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Alginates demand has increased considerably worldwide due to its various industrial applications, mainly associated with their rheological properties. This study aimed to analyze the yield and quality parameters (viscosity and gel strength) of the alginate obtained from Halidrys dioica seaweed, in order to determine the feasibility of using this species as an alternative resource for the production of this important phycocolloid. Alginate extraction was performed by ion exchange reactions, beginning with an acidic pre-extraction (HCl 1N), followed by alkaline extraction (Na2CO3 10%) and subsequently filtered. The clarified solution was precipitated in alcohol (96%) to being obtained alginate fibers, which are being dried to finally determine yield. Determining the quality of the alginate was performed using a Brookfield viscometer (Model LTV) and gel strength was measured with a texture analyzer (Model TA.TXPlus). Based on our results, the brown alga H. dioica has great potential to be considered as an alternative resource for extraction of alginates. It had a yield of 20% (comparable with the genera Macrocystis and Eisenia). Their quality parameters were acceptable, the viscosity of 80 mPa. s thus may have application as a thickener in food industries, while its gel strength which is 939g cm-2 has potential for biotechnological application type, pharmaceutical and food industries

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