Studies on solute–solute and solute–solvent interactions of quercetin and 7-hydroxy flavone with nicotinamide in hydro-ethanolic mixed solvents: bioflavonoid-HBD interactions by volumetric and acoustic analysis

Table 1 Specifications of the used chemicals

Name^a and CAS No. of chemicals^b	Molecular formula and molar mass ^c	Manufacturers	Mass fraction purity^d	Purification method^e
Quercetin^a (117-39-5)^b	\({\text{C}}_{15}{\text{H}}_{10}{\text{O}}_{7}\) (0.3022)	Sigma Chemical Co. (Bangalore, India)	›99	Drying over anhydrous \({\text{CaCl}}_{2}\)
7-Hydroxy flavone^a (6665-86-7)^b	\({\text{C}}_{15}{\text{H}}_{10}{\text{O}}_{3}\) (0.2382)	Sigma Chemical Co. (Bangalore, India)	›99	Drying over anhydrous \({\text{CaCl}}_{2}\)
Nicotinamide^a (98-92-0)^b	\({\text{C}}_{6}{\text{H}}_{6}{\text{N}}_{2}\text{O }\) (0.1221)	Sigma Chemical Co. (Bangalore, India)	›99	Drying over anhydrous \({\text{CaCl}}_{2}\)
Water^a (7732-18-5)^b	\({H}_{2}O \)(0.018)	Loba Chemie Pvt Ltd, Mumbai, India	›99	None
Ethanol^a (64-17-5)^b	\({{C}_{2}H}_{5}OH\) (0.046)	Sigma Chemical Co. (Bangalore, India)	›99	Drying in molecular sieve (3A) for 24 h

^aAll reagents were of A. R grade
^bChemical Abstract Service registry number
^cMolar mass of chemical, (\({\text{kg mol}}^{-1})\)
^dPercentage purity (as manufacturer declared)
^eAll reagents were dried over \({\text{CaCl}}_{2}\) until a constant mass was reached

ISSN: 2661-801X