PREVOST H3-41 Maintenance Manual page 115

CAUTION
Diesel Exhaust Fluid (DEF) is a nontoxic
aqueous solution of urea (32.5%) and ultra-
pure water (67.5%). Urea is a compound of
nitrogen that turns to ammonia when heated.
The fluid is non-flammable, and is not
dangerous when handled as recommended.
However, it is highly corrosive to certain
metals, especially copper and brass.
When detaching hoses and components, do
not spill DEF on disconnected or unsealed
connectors. If DEF
disconnected or unsealed connector, the
connector must be removed immediately and
replaced.
Things to know about spilt diesel exhaust fluid
(DEF):
• If urea solution comes into contact with the
skin, rinse with plenty of water and remove
contaminated clothing.
• If urea solution comes into contact with the
eyes rinse for several minutes and call for
medical help if necessary.
• If inhaled breathe fresh air and call for
medical help if necessary.
• Do not allow the DEF solution to come into
contact with other chemicals.
• The DEF solution is not flammable. If the
DEF solution is
temperatures, it breaks down into ammonia
and carbon dioxide.
• The DEF solution is highly corrosive to
certain metals,
aluminum.
• If the DEF solution is spilled onto the vehicle,
wipe off the excess and rinse with water.
Spilled DEF solution can form concentrated
white crystals on the vehicle. Rinse off these
crystals with water.
WARNING
DEF spilt onto hot components will quickly
vaporize. Turn your face away!
is spilled on
exposed to high
including copper and
PA1621 Maintenance Manual All Series | Section 04 revised Feb 2019
SECTION 04 : EXHAUST AND AFTERTREATMENT
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