Online Encyclopedia

COLCOTHAR (adapted in Romanic languag...

Online Encyclopedia
Originally appearing in Volume V06, Page 663 of the 1911 Encyclopedia Britannica.
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COLCOTHAR (adapted in Romanic languages from Arabic golgotar, which was probably a corruption of the Gr. xaXicavOos, from xnX, bs, copper, avOos, flower, i.e. copper sulphate), a name given to the brownish-red ferric oxide formed in the preparation of fuming sulphuric (Nordhausen) acid by distilling ferrous sulphate. It is used as a polishing powder, forming the rouge of jewellers, and as the pigment Indian red. It is also known as Crocus Martis.
End of Article: COLCOTHAR (adapted in Romanic languages from Arabic golgotar, which was probably a corruption of the Gr. xaXicavOos, from xnX, bs, copper, avOos, flower, i.e. copper sulphate)
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