Minerals and Metals in Ancient India v2.c44.s6.26

v2.c44.s6.26

Similarly Cakrapāṇi Dutta mentioned in his *Cakradatta* (AD 1050) the medicinal uses of killed iron, *mandura* or the rust of iron, *raupyamal*, the calx of silver, *kajjali* or mercuric sulphide and *tāmrayoga*, a product of sulphur and copper from Nepal. He also formulated a depilatory soap to be made by saponifying mustard oil with plant ash (potassium carbonate) and lime.