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Topic: Sodium sulfite

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	Sodium Sulfite and Sodium Sulfate
		Sodium Sulfate and Sodium Sulfite are coproducts of resorcinol by sulfonation-fusion reaction.
		Sodium Sulfite, Commercial, Anhydrous is an economical chemical for the sulfite pulping of wood in manufacturing various grades of paper.
		Sodium Sulfite is oxidized to sodium sulfate and is used to remove oxygen from boiler feed water.
	www.indspec-chem.com /PRODUCTS/SodiumSulfite/SodiumSulfite.asp (238 words)

	041. Sodium sulfite (FAO Nutrition Meetings Report Series 40abc) (Site not responding. Last check: 2007-10-20)
		Description Sodium hydrogen sulfite is a white crystalline or granular solid with an odour of sulfur dioxide.
		Small amounts of sulfite are regularly formed in the intermediary metabolism of the body in the catabolism of cystine by the non-enzymatic decomposition of 8-sulfinyl pyruvic acid to pyruvic acid and SO The stationary concentration of sulfite in the cells is too small to be measured.
		Effect on thiamine Treatment of foods with sulfites reduced their thiamine content (Morgan et al., 1935; Williams et al,, 1935), It has been suggested that the ingestion of SO in a beverage may effectively reduce the level of thiamine in the rest of the diet (Hötzel, 1962).
	www.inchem.org /documents/jecfa/jecmono/40abcj16.htm (1955 words)

	The Analyst - Internet Health Report: Condition: Sulfite Sensitivity
		Sulfites are sulfur-based preservatives that are used to prevent or reduce discoloration of light-colored fruits and vegetables, prevent fl spots on shrimp and lobster, inhibit the growth of microorganisms in fermented foods such as wine, condition dough, and maintain the stability and potency of certain medications.
		Sulfites can be measured in the urine, and used as a means of monitoring symptom correlation with treatments such as molybdenum.
		Sulfites are sulfur-based compounds that are added by food manufacturers and restaurants for many purposes such as reducing discoloration of light-colored fruits and vegetables; preventing fl spots on seafood; inhibiting the growth of microorganisms in fermented foods such as wine; conditioning dough; maintaining the stability and potency of certain medications.
	www.digitalnaturopath.com /cond/C488289.html (1520 words)

	Sodium sulfite - Wikipedia, the free encyclopedia
		In chemistry, sodium sulfite is a soluble compound of sodium.
		It is also used as a preservative to prevent dried fruit from discoloring, and for preserving meats, and is used in the same way as sodium thiosulfate to convert elemental halides to their respective acids, in photography and for reducing chlorine levels in pools.
		This page was last modified 14:20, 14 April 2006.
	en.wikipedia.org /wiki/Sodium_sulfite (99 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Sodium sulfite is a moderately strong reducing agent yielding sodium sulfate upon oxidation.
		Sodium sulfite is soluble in alcohol, acetone, liquid chlorine and ammonia.
		Sodium sulfite is stable in dry air, even at 100 °C, but in moist air it is rapidly oxidized.
	www.genchemcorp.com /products/sodiumsulfite.shtml (304 words)

	PASCO Chemistry Experiment - Jan. 2002 (Site not responding. Last check: 2007-10-20)
		Sodium sulfite is commonly used industrially, for example in processes such as paper making, dyeing, bleaching, photographic development, and engraving.
		Sulfites and other chemical pollutants, including sulfates, nitrates, ammonia, and heavy metals, produce direct chemical demands on oxygen in the water due to the oxidation-reduction reactions that result.
		However, when sodium sulfite is the scavenger of choice, the sodium sulfate produced forms a soft sludge that can foul heat transfer surfaces or otherwise damage equipment.
	www.pasco.com /experiments/chemistry/january_2002/home.html (912 words)

	Large format photography Forum: 6% sodium sulfite ???
		More sodium sulfite adds some solvent effect but Rodinal-developed negs will still be grainier and have higher acutance (but less fine detail) than negs developed in a "standard" developer such as D-76 1:1.
		Sodium Sulphite dissolves very easily in warm water, and you'll have no trouble mixing it. Just to be perfectly clear: The 6% solution of Sulphite is with respect to working strength Rodinal, after it's been diluted 1:25 or 1:50, not 6% Sulphite added to the concentrate.
		Adding the sulfite is generally more to gain some speed (the sulfite has some solvent action which makes it easier for the developer to access some of the latent image speecks).
	www.photo.net /bboard/q-and-a-fetch-msg?msg_id=003CSC (838 words)

	Solvay Chemicals - Products: Sodium Sulfite (Site not responding. Last check: 2007-10-20)
		The Green River, Wyoming plant is one of just a few sodium sulfite facilities operating in the U.S. The plant began production in early 1991 and has a capacity of 55,000 tons per year.
		Sodium sulfite is primarily used as a pulping agent and de-chlorination agent by the paper industry.
		Sodium sulfite also serves to remove chlorine after bleaching of wood pulp.
	www.solvaychemicals.us /SodiumSulfite.htm (177 words)

