β-cyclodextrin
CAS No.:7585-39-9
Oligosaccharide homologue, composed of 7 glucose monomers α- A ring formed by the binding of 1,4 glycosidic bonds.
Alias: cyclomaltheptahose, cycloheptadrin, BCD
Physical and chemical properties
White crystalline powder, odorless, slightly sweet, soluble in water (1.8g/100ml, 20 ℃). With the increase in temperature, the solubility increases. It is difficult to dissolve in methanol, ethanol, and acetone, but slightly soluble in pyridine, dimethylformamide, dimethyl sulfoxide, and ethylene glycol. Melting point 290 ~ 305 ℃, inner diameter (molecular gap) 0.7 ~ 0.8nm, optical rotation 〔 α+ 165.5（°）。
β-cyclodextrin is stable in alkaline aqueous solution and hydrolyzes slowly in the case of acid. Its iodine complex is yellow and its crystal shape is a plate. β- Cyclodextrin has high selectivity, stable chemical properties, easy separation, and no hygroscopicity, but easy to form stable hydrate. The degree of hydration between 50% and 70% relative humidity is equivalent to that per molecule β- CD absorbs 10 ~ 11 water molecules (water content 13.7% ~ 14.8%), and the hygroscopic isothermal curve is two phases.
β-cyclodextrin can form an inclusion complex with a variety of compounds, making it stable, solubilized, slow-release, emulsified, antioxidant, anti decomposition, heat preservation, moisture-proof, and has the function of masking odor. It is a new type of molecular wrapping material. After gelatinization, the starch is prepared by the action of cyclodextrin glyc myltransferase produced by microorganisms, decolorization, crystallization, and separation.
Toxicological basis
① LD50: (rat, mouse, acute oral) is greater than 20g/kg (BW).
② ADI: tentatively 0 ~ 6mg/kg (BW) (FAO/WHO, 1994).
③ Mutagenicity test: Ames test, micronucleus test, and mouse testicular chromosome aberration test showed no mutagenicity.
Application
Thickener
GB 2760-2014 stipulates that the maximum dosage of gum-based candy is 20.0g/kg; The maximum dosage of instant rice noodles, prefabricated meat products, and cooked meat products is 1.0g/kg; Fruit and vegetable juice (pulp) drinks (solid drinks shall be increased by dilution multiple), plant protein drinks (solid drinks shall be increased by dilution multiple), compound protein drinks (solid drinks shall be increased by dilution multiple), other protein drinks (solid drinks shall be increased by dilution multiple), carbonated drinks (solid drinks shall be increased by dilution multiple), tea, coffee The maximum consumption of plant (type) beverage (solid beverage shall be increased by dilution multiple), special purpose beverage (solid beverage shall be increased by dilution multiple), flavor beverage (solid beverage shall be increased by dilution multiple) and expanded food shall be 0.5g/kg.
β-cyclodextrin is used for embedding volatile perfume to make it stable β- The concentration ratio of cyclodextrin was 1 ∶ 1. It is used for embedding natural pigments to make them stable. It is used to remove the peculiar smell of bean products and other products, as well as the bitterness of casein, stevioside, mutton, and fish.
Used for making solid wine and fruit juice powder. Used in canned fruits and vegetables to prevent the juice from producing white turbidity. Reference dosage in food processing: canned orange, the addition amount is 0.2% ~ 0.4% of the syrup amount, without white turbidity; Adding 0.01% ~ 2.0% to canned bamboo shoots can prevent white precipitation; The addition of 0.25% frozen protein powder can improve the foaming power and foam stability.
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