Sodium bisulfite, solution

Sodium Bisulfite. Sodium bisulfite, NaHSO, exists in solution but is not a stable compound in the soHd state. The anhydrous sodium bisulfite of commerce consists of sodium metabisulfite, Na2S20. Aqueous sodium bisulfite solution, having specific gravity 1.36 and containing the equivalent of 26—27 wt % SO2, is a commercial product. 

Strong reducing agents such as sulfur dioxide, sodium bisulfite, sodium metabisulfite, and ferrous sulfate are used in the iron and steel finishing sites to reduce hexavalent chromium to the triva-lent form, which allows the metal to be removed from solution by chemical precipitation.21 23 Metal-containing wastewaters may also be treated by chemical precipitation or ion-exchange. 

Prepare bisulfite modification solution consisting of 3 M concentration of a diamine (i.e., ethylenediamine), 1M sodium bisulfite, pH 6. The use of the dihydrochloride form of the diamine avoids having to adjust the pH down from the severe alkaline pH of the free-base form. Note The optimum pH for transaminating biotin-hydrazide to cytosine residues using bisulfite is 4.5 (see Section 2.3, this chapter). 

Sodium bisulfite Sodium borate Solution Unknown s s Zinc chloride Unknown s... 

Sodium Hydrosulfide Solution Sodium Bisulfite Sodium Borate Sodium Borohydride Sodium Cacodylate Hexadecyl Sulfite, Sodium Salt Sodium Chlorate Sodium Chromate Sodium Chromate Sodium Cyanide... 

The time required for the process may be shortened somewhat by adding the sodium bisulfite-sodium hydroxide solution to the suspension of the crude nitroso compound, thus avoiding a long filtration. The amount of water employed in the various operations should be reduced to a minimum, and enough additional sodium hydroxide solution should be used to neutralize... 

Wear eye protection, laboratory coat, and rubber gloves. Dissolve the aniline (1 mL) in 50 mL of 3 M sulfuric acid (prepared by slowly adding 8 mL of concentrated sulfuric acid to 21 mL of water). Weigh 10 g of potassium permanganate and stir small portions of the solid into the aniline solution over a period of about 1 hour. Stir the mixture at room temperature for 48 hours, and then neutralize the solution by adding solid sodium carbonate or a 10% solution of sodium hydroxide. Add solid sodium bisulfite until solution is colorless. Decant the clear liquid into the drain and discard any brown solid with regular refuse.11,12... 

Instruct others to maintain a safe distance. Wear breathing apparatus, eye protection, laboratory coat, and nitrile rubber gloves. Cover the spill with a 1 1 1 mixture by weight of sodium carbonate or calcium carbonate, clay cat litter (bentonite), and sand. When the bromine has been absorbed, quickly scoop into a plastic pail and, in the fume hood, very slowly add the mixture to a pail of cold water. Add 10% sodium bisulfite until solution turns colorless. Test the pH and neutralize if necessary with sodium carbonate. Decant the solution to the drain. Treat the solid residue as normal refuse. Wash the spill area thoroughly with soap and water.20... 

J, negative impact of chlorine containing effluents on receiving water ecosystems thus, effective dechlorination using sodium bisulfite (NaHSOs) solutions is increasing the salinity of effluents ... 

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... 

Streptomycin was inactivated by reducing and oxidizing agents. The bacteriostatic-activity of this antibiotic for Escherichia coli was reduced in the presence of cysteine, sodium thioglycolate, stannous chloride, sodium bisulfite, sodium hydrosulfide, sodium formate and sodium thiosulfate. Cysteine was the most active. Denkelwater, Cook and Tishler found that the cysteine inactivation of streptomycin could be reversed by iodine presumably cystine was formed during this process. Rake and Donovick inactivated streptomycin with semi-carbazide hydrochloride in order to test the sterility of concentrated streptomycin solutions. The inactivation of streptomycin by compounds containing sulfhydryl groups has been discussed by Cavallito. ... 

Claisen flask can be used if the heating is carefully controlled to prevent impure bromophenanthrene from splashing over. The oil pmnp should be protected with the usual Dry Ice trap and with a potassium hydroxide tower to absorb hydrogen bromide. Even in runs in which the carbon tetrachloride solution was washed successively with sodium bisulfite, sodium carbonate, and water, much hydrogen bromide was evolved during distillation. 

The sulfur dioxide-rich gas is contacted countercurrently in the absorber by a sodium sulfite solution. As the sodium sulfite absorbs the sulfur dioxide and forms bisulfite, the solution becomes less saturated. This allows highly reliable fouling- or scaling-free operation of the ab-... 

