Sodium hydrogen sulfite, solid

SODIUM HYDROGEN SULFIDE see SHROOO SODIUM HYDROGEN SULFITE see SFEOOO SODIUM HYDROGEN SULFITE, solid pop see SFEOOO... 

SODIUM HYDROGEN SULFITE or SODIUM HYDROGEN SULFITE, SOLID or SODIUM HYDROGEN SULFITE SOLUTION (7631-90-5) Slowly oxidized to the sulfate on contact with air. Reactions with oxidizers or acids produce sulfur dioxide gas. Attacks many metals. 

The addition products often are nicely crystalline solids that are insoluble in excess concentrated sodium hydrogen sulfite solution. Whether soluble or insoluble, the addition products are useful for separating carbonyl compounds from substances that do not react with sodium hydrogen sulfite. 

Nitrophenyl Tellurium Bromide1 0.42 g (6 mmol) of solid sodium hydrogen sulfite are added over a period of 20 min to a stirred suspension of 1.0 g (3 mmol) of 2-nitrophcnyl tellurium tribromide in water at 0°. The resultant deep-red slurry is stirred for 20 min at 0°, filtered, the red paste is dissolved in dichloromethane, filtered again, and the dichloromethane solution is diluted with hexane. The product crystallizes as a deep-red solid yield 0.59 g (80%) m.p. 76°. 

SYNS BISULFITE de SODIUM (FRENCH) HYDROGEN SULFITE SODIUM SODIUM ACID SULFITE SODIUM BISULFITE SODIUM BISULFITE (1 1) SODIUM BISULFITE, solid (DOT) SODIUM BISULFITE, solution (DOT) SODIUM HYDROGEN SULFITE SODIUM HYDROGEN SULFITE, soUd (DOT) SODIUM HYDROGEN SULFITE, solution pOT) SODIUM SULFHYDRATE SULFUROUS ACID, MONOSODIUM SALT... 

Sulfur dioxide is conveniently made in the laboratory by adding a strong acid to solid sodium hydrogen sulfite ... 

Methylpyrimidine-2,4.5-triamine (1.00 g, 7.00 mmol) was refluxed with a solution of glyoxal sodium hydrogen sulfite (2.24 g, 14 mmol) in H20 (22 mL) for 80 min. The hot solution was filtered, and the filtrate was cooled to yield a brown solid. This was washed with EtOH, shaken with 1 M NaOH (16 mL) for 30 min, then collected by filtration, washed with H20, and recrystallized (H20) to give 2 as yellow needles yield 0.35 g (23%) mp >290°C (dec.). 

Chloro-1-propanol Propene is led into an ice-cooled, rapidly stirred solution of chromyl chloride (1 mole) in CC14 (300 ml) until the Cr02Cl2 color has disappeared (absorption 23 g). The solid product that separates is hydrolysed by sodium hydrogen sulfite solution. The aqueous solution is saturated with salt and extracted with ether. The ether layer is dried over Na2S04 and distilled. The yield is 43%. 

Finely powdered ( ) iodine (0.22mole) is added, in portions, during 2h, to a rapidly stirred mixture of benzene (0.3 mole), Ag2S04 (0.1 mole), concentrated HC1 (200 ml), and water (200 ml). The whole is stirred for a further hour, then diluted with water (600 ml) and decanted from Agl and residual iodine. The solid product is treated with sodium hydrogen sulfite and extracted with ether. The ether extracts afford, after vacuum-distillation 78% of iodobenzene.375... 

The brown solid is collected on a suction filter and washed successively with 15 ml. of 95% ethanol, two 15-ml. portions of 5% aqueous sodium hydrogen sulfite solution, 20 ml. of water, and two 20-ml. portions of hot 95% ethanol. Although the ethanol washings are green, little product is lost in this step. 

Sodium bisulfite (sodium hydrogen sulfite, NaHSOj [CAS 7631-90-5]) Irritating to eyes, skin, and respiratory tract. Hypersensitivity reactions (angioedema, bronchospasm, or anaphylaxis) may occur. 5 mg/m White crystalline solid with a slight sulfur dioxide odor and disagreeable taste. Widely used as a food and chemical presenrahve. 

Sodium hydrogen sulfite, NaHSOs, does not exist as a solid. Foerster found evidence based on freezing-point lowering that in solution no pyrosulfite ions are present, only hydrogen sulfite ions ... 

CAS 7631-90-5 EINECS/ELINCS 231-548-0 UN 2693 (sol n.) (DOT) UN 2949 INS222 E222 Synonyms Acid sodium sulfite Hydrogen sulfite sodium Sodium acid sulfite Sodium bisulfite (1 1) Sodium bisulfite, solid Sodium bisulfite, solution Sodium hydrogen sulfite Sodium sulfhydrate Sulfurous acid monosodium salt Ciassihcation Inorganic salt Empiricai HO3S Na Formuia NaHSOs... 

A solution of 0.01 mol of aromatic amine in 3 L of 1.7 N sulfuric acid is prepared in a 5-L flask 1 L of 0.2 M potassium permanganate is added, and the solution allowed to stand at room temperature for 8 hours. Excess permanganate is reduced by slow addition of solid sodium hydrogen sulfite until the purple color disappears. The mixture is then flushed down the drain. 

Sulfite. Potassium sulfite, [CAS 10117-38-1], K2SO3 2H2O potassium hydrogen sulfite, KHSO3 white solids, similar in properties and formation to the corresponding sodium sulfites. 

Diphenyl disulfide. In a 100-mL, round-bottomed flask equipped with a magnetic stirrer are placed 11.0 g (10.25 ml, 0.1 mol) of benzenethiol and 50 mL of trifluoroethanol (Note 1). The mixture is stirred and cooled in an ice bath (Note 2) and 12.5 mL (3.73 g, 0.11 mol) of 30% aqueous hydrogen peroxide (Note 3) is added dropwise over a period of 15 min through an addition funnel. After completion of the addition, the ice bath is removed and the reaction mixture is allowed to stir at room temperature for 24 hr. Diphenyl disulfide is sparingly soluble in trifluoroethanol and precipitates out of solution. The solids are collected on a Buchner funnel and dried under vacuum to afford 10.6 g of diphenyl disulfide (97%) (Note 4). Sodium sulfite 2.52 g (0.02 mol) is added to the mother liquor to decompose the excess peroxide and the mixture is heated in a water bath at 50°C for 30 min. A starch iodide test is negative. The liquid is transferred to a 100-mL, round-bottomed flask, fitted with a distillation unit having a Vigreux column (5 cm). The flask is heated in an oil bath and the solvent is distilled to recover the trifluoroethanol (Note 5). 

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