Liquor Saponis Aethereus, B.P.C. Ethereal Soap Solution.
Synonyms.—Ether Soap; Solutio Saponis Aetherea.
|Oleic Acid||35.00|||||7 fl. ounces|
|Potassium Hydroxide Solution, saturated, a sufficient quantity.|
|Alcohol||15.00|||||3 fl. ounces|
|Oil of Lavender||0.20|||||20 minims|
|Methylated Ether (s.g., 0.720)||to 100.00|||||to 20 fl. ounces|
Mix the oleic acid and alcohol and neutralise with the saturated solution of potassium hydroxide in water (1 in 1), of which nearly 7.5 (1 ½ fluid ounces) will be required, using phenolphthalein as indicator. Allow the neutralised product to cool, and add the oil and ether.
Ethereal soap solution should be kept in well-stoppered bottles.