Rochelle salt

noun

Chemistry, Pharmacology.

a colorless or white, water-soluble solid, KNaC 4 H 4 O 6 ⋅4H 2 O, used in silvering mirrors, in the manufacture of Seidlitz powders and baking powder, and in medicine as a laxative.

Rochelle salt

a white crystalline double salt, sodium potassium tartrate, used in Seidlitz powder. Formula: KNaC 4 H 4 O 6 .4H 2 O

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First recorded in 1745–55; after La Rochelle

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C18: named after La Rochelle , French port

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Examples have not been reviewed.

In using the baking powder prepared according to my formula, you have in your bread Glauber instead of Rochelle salts.

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This acid, united to the mineral alkali, makes Rochelle salt.

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Rochelle salts and seltzer aperient are given dissolved in water; the ordinary dose is from one to four teaspoonfuls.

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Itching often disappears after a good saline cathartic has acted—Rochelle salts, solution of magnesia citrate, or phosphate of soda.

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In another vessel dissolve pure Rochelle salt to the amount of 2.6 w, and make up the solution to the volume v.

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