It is used as a preservative in food.
It helps in the curing process by inhibiting the growth of botulism bacteria, and slowing down any rancidness occurring. It also fixes colours in meats.
It comes as a granular off-white powder.
To compare, refer to See Also links below for:
- Sodium Nitrate (NaNO3)
- Sodium Nitrite (NaNO2)
- Potassium Nitrate (NaN04) aka Saltpetre