Manufacturing Process Phase A: Combine all ingredients of phase A and raise the pH to 11 to dissolve cinnamic acid. When everything is dissolved, lower the pH back to 6 again. Phase B: Add all ingredients of phase B to phase A and stir until a slightly viscous gel is formed. Adjust pH to 5.5 +_ 0.05. Specification Appearance: Yellowish, clear, slightly viscous gel pH: 5.5 +_ 0.05 Stability: Microbiohas not