Table 4. Rheological studies of microspheres.

Formulation	Bulk density	Tapped density	Compressibility index	Hausner’s ratio	Angle of repose
F1	0.17	0.20	13.63	1.15	12.04
F2	0.16	0.19	16	1.15	11.58
F3	0.23	0.29	13.33	1.15	12.46
F4	0.21	0.26	17.54	1.21	11.23
F5	0.24	0.27	11.76	1.13	15.6
F6	0.27	0.31	12.5	1.14	11.91
F7	0.20	0.25	17.94	1.21	12.33

Note: Data indicates the mean ± standard deviations are representative of at least three different experiments.