Posted By Karen Todd
AdBlue is urea solution, in your particular application is employed as a reductant in Selective Catalytic Reduction (SCR).

Urea solution is injected into the exhaust gas from diesel engines to reduce NOx emissions.

Some reduction in particulate matter emissions will also observed even if no particulate trap is fitted.

Fuel has to be ULSD to prevent degradation of the catalyst.

Bottled ammonia gas can also be used as a reductant but urea is favoured due to its lower health and safety risks.

Amongst others, industrial uses of urea include:-

· Component of fertilizer and animal feed-cheap source of fixed nitrogen

· Alternative to rock salt for deicing roads/runways

· Ingredient in hair conditioners, facial cleaners, bath oils, lotions

· A flame proofing agent



From the supplied MSDS I had (when used properly according to directions), the following is noted:-

Product is not classified according to EU legislation, i.e. no risk phrases
product not defined as hazardous waste
no adverse health effects
product not expected to harm environment

If a spill occurs; in soils, urea degrades rapidly, usually within 24 hours. Ultimate degradation products are carbon dioxide and ammonia.

In water, biodegradation to carbon dioxide and ammonia is the major fate pathway.

Urea is non-toxic to aquatic organisms, bioaccumulation of urea is also extremely low.

If urea is being dispensed from a pump system similar to that employed for diesel fuel, problems should not arise during normal usage.

To prevent potential spills, it may be prudent to site bulk urea storage tank above ground in a bunded area.

Chemical usage on any site, should consider implications of COSHH regulations and undertake a site specific risk assessment (if necessary), although this should result in a very low risk situation prevailing with no specific control measures identified.

However, on the MSDS Section 10 I had: Stability and Reactivity-Urea reacts with calcium- and sodium hypochlorite forming EXPLOSIVE nitrogen trichloride (reacts with air)-also highly reactive or incompatible with oxidizing materials, acids and alkalis.

If the bulk container used for urea storage is to be cleaned, careful selection and usage of cleaning materials is essential.

KT

Posted By TK
I've just recently done a COSHH assessment on it.

Let me know if you want a copy.

Thomas

Posted By TK
The MSDS I have says:

"Avoid contamination with oxidising agents or strong acids as ignition may result."

You could argue segregation is necessary particularly if you have other incompatible substances on site.

Also spilled product may cause slippage. Best to contain to prevent spills rather than wait for inevitable falls.

Lastly you'd say what your drainage set up is but any unauthorised discharge could land you in trouble.

Thomas