PRECAUTIONS FOR DEF
GENERAL CHARACTER AND PRECAUTIONS FOR HANDLING
DEF is a colorless transparent 32.5% aqueous urea solution. Urea as main constituent is a material which is
used for cosmetics, medical and pharmaceutical products, and fertilizer, etc. The following situations require im-
mediate action:
• If it gets on your skin, it may cause inflammation. Immediately take the contaminated clothes or shoes off
and wash it off with water. In addition, use a soap to wash it off thoroughly. If your skin becomes irritated or
begins to hurt, immediately consult a doctor for treatment.
• Do not induce vomiting if swallowed. If swallowed, thoroughly rinse mouth with water and consult a doctor
for treatment.
• Avoid contact with the eyes. If there is contact, flush with clean water for several minutes and consult a doc-
tor for treatment.
• Wear protective eyeglasses when exposed to DEF to protect from solution splashing in your eyes. Wear
rubber gloves when you perform work handling DEF to avoid skin contact.
PRECAUTIONS FOR ADDING
Do not put fluid other than DEF into DEF tank. If diesel fuel or gasoline is added into the tank, it can cause a
fire. Some fluids or agents added can create and emit a toxic gas.
When opening the cap of DEF tank of the machine, the ammonia vapor may escape. Keep your face away from
the filler port during opening or refilling.
PRECAUTIONS FOR STORING
If the temperature of DEF becomes high, harmful ammonia gas may be generated. Completely seal up its con-
tainer for storage. When opening the container, perform it where there is good ventilation. For storage, see
“STORE DEF (00-41)”.
Store DEF avoiding direct sunlight. Always use the original container at the time of purchase. Do not exchange
the container of DEF with another one. If DEF is stored in an iron or aluminum container, toxic gas may develop
and a chemical reaction may corrode the container.
PRECAUTIONS FOR FIRE HAZARD AND LEAKAGE
DEF is non-flammable; however, in the case of a fire it may generate an ammonia gas. Act on the base of “Ac-
tions if fire occurs”.
If DEF is spilled, immediately wipe and wash the area with water. If spilled DEF is left unattended and the area
is not wiped and cleaned, toxic gas or corrosive substance may be produced by chemical reactions.
THE OTHER PRECAUTIONS
When disposing of DEF, treat it as an industrial waste. For the waste treating method, refer to “Precautions for
disposing of waste materials”. It should be treated in the same way.
Never use an iron or aluminum container when disposing DEF fluid, because toxic gas may develop and a
chemical reaction may corrode the container. Use a container made of resin (PP, PE) or stainless steel when
handling the fluid waste of DEF.
Do not touch any fluid discharged from urea SCR. This fluid becomes acid by the influence of sulphur in the fuel
or built-in oxidation catalyzer. If it gets on your skin, thoroughly wash it off with water.
Never relocate or modify the exhaust gas after-treatment device. The harmful gas may be exhausted and it can
cause serious damage to the environment as well as violation of laws.
PRECAUTIONS FOR DEF
00 INDEX AND FOREWORD
00-40
PC290LL-11
