GL 320 BLUETEC (164.825) V6-3.0L DSL Turbo (642.820) (2009)
Diesel Emissions Fluid: Hazardous Materials Handling and Disposal
AH14.40-N-0001-01AB Notes on use, material properties and handling of AdBlue
ENGINE all
Concept
AdBlue is the trade name for the diesel engine NO x reducing agent with the standardized designation ISO 22241.
Tasks of AdBlue
AdBlue serves to convert nitrogen oxides into water vapor and nitrogen.
Chemical characterization and composition of AdBlue
The urea content is 32.5%. AdBlue consists of urea dissolved in demineralized water. AdBlue is not an additive.
Chemical formula: H N-CO-NH
22 Molecular weight (urea): 60.06 g/mol
CAS (Chemical Abstracts-Service) No.: 57-13-6
Physical and chemical properties of AdBlue
Status: liquid
Color: colorless, clear, light yellow
Odor: slight ammonia smell
pH value: 10 (hydrous solution, 10%)
Crystallization temperature: -11°;C/12°F
Boiling point: 103°C/217°F
Self ignition temperature: not self igniting
Density: about 1.09 g/cm3 at 20°C/68°F
Viscosity, dynamic: about 1.4 mPas at 25°C/77°F
Working with dirty materials
One must, at all costs, prevent AdBlue from coming into contact with materials used in the interior of the vehicle. AdBlue exposed to air passes within
just a few hours from a liquid state into the crystalline state and can therefore damage and destroy contaminated surfaces. Textiles, e.g. the anti-slip mats,
which have been fouled with AdBlue should be cleaned a number of times in rotation and flushed with water. One must ensure that there are no further
traces of AdBlue in the textiles.
Working with dirty tools
All tools coming into contact with AdBlue must be thoroughly
cleaned immediately after use using water!
Only fully dried measuring instruments and filing tools should be
used so as not to dilute the AdBlue concentration.
Working life and durability
AdBlue breaks downs during storage into ammonia hydroxide and carbon dioxide and then no longer fulfills the requirements of the standard ISO
22241. If the recommended storage temperature of a maximum of 25°C/77°F is maintained, the AdBlue will fulfill the requirements of this
standard for at least 18 months after manufacture. If this recommended storage temperature is exceeded then this period is reduced. Duration of storage
and the temperatures to be used are given as guideline values at the end of the document. At temperatures under -11°C/12 °F the AdBlue
freezes and becomes solid. On warming up again the frozen AdBlue becomes liquid again and can be reused without any loss of quality. The maximum
permissible period of use of AdBlue can be taken from the MB Specifications for Operating Fluids .
Marking
Filling plant for discharging AdBlue is marked with the standard designation ISO 22241 or with the trade designations AdBlue or Diesel Exhaust Fluid
(DEF).
Transport
AdBlue is carried in a container for vehicles with BlueTEC technology.