PDF ISSN 2347 3258 International Journal of Advance Research and ... IJARI
6. Presence of oil soluble coal tar: 5 ml of ether solvent was added to a test tube containing chilli powder and is shaken well. 2ml of dilute hydrochloric acid was taken in another test tube and ether layer is transferred to it. Appearance of pink/red colour of lower acid layer indicate the presence of oil soluble coal tar. Turmeric ...