sesquicarbonate

Sesquicarbonate of soda is made of three parts or atoms of the carbonic acid, and two of the soda.
Vegetable Diet: As Sanctioned by Medical Men, and by Experience in All Ages|William Andrus Alcott
The sesquicarbonate may be artificially prepared by boiling for a short time a solution of the bicarbonate.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure
Probably both the inside—sesquicarbonate—and the outside—bicarbonate—are useful, and the best plan is to make a ten per cent.
The Barnet Book of Photography|Various
The mineral soda is the sesquicarbonate, to be afterwards described.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

The bicarbonate of soda must be pure, and perfectly free from any neutral carbonate or sesquicarbonate of soda.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley

British Dictionary definitions for sesquicarbonate

sesquicarbonate

/ (ˌsɛskwɪˈkɑːbəˌneɪt, -nɪt) /

noun

a mixed salt consisting of a carbonate and a hydrogen carbonate, such as sodium sesquicarbonate, Na 2 CO 3 .NaHCO 3 .2H 2 O

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