1.Contains Sodium or potassium salts
1.Contains ammonium or sulphonate salts
2.Soap cannot be used in hard water.
2.Synthetic detergents can be used in hard Water.
3.Soap is made from vegetable/edible oils
3.Synthetic detergents are made from by Products of petroleum industry which helps to conserve valuable edible oils.
4.Soaps cannot be used in acidic medium as This would precipitate the fatty acids.
4.Synthetic detergents can be used in any Medium including acidic medium.
5.Soaps have weak cleansing action.
5.Synthetic detergents have strong Cleansing action.