• Non Ferric Alum is a purer form of aluminum sulphate.
• It is used in better grades of paper for loading and sizing purposes.
• Non Ferric Alum is manufactured from aluminium trihydrate whereas ferric alum uses bauxite as the raw material.
• The raw material is cooked with sulphuric acid under suitable conditions.
• Alum exists in different forms: potash alum, Soda alum, ammonium alum, and chrome alum.
• Alum can also be used as a chemical leavener in the home. It's often used as a reactant in baking powders alongside baking soda.
• Complete answer: Alum powder and baking soda are not the same thing.