Sodium Sulfite

Also found in: Dictionary, Wikipedia.

sodium sulfite

[′sōd·ē·əm ′səl‚fīt]
(inorganic chemistry)
Na2SO3 White, water-soluble, crystals with a sulfurous, salty taste; decomposes when heated; used as a chemical intermediate and food preservative, in medicine and paper manufacturing, and for dyes and photographic developing.

Sodium Sulfite


Na2SO3, a salt; colorless crystals. Density, 2.63 g/cm3. Solubility in water, 20.82 percent at 19.9°C and 21.70 percent at 99°C. At ordinary temperatures Na2SO3.7H2O crystallizes from aqueous solutions.

Sodium sulfite is a strong reducing agent and oxidizes readily in aqueous solutions upon exposure to air. Upon heating in aqueous solutions, Na2SO3 adds sulfur, with the formation of sodium thiosulfate. Sodium sulfate is obtained by the reaction of solutions of Na2CO3 and SO2. It is a component of photographic developers.

References in periodicals archive ?
Cysteine, ascorbic acid, sodium sulfite, citric acid, thiourea, sodium azide, ethylenediamine tetraacetic acid disodium (EDTA) and sodium diethyldithiocarbamate (DETC) were used as PO inhibitors.
For oxygen uptake measurements, we added 500 [micro]L sodium sulfite to a chamber equipped with a Clark electrode and a stirrer.
First, read all ingredient labels for any of six sulfites: sulfur dioxide, sodium sulfite, sodium bisulfite, potassium bisulfite, sodium metabisulfite, potassium metabisulfite; sometimes they are listed simply as "sulfiting agent.
The pharmaceutical plants used a chemical feed pump to continuously inject the sodium bisulfite, or sodium sulfite in liquid form, from a tank.
No more Quaker Instant Strawberries and Cream Oatmeal, which has more sugar and creaming agent than fruit (dehydrated apples pumped up with artificial strawberry flavor, sodium sulfite, citric acid, and Red 40, to be precise).
Salt Sea salt Garlic salt Onion salt Seasoned salt Celery salt Baking powder Baking soda Sodium bicarbonate Monosodium glutamate Sodium fluoride Sodium acid pyrophosphate Sodium aluminum phosphate Sodium meta bisulfite Calcium disodium EDTA Disodium guanylate Disodium inosinate Sodium biphenyl-2-yl oxide Sodium formate Sodium acetate Sodium diacetate Sodium ascorbate Sodium erythorbate Sodium tartarates Sodium potassium tartarates Sodium orthophosphates Sodium maleate Sodium alginate Sodium & potassium polyphosphates Sodium carboxymethylcellulose Dioctyl sodium sulphosuccinate Sodium carbonate Sodium aluminum phosphate Sodium aluminum silicate Sodium citrate Sodium sulfite Sodium caseinate Sodium benzoate Sodium sorbate Sodium nitrate Sodium nitrite Sodium bisulfite
We used sodium hydroxide (NaOH) and sodium sulfite ([Na.
Pavlath and his colleagues have found that if they treat powdered feather quills with sodium sulfite, the keratin softens and can be stretched into a translucent film.
Sodium sulfite is used as a preservative in foods and as an antioxidant in alcoholic beverages.
There are six sulfites found in foods; sulfur dioxide, potassium bisulfite, sodium bisulfite, sodium sulfite, potassium metabisulfite, and sodium metabisulfite.
Non-toxic sodium sulfite is added to neutralize chlorine, leaving water pure and odorless.