| http://www.w3.org/ns/prov#value | - itric acid, lactic acid, and sulphonic acids. [0615] Mention may be made, among basifying agents, by way of example, of ammonia, alkaline carbonates, alkanolamines, such as mono-, di- and triethanolamines, and their derivatives, sodium hydroxide, potassium hydroxide and the compounds of formula (VI): [0616] wherein W is a propylene residue optionally substituted by at least one entity
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