Abstract: The invention relates to an aqueous well servicing fluid comprising in solution a potassium formate characterized in that said solution contains in addition potassium citrate. The potassium citrate, which can be added as a solid to a potassium formate solution, enhances the density of said fluid and minimizes any risk of caking which may be experienced if solid potassium formate is used.

Abstract: This invention relates to an animal feed composition which comprises an effective amount of an acidogenic compound selected from the group consisting of lysine, benzoic acid or a salt thereof, an alkaline earth metal salt of a mineral acid and an ammonium salt of a carboxylic acid which is capable of maintaining the pH value of the excrement of the animal so fed at or below 7 for at least 24 hours. The compound is suitably a calcium salt of sulphuric, hydrochloric or phosphoric acid or ammonium benzoate. The compound suppresses or inhibits ammonia emission in animal excreta.