French term (edited): désaltération longue durée

Actually, in your particular case, I think you can indeed use it as a noun in its own right; since it is qualified by 'long-lasting', it makes it clear enough that it is being used as a noun — and don't let's forget that all this comes after 'promesses'; it would be hard to see how you could really say: "its promises of ... long-lasting thirst-quenching properties"

Hello,

My try...

I hope this helps.

This seems to be the expression most widely used, lots and lots of ghits in inverted commas.

Some random examples:

"Water should be drunk little but often throughout the day such that we are never thirsty. It is particularly important to hydrate last thing at night to prepare for the significant loss of water during sleeping and rehydrate first thing in the morning as this is a time when the blood is most viscous and strokes particularly prevalent. We should also drink before, during and after exercise to maintain our level of hydration. The thirst-quenching ability of soft drinks has been assessed [964]. Acidity was found to be the taste attribute most closely related with thirst-quenching with sweetness and ‘thickness’ (viscosity) being the most contra-indicated."

http://www1.lsbu.ac.uk/water/health.html

http://informahealthcare.com/doi/abs/10.3109/155695289090629...

http://www.exchange4media.com/PEOPLEMOVEMENT/MOVEMENT_FULLST...