Validation of a UV Spectrometric Method for the Assay of Tolfenamic Acid in Organic Solvents

Table 1

List of solvents used for the validation of TA assay in the order of decreasing polarity.

S. number	Name	Purity (%)	Supplier	Dielectric constant
()	Acetonitrile	99.9%	VWR	36.64
()	Methanol	99.8%	Merck	33.00
()	Ethanol	99.8%	BDH	25.30
()	Acetone	99.0%	Merck	21.01
()	1-Propanol	99.5%	Merck	20.80
()	1-Butanol	>99.0%	Merck	17.84
()	1-Hexanol	98.0%	Scharlau	13.03
()	Benzyl alcohol	>99.0%	Scharlau	11.92
()	1-Octanol	99.5%	Merck	10.30
()	Dichloromethane	99.8%	Lab-Scan	8.93
()	Ethyl acetate	99.0%	Merck	6.08
()	Chloroform	99.5%	Merck	4.81
()	Toluene	99.5%	Tedia	2.38

[33].