"777 oil" is a code drug of the Siddha system of medicine used in the treatment of Psoriasis. The drug is derived from the leaves Wrightia tinctoria by insolation, with coconut oil as base. The present study is aimed at comparing the drug prepared by insolation with that prepared in darkness.Analytical studies carried out in both the drugs showed difference in acid number without exposing to sunlight. The drugs showed changes in acid and iodine numbers on exposure to sunlight.Studies on Thin Layer Chromatography showed no difference between the two drugs. However semi quantitative chromatography showed that two spots were more in concentration in the drug prepared in darkness than the drug processes in sunlight. Except one spot all the spots Rf values are identical to raw coconut oil.In analytical studies carried out in shade dried leaves of Wrightia tinctoria showed the presence of iron calcium and ammonium. Alcohol had maximum extractive matter.
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