Table 2.

Formulation composition of gels manufactured using Method II.

Component	Test product 0.04 %	Test product 0.06 %	Test product 0.08 %	Test product 0.1 %
Tretinoin-loaded-microparticle, 1 %w/w	10 g	–	–	–
Tretinoin-loaded-microparticle, 0.8 % w/w	–	10 g	–	–
Tretinoin-loaded-microparticle, 0.6 % w/w	–	–	10 g	–
Tretinoin-loaded-microparticle, 0.8 % w/w	–	–	–	10 g
Propylene glycol	23.65 g
Carbomer 974P
Glycerin
PPG-20
Cyclomethicone and dimethicone
Sorbic acid
BHT
Benzyle alcohol
EDTA
Trolamine
Purified water	ad. 100 g