washing soda 
noun [mass noun]
Sodium carbonate, used dissolved in water for washing and cleaning.To get grease out of clothes, Andrew suggested dissolving washing soda in hot water and soaking the garment for half an hour....
- Dissolve one cup of washing soda in a litre of hot water and add the soap solution, mixing well.
- If approved disinfectants are unavailable washing soda, mixed with water at a rate of 50 grams per litre, is the next best alternative.
- carbon credit
- carbon cycle
- Carbondale
- carbon-date
- carbon dating
- carbon debt
- carbon dioxide
- carbon dioxide snow
- carbon disulfide
- carbon disulphide
- carbon emission
- carbon fibre
- carbon fixation
- carbon footprint
- carbon-free
- carbonic
- carbonic acid
- carbonic acid gas
- carbonic acid snow
- carbonic anhydrase
- carbonic oxide
- carbonic snow
- Carboniferous
- Carboniferous limestone
- carbonification