The post-harvest stay of sugarcane in the field for 8 days led to formation of abnormal levels of reducing sugars, phenols and dextran due to post harvest modulated enhanced titrable acidities and acid invertase activities in green and burnt whole cane and their billets. These impurities are known to seriously affect the stability of sucrose, diminish the process efficiency and the raw material quality. A chemical formulation sodium dodecyl sulphate+ benzalkonium chloride [SDS+ BKC (500 + 250 ppm)] is capable of inhibiting the formation of these substances till the 8th day of stay of green or burnt whole cane or billets in the field. Its application inhibited the post harvest induced changes viz., titrable acidity and acid invertase activity in green and burnt whole cane and billets. Rise in titrable acidity was checked by 53.7 and 63.1 % in green whole and billets and by 46.7 and 56.4 % in burned whole cane and billet on the 8th days of stay in the field. The chemical formulation led to significant reduction in acid invertase activity in green whole cane and billets (by 52.7 and 50.0%, respectively) while a decline by 58.7 and 51.6 % in burnt whole cane and billets, respectively was observed. These changes led to reduction in formation of reducing sugars (by 65.7 and 63.6 % in green whole cane and billets while by 69.2 and 69 % in burnt whole cane and billets), dextran (by 77.5 and 84.52 % in green whole cane and billets while by 77.29 and 75.78 % in burnt whole cane and billets.). The chemical formulation was effective enough to limit the formation of total phenols completely till the 8th day. The inhibition of formation of the mentioned products helped in stabilizing the sucrose contents and minimized the sucrose losses significantly (by 33.2 and 36.9 % in green whole cane and billets and by 36.9 and 44.5 % in burnt whole cane and billets, respectively). The formulation can be effectively used in minimizing the post sucrose losses in the field.