A naturally occurring mixture of sodium carbonate decahydrate (Na2CO3·10H2O, a kind of soda ash) and about 17% sodium bicarbonate (also called baking soda, NaHCO3) along with small quantities of household salt (sodium chloride) and sodium sulfate. It was historically used in ancient Egypt for mummification and as a cleaning agent. noun
The ancient Egyptians used natron to preserve bodies during the mummification process.
Natron was also employed as a cleaning agent and in the production of early glass.