	Roth Pump - Sodium Sulfite Vs. Deaerator
		Oxygen scavengers used are Hydrazine and sodium sulfite.
		Sodium Sulfite is less expensive and more readily available.
		Theoretically, 7.88 ppm of sodium sulfite is required to remove 1 ppm of dissolved oxygen.
	www.rothpump.com /CHEMCALC2.htm (215 words)

	AAAAI - Members Center: Allied Health: Sulfite sensitivity
		Sulfite is a well-known air pollutant that is toxic to humans.
		Sodium metabisulfite is more potent than sodium bisulfite in its ability to release sulfur dioxide gas.
		Even in patients who are sensitive to inhaled sulfites, the ingestion of foods containing sulfite may not cause a reaction, since the reaction depends on a number of factors.
	www.aaaai.org /members/allied_health/articlesofinterest/sulfite.stm (920 words)

	Sulfur Dioxide and Some Sulfites, Bisulfites and Metabisulfites (Site not responding. Last check: 2007-10-20)
		Sodium sulfite is used mainly in the pulp industry.
		Both sodium and potassium metabisulfure are used in food processing, chemical industries, water treatment, photoprocessing and the textile industry.
		Potassium metabisulfite was tested for carcinogenicity in one study in mice by oral administration in the drinking-water and sodium metabisulfite in one study in rats by oral administration in the diet.
	www-cie.iarc.fr /htdocs/monographs/vol54/02-sulfur-dioxide.htm (855 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		Typically the species oxidised is manganese and preferably oxidation is effected by the addition of sodium sulfite and oxygen (air) in the presence of an iron compound (eg.
		Sodium sulfite solution was added at a dose rate of 8 mg S/L/min and air was sparged at a rate of
		This method of sulfite dosing was observed to be more efficient than a procedure whereby the sodium sulfite was added in a single dose.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=00/07942.000217&ELEMENT_SET=DECL (2349 words)

	Reference Library/Applications:Hazardous Waste - Soil Treatment / In-situ Chemical Oxidation
		Sodium thiosulfate, the hypo commonly used in photographic processing, can be oxidized by hydrogen peroxide in alkaline solution to produce sodium sulfate.
		Sodium sulfite is oxidized by hydrogen peroxide to produce sodium sulfate, a nontoxic inert salt.
		The rate of reaction between sodium sulfite and hydrogen peroxide is pH dependent.
	www.h2o2.com /applications/industrialwastewater/photowaste.html (498 words)

	New Page
		For many years sodium sulfite was classified by the FDA as a Generally Recognized As Safe (GRAS) compound.
		Recently, the FDA ruled that sodium sulfite (along with 4 other compounds) is a new animal drug of low regulatory priority.
		Sodium sulfite can be used as a 15 percent solution for five to eight minutes to treat eggs of catfish, largemouth bass, and smallmouth bass to improve their hatchability.
	www.uaex.edu /aquaculture2/FSA/FSA9071.htm (750 words)

	Sulfite Strategy
		Foods that sometimes contain sulfites in lesser amounts are mashed potatoes made from dry powder, pickles in a jar, shrimp, cookies, crackers, beet sugar, and pie dough.
		If one's sulfite level is greater than 10 ppm, they probably have a sulfite problem, in which case, it is recommended that they discuss this with a Doc that is familiar with Sulfites.
		Another approach is an Rx sulfite sensitivity test where one ingests 5mg, 25mg, 50mg, and then 100mg of sulfite in pill from; and waits to see if they can tolerate the dose, before going to the next dose, since a large dose can be harmful to one that is sensitive to sulfites.
	www.beatcfsandfms.org /html/Sulfides.html (933 words)

	Sodium Sulfite (Site not responding. Last check: 2007-10-20)
		Sodium Sulfite is a preservative as we indicated on the developer breakdown page.
		The explanation is that the sodium sulfite component is stronger in the stock therefor a physical reduction of the grain is greater.
		There is less sodium sulfite in diluted D-76 there for the physical reduction is less hence it is an over all sharper image.
	www.fotoinfo.com /technicalinfo/sodsul.html (124 words)

	[No title] (Site not responding. Last check: 2007-10-20)
		The sulfite functions as a preservative and scavenger of excess oxidized developer in developer solutions that otherwise would undergo a number of self-condensation reactions resulting in stain.
		When the color developer was dry, sodium metabisulfite was added to the drier in an amount which gave a concentration of 0.25 weight percent, based on the total weight of the CD-4 and sodium metabisulfite.
		metal metabisulfite, bisulfite or sulfite is sodium metabisulfite, bisulfite or sulfite which is present in a concentration of 0.1 to 0.25 weight percent based on the weight of the composition.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=00/77574.001221&ELEMENT_SET=DECL (1373 words)

