform and in acetone. Its molecular weight is 269.77. CONCERTA® also contains the following inert ingredients: butylated hydroxytoluene, carnauba wax, cellulose...