Table 1.

Properties of the materials

Properties	Ascorbic acid	Zinc oxide	Lactose 100M	Lactose 200M
Mean particle size (μm)	126	7	118	49
Poured density (g/mL)	0.85	0.58	0.73	0.54
Tapped density (g/mL)	1.08	0.87	0.88	0.80
Hausner ratio	1.27	1.5	1.21	1.47
Carr’s index (%)	21	33	17	33
Flowability (Carr’s index as reference)	Fair	Poor	Fair	Poor
Moisture content (%)	0.45	0.29	0.38	0.26
Morphology	Irregular – nearly monoclinic crystal structure	Crystal structure – hexagonal and cubic	Irregular	Irregular