Agar (a-gar)' or agar agar ' is a gelatinous substance chiefly used as a solid substrate to contain culture medium for microbiological work. Agar- Agar is a combination of polysaccharides made up of neutral molecules (agarose) plus others electrically charged (agaropectine). Chemically, agar is a polymer made up of subunits of the sugar galactose.
The demand for bacteriological agar comes mostly from industrialized countries although demand in developing countries is also on the rise. Developing countries supply about 90% of the seaweed used for agar, only 38% of the agar is produced in the world market. High Commercial value and dried seaweed is exported to Japan, Korea and even Taiwan. Agar-Agar produced locally is in demand in the local market