Hyposulfite

Methyl ethyl (7-methoxy-10-methyl-3-phenthiazinyl)malonate (62.2 grams) followed by methyl iodide (45.7 grams) is added to a solution of sodium (4.45 grams) in anhydrous ethanol (500 cc). The reaction mixture is heated under reflux for 1 hour at 45°C, then for 6 hours at 55°C, and finally concentrated to dryness under reduced pressure (20 mm Hg). The residue is taken up in methylene chloride (300 cc) and water (250 cc), filtered in the presence of a filtration adjuvant, washed with methylene chloride (150 cc) and water (150 cc), and decanted. The aqueous solution is extracted once again with methylene chloride (100 cc), and the combined organic solutions washed with water (100 cc), aqueous 0.1 N sodium hyposulfite solution (200 cc) and finally with water (200 cc). After drying over anhydrous sodium sulfate and evaporation to dryness under reduced pressure (20 mm Hg), there is obtained an oil (64.8 grams) which is dissolved in methylene chloride (100 cc) and... 

Investigations of PAN reduction in DMF solution in the presence of Raney nickel, sodium hyposulfite, acetic acid, pyridine, and water at 40-100 °C have shown52 ... 

In 1888, Turpin prepd a series of cool expls which were permissable, by incorporating materials such as alkali chlorides, Na or K bicarbonate (up to 50% content), fluorides, acetates, oxalates, Ba carbonate. 10H2O, chromates, hyposulfites, stannic acid, boric acid, borates, etc, in the expls listed above eg, a) K chiorate 45, double salt of Ca and K acetochlorate 35, tar 18, charcoal 5, and alkali bicarbonate or oxalate I5ps b) K chlorate 15, double salt of K and Amm chlorobichromate 35 K or Na nitrate 10, tar 18, charcoal 5, and K or Na bicarbonate 15ps... 

At least four companies process spent caustics to market the phenolics and the sodium hyposulfite. However, the market is limited and most of the spent caustics are very dilute, so the cost of shipping the water makes this operation uneconomic. Concentration can be increased by recycling spent caustics at the treater or recycling the spent caustics found in the water bottoms of intermediate product tanks [39]. 

Iodo-7-nitrofluorene gave 2-iodo-7-aminofluorene in 85% yield by reduction with hydrazine in the presence of Raney nickel [277], and 2-iodo-6-nitronaphthalene and 3-iodo-6-nitronaphthalene afforded the corresponding iodoaminonaphthalenes in almost quantitative yields on treatment with aqueous-alcoholic solutions of sodium hydrosulfite (hyposulfite, dithionite) [257]. 

As evaporation proceeded, sodium chloride began to precipitate and later potassium chloride and potassium sulfate. The mother liquor then contained the iodides of sodium and postassium, part of the sodium chloride, sodium sulfate, sodium carbonate, cyanides, polysulfides, and some sulfites and hyposulfites resulting from the reduction of sulfates during calcination. 

Recent work has demonstrated that the sodium nitrite mediated cyclization of a series of hydrazino uracil glycosides gives a range of toxoflavin glycosides together with their 4-oxide analogues, where the latter can be reduced to the former with hyposulfite. The method of cyclization is as discussed in Section 10.20.9.2.3(i) in Equations (22)-(24). 

Synonym Ammonia Water Amfbnioformaldehyde Ammonium Acetate Ammonium Acid Fluoride Ammonium Amidosulfonate Ammonium Amidosulphate Ammonium Benzoate Ammonium Bicarbonate Ammonium Bichromate Ammonium Bifluoride Ammonium Carbonate Ammonium Chloride Ammonium Citrate Ammonium Citrate, Dibasic Ammonium Decaborate Octahydrate Ammonium Dichromate Ammonium Disulfate-Nickelate (II) Ammonium Ferric Citrate Ammonium Ferric Oxalate Trihydrate Ammonium Ferrous Sulfate Ammonium Fluoride Ammonium Fluosilicate Ammonium Formate Ammonium Gluconate Ammonium Hydrogen Carbonate Ammonium Hydrogen Fluoride Ammonium Hydrogen Sulfide Solution Ammonium Hydroxide Ammonium Hypo Ammonium Hyposulfite Ammonium Iodide Ammonium Iron Sulfate Ammonium Lactate Ammonium Lactate Syrup Ammonium Lauryl Sulfate Ammonium Molybdate Ammonium Muriate Ammonium Nickel Sulfate Ammonium Nitrate Ammonium Nitrate-Urea Solution Ammonium Oleate... 

Phthalazinium-1-dates (196) are stable, yellow or colorless crystalline compounds that undergo an interesting variety of reactions. Reduction of aryl derivatives with zinc and dilute hydrochloric acid gives phthalimidines (210) whereas reduction with alkaline sodium hyposulfite gives 3-aryl-3,4-dihydro-l(2A)-phthalazinones (211)." 6.118-120,137 3 Mcthylphthal-... 

SODIUM THIOSULFATE. [CAS 7772-98-7], Na2S203 5H20, formula weight 248.19, white crystalline solid, decomposes above 48°C, sp gr 1.685. Also known as hypo and sometimes misnamed hyposulfite, sodium thiosulfate is very soluble in H2() (301.8 parts in 100 parts H20 at 60°C), soluble in ammonia solutions, and very slightly soluble in alcohol. When sodium thiosulfate is added to an acid, thiosulfuric acid II2S2O3 may... 

Synonyms Antichlor, Hypo, Hyposulfite of soda, Sodium hyposulfite, Sodium subsulfite. Appearance Large, white, transparent crystals and powder. 

Amber varnish Sodium chloride, dichromate, hydroxide, hyposulfite, nitrate... 

The hyposulfite ion, S022-, contains two oxygen atoms. Once you know the meanings of the prefixes and suffixes, you need only memorize the formulas of the ate ions. You can work out the formulas for the related ions using their prefixes and suffixes. The meanings of the prefixes and suffixes are summarized in Table 3.7. In this table, the x stands for the number of oxygen atoms in the ate ion. 

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