We don't have synonyms for pearlash yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pearlish, pearl-ash and pearl ash.
(n) :
(organic chemistry) A white amorphous or granular substance which consists principally of potassium carbonate and has a strong alkaline reaction. It is obtained by lixiviating wood ashes and evaporating the lye, and has been an important source of potassium compounds. It is used in making soap, glass, etc.
(n) :
(organic chemistry) A white amorphous or granular substance which consists principally of potassium carbonate and has a strong alkaline reaction. It is obtained by lixiviating wood ashes and evaporating the lye, and has been an important source of potassium compounds. It is used in making soap, glass, etc.