Concentration Of Carvacrol Of 95 % Ethyl Alcohol

To a solution of Carvacrol (0.02 moles) in 95% ethyl alcohol (20 ml), concentrated hydrochloric acid (20 ml) was added. The mixture was cooled to 0-5°C and sodium nitrite (0.015 moles) was added slowly in small lots in one hour. The mixture was stirred well after each addition. The solution first became brown in colour and a green precipitate soon began to form. After 0.5 g of nitrite had been added the mixture became pasty; so the intervals between the additions were lengthened and the stirring was made more vigorous. When all the nitrite had been added, the bulk of the product was transferred to a 250 ml beaker containing 120 ml of cold water and the remainder was washed with water. After agitation with water the product became a light yellow,