a number expressing the acidity of a substance, equal to the number of milligrams of potassium hydroxide needed to neutralize the free fatty acids present in one gram of the substance.
The saponification number and acid number are both very low, but a fatty oil is present.
The Propaganda for Reform in Proprietary Medicines, Vol. 2 of 2 Various
- Acid perfusion test
acid perfusion test acid perfusion test n. See Bernstein test.
- Acid phosphatase
acid phosphatase acid phosphatase n. A phosphatase with optimum functioning at pH 5.4 and present in the prostate gland.
- Acid phosphate
(def 1). Historical Examples The fertilizers that I get more inquiries about than any others are the phosphates—bone meal, acid phosphate and rock phosphate. Trees, Fruits and Flowers of Minnesota, 1916 Various To furnish the phosphoric acid he can buy 1,786 pounds acid phosphate. The First Book of Farming Charles L. Goodrich Either ground bone […]
- Acid precipitation
meteorological precipitation that is relatively acidic. acid precipitation Any form of precipitation, including rain, snow, hail, fog, or dew, that is high in acid pollutants, especially sulfuric and nitric acid. Acid precipitation has a pH of less than 5.6 (the normal acidity of unpolluted atmospheric water) and is often less than pH 5.0. Also called […]