Baking soda ingredients are four elements with chemical formula NaHCO3.
The first ingredient is sodium. Sodium bicarbonate contains one hydrogen atom and forms a hydroxide (OH) ion, to give the compound the alkaline characteristic. The last is oxygen.
Baking soda ingredients should be pure sodium bicarbonate. It is a fine white powder that should 100% dissolves in the water. If not, there are some other ingredients. Mostly well known brands of baking soda contains no aluminimun - like Arm & Hammer's baking soda is completly aluminum free. They would have to state it on the labbel if there was any aluminium because people take it internally too.
The difference in ingredients between baking soda and baking powder are:
Baking powder is the mixture of baking soda or sodium bicarbonate and weak acid. Typical ingredients by weight are around 30% sodium bicarbonate, 10% monocalcium phosphate, and 25% sodium aluminium sulfate. The last two ingredients are acidic and combine with the sodium carbonate and water to produce the carbon dioxide. Baking powder includes some ingredients for consistency and stability of the mixture like some starch as an drying agent.
Baking soda - (NaHCO3) or sodium bicarbonate or sodium hydrogen carbonate in the acid-base reaction produces ingredients like:
NaHCO3 + H+ › Na+ + CO2 + H2O
There are many uses for baking soda like as an ingredient for baking or in medications.