Table 2. Viscosity and pH profiles of SFT HEC gel stored at 40°C for 8 weeks.

	Samples
Test	HEC gela	SFT HEC gel (0 week)b	SFT HEC gel (at 40°C for 8 week)b
Apearance	Clear gel	Clear gel	Clear gel
pH	4.41±0.020	4.58±0.025	4.63±0.056
Viscosityc	5,800±21.5	5,830±18.9	5,810±15.5

^a1.5% HEC;

^b0.3 mM SFT in 1.5% HEC;

^cUnit: mPa.s; Samples were tested in triplicate and the data were represented in mean ± SD.