An older, but relevant review of the toxicity of thiol home permanent waves and neutrahzer solutions was published by Norris in 1964 [139].Thio-glycolates are moderately toxic yet comparable to bisulfite. Sodium thio-glycolate has a LD50 of 148mg/kg (i.p. in rats) [140] versus 115mg/kg (i.v. in rats) for sodium bisulfite [141]. 

Plating solution, chrome Potassium acid sulfate Potassum alum Potassum aluminum sulfate Potassium bicarbonate Potassium bichromate Potassium bifluoride Potassium bisulfate Potassium bisulfite Potassium bitartrate Potassium bromide Potassium carbonate Potassium chlorate Potassium chloride Potassium chromates Potassium citrate Potassium cyanate Silicone tetrachloride, dry Silicone tetrachloride, wet Silver bromide Silver chloride Silver cyanide Silver nitrate Silver sulfate Soap solutions Soda ash Sodium acetate Sodium benzoate Sodium bicarbonate Sodium bichromate Sodium bifluoride Sodium bisulfate Sodium bisulfide Sodium bisulfite Sodium borate Sodium bromate Sodium bromide Sodium carbonate... 

Sodium bisulfite. See Sodium metabisulfite Sodium bisulfite (1 1) Sodium bisulfite, solid Sodium bisulfite, solution. See Sodium bisulfite Sodium borate... 

The work-up in this reaction calls for successive washes of an ethereal solution of the product with aqueous sodium bisulfite, sodium bicarbonate, and sodium chloride. What is the purpose of each of these steps ... 

Hgure 7-14. Equilibrium concentration of SOz in gas over sodium sulfite/bisulfite/ sulfate solutions as a function of pH at i atm pressure and 130 Concentrated system FMC laboratory data, dilute system calculated. Dab ofLegatskietal. (197e)... 

For years chemists have been using sodium bisulfite (that is BISULFITE not BISULFATE) to actually crystallize a ketone out of solution in order to separate it. As it so happens, our happy little MD-P2P is a ketone. And when an oil mixture containing it is mixed with a saturated solution of sodium bisulfite (NaHSOs) the MD-P2P crystallizes out as a bisulfite addition product . It can then be easily separated by filtration. Here s how it goes... 

Anyway, one has the P2P/crap oil, right Right. Next one makes a saturated sodium bisulfite solution by dissolving as much sodium bisulfite as will dissolve in a given amount of water (say, lOOOmL). Now one adds the MD-P2P oil into some of the saturated solution and stirs for 30 minutes. The temperature of the reaction will rise and a big old mass of P2P crystals will form. People often say that the crystals look like chicken fat. Those crystals formed because the bisulfite from the sodium bisulfite latched onto the ketone of the P2P to form a precipitate. And since the P2P is probably the only oil component with a ketone, it is gonna be the only thing of any consequence that crystallizes. 

The soiution is aliowed to cool and the crystals of the P2P-bisulfite addition compound are then separated by vacuum filtration, washed with a little clean dH20 then washed with a couple hundred mLs of ether, DCM or benzene. The filter cake of MD-P2P-bisulfate is processed by scraping the crystals into a flask and then 300mL of either 20% sodium carbonate solution or 10% HCi soiution are added (HCI works best). The soiution is stirred for another 30 minutes during which time the MD-P2P-bisulfite complex will be busted up and the P2P will return to its happy oil form. The P2P is then taken up with ether, dried and removed of the solvent to give pure MD-P2P. Whaddya think of that ... 

Strike sees a point to this in Vogel s text Practical Organic Chemistry (3 ed.)[37]. In it, Vogel crystallizes his ketones using a saturated sodium bisulfite solution that a/so contains a little solvent. This is in contrast to the straight up aqueous (only water) solution that Strike described above. Here is A/hat Vogel said on page 342 ... 

Prepare a saturated solutiotr of sodium bisulfite at the laboratory temperature from 40g of finely powdered sodium bisulphite about 70ml. of water are required. Measure the volume of the resulting solution and treat it with 70 per cent, of its volume of rectified spirit (or methylated spirit) [ethanol or methanol or both, dude] add sufficient water (about 45mL.) to just dissolve the precipitate which separates. ... 

So now we have this solvent containing ketone, dried with MgS04... Not being able to vac-distill today, took about 50 mis of solvent/ketone and placed in beaker on stir plate and boiled off the solvent. The resulting oil was a nice reddish-orange color. Had a very unique smell too. Took about 2 grams worth of this ail, added to a test tube containing a saturated solution of sodium bisulfite... In less than 60 seconds the oil precipitated into a whitish yellow mass (very similar to what acetone would do if added to a bisulfite solution). Never had this quick of a crystallization. Not... 

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