Agar is a complex water-soluble polysaccharide, which is composed of agarose and agar gel. Agarose is a disaccharide composed of two galactose. Agar gel is similar to agarose in structure, except that it can be sulfated.
Where: D-G is β- D-galactopyranose; Lag is 3, 6-dehydration- α- L-galactopyranose; AB is agarose.
Alias: seaweed, frozen powder
Classification code CNS 20.001; INS 406
The physical and chemical properties are translucent, white to light yellow film bands, fragments, particles or powder, odorless or slightly smelly, and the taste is sticky and slippery; Insoluble in cold water, soluble in boiling water, solidification temperature 32 ~ 42 ℃, melting point 80 ~ 90 ℃. Even if the concentration of agar is as low as 1%, a fairly stable gel (gel) can be formed. Agar has high water absorption and water holding capacity.
When dry agar is soaked in cold water, it absorbs water, swells and softens, and can absorb more than 20 times of water. Agar has strong acid resistance. It is extracted from algae such as clidumamansil Lamour and Gracilaria conferuqides. It is obtained by pretreatment with an alkaline solution, washing with water, boiling with a weak acidic solution (or extracting with autoclave), filtering and slag removal, solidification, dehydration, drying, and crushing; Or freezing the filtered gel, thawing it, and then dehydrate and dry it.
Toxicological basis
① LD50: (mouse, acute oral) 16g/kg (BW); (rat, acute oral) 11g/kg (BW).
② ADI: no regulation is required (fao/who, 1994).
Quality standard
Quality standard GB 1975-2010
Application of thickener
GB 2760-2014 stipulates that it can be used in an appropriate amount in all kinds of food (except food in Appendix 2) according to production needs.
Agar is used for Western dim sum, mutton soup, pie, ice cream, yogurt, cool drinks, dairy products, low-calorie health food, etc. Agar is used in beverage products. Its function is to suspend the solid matter in the beverage evenly, without sinking, with good transparency, good fluidity, and smooth taste.
The transparency and taste of soft candies made of agar, glucose solution, and white granulated sugar are far better than other soft candies. Beer clarifier uses agar as an auxiliary clarifier to accelerate and improve clarification. Agar can absorb water in the intestine, expand the intestinal contents, stimulate the intestinal wall, and help improve constipation.
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