Non-toxic to the environment and to humans, sodium bicarbonate fortifies laundry detergent and softens hard water. It's also perfect for cloth diaper care. Size: 850 g. Use: To remove petroleum products, dilute 75 ml of sodium carbonate in 4 L of hot water and let soak for 24 hours. To clean cloth diapers, mix 250 ml of sodium carbonate in 20 L of hot water and a few drops of dishwashing soap. Let diapers soak in mixture for 48 hours.