a colourless soluble hydrated double sulphate of aluminium and potassium used in the manufacture of mordants and pigments, in dressing leather and sizing paper, and in medicine as a styptic and astringent. Formula: K2SO4.Al2(SO4)3.24H2O
2.
any of a group of isomorphic double sulphates of a monovalent metal or group and a trivalent metal. Formula: X2SO4.Y2(SO4)3.24H2O, where X is monovalent and Y is trivalent
Word origin
C14: from Old French, from Latin alūmen
Examples of 'potash alum' in a sentence
potash alum
Potash alum showed most favourable results.
Gagandeep Kansal, Sangeeta Goyal, Veneet Mehta, Reeta Jain, Rajnish Jindal, ManmeetKaur Bagga 2019, 'Effect of medicaments on the kinetic absorbency of retraction cord', Indian Journal of Dental Scienceshttp://www.ijds.in/article.asp?issn=0976-4003;year=2019;volume=11;issue=1;spage=17;epage=19;aulast=Kansal. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)