Agar, scientific name is agar, English name (agar), also known as agar (agar-agar), seaweed, frozen powder, agar gum, stone flower gum, agar extract, agar powder, cold weather , cole shavings, is a kind of vegetable gum, commonly made from seafood such as Eucheuma, Gelidium, Gracilaria, etc. It is a colorless, shapeless solid that dissolves in hot water. It is widely used in the food industry and is often used as a bacterial culture medium. Why is it called agar? It is mainly made from Hainan's Eucheuma or Gelidium. The abbreviation of Hainan is Qiong.

Agar is a polysaccharide extracted from seaweed and is one of the most widely used seaweed gels in the world. It is widely used in many aspects such as food industry, pharmaceutical industry, daily chemical industry, bioengineering, etc. Agar agar can significantly change the quality of food and improve the grade of food. The price is very high. It is characterized by physical and chemical properties such as coagulation and stability, and can form complexes with some substances. It can be used as a thickener, coagulant, suspending agent, emulsifier, preservative and stabilizer. It is widely used in the production of oranges and various beverages, jelly, ice cream, pastries, soft candies, canned food, meat products, eight-treasure porridge, white fungus and bird's nests, soups, cold foods, etc. Agar is used in the chemical industry, medical research, and can be used as culture media, ointment base and other uses.