AdBlue is a brand name for a solution used in Selective Catalytic Reduction (SCR) technology to reduce harmful nitrogen oxide (NOx) emissions from diesel engines. It's a colorless, odorless, and non-toxic liquid primarily composed of 32.5% urea (a nitrogen-based compound) and 67.5% deionized water.

How it works:

1. SCR System: AdBlue is injected into the exhaust system of diesel vehicles.
2. Chemical Reaction: When heated, AdBlue breaks down into ammonia (NH₃), which reacts with nitrogen oxides (NOx) in the exhaust gases, converting them into harmless nitrogen (N₂) and water vapor (H₂O).
3. Emission Reduction: This process significantly reduces the harmful emissions that contribute to air pollution and smog.

AdBlue is used in a wide range of vehicles, including trucks, buses, and some passenger cars that comply with modern emission standards like Euro 6.

Key Points:

• Environmentally Friendly: Reduces NOx emissions, helping to meet stringent environmental regulations.
• Regular Refills: It's stored in a separate tank in the vehicle, and the driver must ensure it's regularly topped up, as running out of AdBlue can cause the vehicle to enter a reduced power mode or not start at all.
• Storage: It should be kept in a cool, dry place and not exposed to temperatures below -11°C or above 30°C, as extreme temperatures can affect its efficacy.

AdBlue is widely available at fueling stations, auto retailers, and service centers, and its use is required in many modern diesel-powered vehicles that employ SCR technology.