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Piranha

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

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Piranha

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  1. Piranha December 13, 2011 http://web.princeton.edu/sites/ehs/labsafetymanual/cheminfo/piranha.htm

  2. Piranha Solutions • extremely energetic and may result in explosion or skin burns if not handled with extreme caution • traditionally 3:1 H2SO4 and 30% H2O2 • used to remove organic residues from substrates

  3. 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

  4. 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

  5. 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.

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