The present invention relates to a simple, direct and cost-effective process for the preparation of agarose of high gel strength and low gelling temperature from naturally occurring or cultivated Gracilaria spp. more particularly Gracilaria dura, said process comprising steps of pre-treating the dry seaweed with alkali, rinsing the pre-treated seaweed until the washing shows a pH ranging between 7 and 8, adding water, autoclaving to obtain extractive, treating the extractive with charcoal and Celite to obtain hot extractive, vacuum-filtering the hot extractive over a Celite bed, freezing the filtrate into a mass and thawing the mass, redissolving the mass in water by heating in an autoclave, repeating the freeze-thaw cycle, straining the product to remove thawed liquid and thereafter squeezing to expel residual liquid to the extent possible to obtain agarose, and an agarose thereof.

 
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