PIRANHA DECEMBER 13 2011 http web princeton edusitesehslabsafetymanualcheminfopiranha

PIRANHA DECEMBER 13, 2011 http: //web. princeton. edu/sites/ehs/labsafetymanual/cheminfo/piranha. htm

PIRANHA SOLUTIONS • extremely energetic and may result in explosion or skin burns if not handled with extreme caution • traditionally 3: 1 H 2 SO 4 and 30% H 2 O 2 • used to remove organic residues from substrates

HANDLING PIRANHA • Always use glass (preferably Pyrex) containers • Prepare in a hood; wear rubber gloves and eye protection • Always add the hydrogen peroxide to the acid • The mixture is likely to become hot (>100 ºC); handle with care

HANDLING PIRANHA • Leave the hot solution in an open container until cool • Mixing hot piranha with organic compounds (such as acetone, isopropyl alcohol and photoresists) might cause an explosion • Never store piranha solutions, mix fresh solution for each use

EMERGENCY PROCEDURES • In case of skin contact, flush the skin with copious amounts of water for at least 15 minutes. Seek medical attention. • In case of eye contact, flush contaminated eye(s) immediately with copious quantities of water for at least 15 minutes. Seek medical attention immediately.