Table 2.

Physicochemical properties of HSA-STF.

Tests	HSA-STF
Color	Helveolous
Protein qualitative test	Negative
Sterile test	Negative
Safety test	Negative*
Pyrogen test	Negative*
pH	7.0 ± 0.4
E 260/E 280	1.96 ± 0.23
Maximum absorbance	258 ± 6
Concentration of polypeptide (mg/mL)	2.34 ± 0.31
Concentration of ribose (mg/mL)	0.717 ± 0.043

 *It qualifies as per Chinese Pharmacopoeia.