Structure of aluminum hydroxide gel II: aging mechanism.
The aging of aluminum hydroxide gel prepared by the reaction of aluminum chloride and ammonium hydroxide was studied by measurement of pH, acid-consuming capacity, hydroxide to aluminum ratio, chloride activity, and X-ray line broadening. The results were consistent with a polymer model involving particle growth by a deprotonation-dehydration mechanism. Anions inhibit this reaction by binding to the positively charged edges of the hydroxyaluminum polymers.
D000536:Aluminum Hydroxide / Q000494:pharmacology; D000863:Antacids / Q000494:pharmacology; D002712:Chlorides; D003460:Crystallization; D004355:Drug Stability; D006863:Hydrogen-Ion Concentration; D010316:Particle Size; D013431:Sulfates; D013997:Time Factors; D014961:X-Ray Diffraction
D000863:Antacids; D002712:Chlorides; D013431:Sulfates; D000536:Aluminum Hydroxide