... change is small when pH value is within 2 to 12 but decreasewhen pH value is low than the ... surface-active agent, it possesses the following characteristics inaddition to acts of thicker agent, suspending agent, adhesive agent, emulsificationagent ... gelatin, thicker agent and stabilizingagent as well as additives to make emulsion, frozen gelatin, lotion, eye clear agent,suppository and tablets ...