Cyclodextrins are soluble in water and insoluble in most organic solvents (Table 22.2). In the presence of urea, the solubility of β-cyclodextrin increases to 250 g/L. 38. At high pH, ionization of hydroxyl groups increases water solubility; at pH 12.5 the solubility of β-cyclodextrin is 750 g/L.
What is beta-cyclodextrin?
β-Cyclodextrin, a cyclic oligosaccharide consisting of seven glucose units joined as α-(1 → 4) isomers, is nontoxic, edible, nonhygroscopic, chemically stable, and easily separable. It has a cavity at the center of the molecular arrangement and can thus form a stable insoluble inclusion complex with cholesterol.
What is the shape of the beta-cyclodextrin molecule?
cone-shaped
β-Cyclodextrin (β-CD) is a cone-shaped molecule. It is hydrophilic at the outer surface of the cavity for many hydroxyl groups, but hydrophobic in the cavity. So β-CD is soluble in water, and a variety of hydrophobic guest molecules can be encapsulated in its non-polar cavity.
What is the approximate diameter of the cavity in β cyclodextrin?
It is believed that the molecular dimensions of the β-CD cavity (diameter 0.60–0.65 nm and height 0.78 nm) make it the most ideal host among the three native CDs for inclusion complex formation with the most drugs, flavors, cosmetic ingredients, and pesticides [1,27].
How does cyclodextrin increase solubility?
Cyclodextrins and their derivatives, by forming guest- host complexes, encapsulate an insoluble drug and increase its aqueous solubility. The cyclodextrin carries the drug through the aqueous solution and the complex dissociates upon reach- ing the site of action.
What is 2 hydroxypropyl B cyclodextrin?
2-Hydroxypropyl-β-cyclodextrin (HP-β-CD) is a chemically modified cyclic oligosaccharide produced from starch that is commonly used as an excipient. Although HP-β-CD has been suggested as a potential adjuvant for vaccines, its immunological properties and mechanism of action have yet to be characterized.
What is 2-hydroxypropyl-β-Cyclodextrin used for?
2-Hydroxypropyl-β-cyclodextrin (HP-β-CyD) is a cyclic oligosaccharide that is widely used as an enabling excipient in pharmaceutical formulations, but also as a cholesterol modifier.
What is 2 hydroxypropyl B Cyclodextrin?
What is 2-hydroxypropyl-β-cyclodextrin?
Is beta cyclodextrin safe?
Drug delivery Alpha-, beta-, and gamma-cyclodextrin are all generally recognized as safe by the U.S. FDA. They have been applied for delivery of a variety of drugs, including hydrocortisone, prostaglandin, nitroglycerin, itraconazol, chloramphenicol. The cyclodextrin confers solubility and stability to these drugs.
What is the molecular weight of βββ-cyclodextrin?
β-Cyclodextrin. Molecular Formula C 42 H 70 O 35; Average mass 1134.984 Da; Monoisotopic mass 1134.369751 Da; ChemSpider ID 10469496
What is the molecular weight of beta-dextrin?
Synonym (s): Schardinger β-Dextrin, Cyclomaltoheptaose, Cycloheptaamylose, beta-Cyclodextrin, Caraway. Empirical Formula (Hill Notation): C42H70O35. CAS Number: 7585-39-9. Molecular Weight: 1134.98. Beilstein/REAXYS Number:
What is beta cyclodextrin made of?
Beta-cyclodextrin, a cyclic oligosaccharide consisting of seven glucose units joined as α- (1→4) isomers, forms a stable insoluble inclusion complex with cholesterol and is nontoxic, edible, nonhygroscopic, stable chemically and easily separable.
What is cyclodextrin (CDs)?
Cyclodextrins (CDs) are cyclic oligosaccharides, formed by α-1,4-linked glucose units, with a hydrophilic outer surface and a lipophilic central cavity [1,2,3,4]. α-Cyclodextrin (αCD), β-cyclodextrin (βCD), and γ-cyclodextrin (γCD) are natural products that can be found in small amounts in various fermented consumer products, such as beer.
