sodium hydrosulfite
noun
,
Chemistry
1.
a white, crystalline, water-soluble powder, Na
2
S
2
O
4
, used as a reducing agent, especially in dyeing, and as a bleach.
Also called
hydrosulfite
,
sodium dithionite
[dahy-
thahy
-
uh
-nahyt]
/daɪˈθaɪ əˌnaɪt/
(
Show IPA
),
sodium hyposulfite
.