General description:
                            
                                
                            
                            
                            
                                Chemical Formula: H2Al2(SiO3)4-nH2O
The two types of commercial bleaching clays used in processing edible oils may be characterized as: Natural Bleaching Earth and Activated Bleaching Earth. Natural Bleaching Earth is usually a
bentonite clay which exhibits adsorptive properties in its natural state.