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.

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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 H2SO4 and 30% H2O2
• 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.

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