This pill with imprint "C 2" is White, Round and has been identified as Clonazepam 2 mg. Pipeline, Clinical Trials, Care Notes, Encyclopedia, Dictionary, Natural Products Clonazepam 2 mg is classified as a Schedule 4 controlled substance under the Controlled Substance Act (CSA). Get help with Imprint Code FAQs. Having trouble identifying your pills? Enter the shape, color, or imprint of your prescription or OTC drug. Our pill finder will display pictures that you can compare. Klonopin, a benzodiazepine, is available as scored tablets with a K-shaped patients with absence seizures (petit mal) who have failed to respond to.