hydrosulfite

[ hahy-druh-suhl-fahyt ]

/ ˌhaɪ drəˈsʌl faɪt /

Origin of hydrosulfite

First recorded in 1860–65; hydrosulf(urous) + -ite¹

The constituents of the hydrosulphite vat are hydrosulphite of soda, lime and indigo.

Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 |Various
The hydrosulphite of soda referred to above is made in the following way: 4-1/2lb.

The Dyeing of Woollen Fabrics |Franklin Beech
It may be restored to its former conditions by adding some hydrosulphite of soda.

The Dyeing of Woollen Fabrics |Franklin Beech
It has many advantages over the hydrosulphite vat, as it is not nearly so much affected by changes of temperature and weather.

Vegetable Dyes |Ethel M. Mairet

If added too quickly the hydrosulphite will cake, fall to the bottom and be difficult to dissolve.

Vegetable Dyes |Ethel M. Mairet

hydrosulphite

/ (ˌhaɪdrəʊˈsʌlfaɪt) /

another name (not in technical usage) for dithionite

C20: from hydrosulph ( urous) + -ite ²