	\| PUMPROOM TECH: Dechlorination - with Sulfur \| (Site not responding. Last check: 2007-10-20)
		Sodium sulfite is a salt of sulfurous acid (H
		Sodium metabisulfite is the salt of another hypothetical acid, meaning that the actual acid does not exist, but its salts do.
		On a weight basis, you need less sodium sulfite than sodium thiosulfate, but if the sulfite costs twice as much per ounce or pound, the thiosulfate is less expensive for the application.
	www.ppoa.org /pr_tech_dechlorination.htm (762 words)

	Rodinal - Oldest Commercial Developer
		In high concentrations, sodium sulfite (the most-used preservative in photographic formulas) is said to literally eat away the sharp edges of silver grains in the developing emulsion.
		I have varied the sulfite concentration while keeping everything else the same, and I have kept the sulfite constant while changing the dilution of the rest.
		It requires minimum sulfite, which is why all those developers are kept in two parts.
	unblinkingeye.com /Articles/Rodinal/rodinal.html (1867 words)

	AOAC International \| Publications \| Journal of AOAC INTERNATIONAL (JAOAC) (Site not responding. Last check: 2007-10-20)
		Use of sodium sulfite to reduce nitrogenous contamination in fiber analysis was evaluated.
		The effects of sodium sulfite on analytical accuracy and precision were examined for amylase-treated neutral detergent fiber (aNDF), sequentially determined acid detergent fiber (sADF), and acid detergent lignin (sADL) in animal feeds.
		Sodium sulfite reduced fiber and lignin values and decreased nitrogen concentration in residues.
	www.aoac.org /pubs/JOURNAL/1996/ab7901.htm (3305 words)

	Lloyd Erlick / Technical / Bulk Chemicals for the Darkroom
		Sulfite is often available in one or two pound containers, usually priced around seven to ten Canadian dollars per pound.
		Sodium sulfite is used in the food industry, so check these sources for this chemical too.
		A convenient way to work with commonly used chemicals like sodium sulfite is to carefully measure the weight of an easily handled volume, such as a tablespoon.
	www.heylloyd.com /technicl/bulkchem.htm (1895 words)

	Print Developer 130 Adams Version
		The Hydroquinone and the bromide is omitted, and the sulfite reduced to 35 grams per liter.
		Place the warm water in the storage container and add a pinch of sodium sulfite.
		Add the sodium sulfite, stirring until the solid dissolves, Add each chemical in the order given in the table above.
	www.jackspcs.com /pd130a.htm (558 words)

	Effects of incubation time and sodium sulfite upon in-vitro digestibility estimates and sample filtering time by Jay ... (Site not responding. Last check: 2007-10-20)
		The use of sodium sulfite increased (P<0.05) digestibility estimates (1.3 units) across all hays and decreased filtering times by as much as 9.5 min/sample.
		Use of sodium sulfite in the rinse water did not affect apparent NDF recovery and decreased filtering time by approximately 10 min.
		Addition of sodium sulfite to the rinse water provides a viable means to decrease sample analysis time without jeopardizing the accuracy of digestible NDF estimates.
	uvalde.tamu.edu /jrm/sep95/hunt.htm (264 words)

	OhioLINK ETD: Stein, Antoinette
		The chemical reaction pathway for the viable flue gas desulfurization process, dry sodium bicarbonate injection, was investigated to mitigate undesirable plume discoloration.
		As the second step, it was hypothesized that sodium nitrate formed by sodium sulfite reaction with flue gas NO. And as the third step, it was hypothesized that NO
		The patented process incorporated a process step of sodium sulfite injection to remove flue gas NO prior to sodium bicarbonate injection.
	www.ohiolink.edu /etd/view.cgi?ucin997940666 (374 words)

	Prausnitz Group Abstracts (Site not responding. Last check: 2007-10-20)
		Sodium carbonate is a superior scrubbing agent for removing SO from combustion gases, but the resulting sodium sulfate (or sulfite) must be recovered for environmental reasons.
		Liquid/liquid equilibrium data were determined for two-phase mixtures containing aqueous solutions of sodium carbonate, sulfate, or sulfite and a polar organic solvent: acetone, 2-propanol, and 2-methylpropan-2-ol (i.e., tert-butyl alcohol).
		The data show that any one of these solvents can be used to extract water from a concentrated solutions of either sodium sulfite or sodium sulfate in a countercurrent extractor at 35C, causing the anhydrous salt to crystallize.
	www.cchem.berkeley.edu /~jmpgrp/abstracts/jmp542.html (290 words)

	SPI-Chem Sodium Sulfite Anhydrous - Instructions for Use Clearing Polaroid Type 55 P/N Negatives (Site not responding. Last check: 2007-10-20)
		After developing the exposed film for the recommended period of time, the positive, negative, and backing papers are separated, and the negative should be immediately immersed in the prescribed 18% sodium sulfite in water.
		Gentle and steady agitation is important, as the negative "clears", that is, the brown developing "jelly", dissolves away from the substrate plastic.
		Negative scratch resistance can be improved by treating the processed negative(after clearing in water and sodium sulfite anhydrous) in a solution of Kodak Rapid Fix with Hardener (parts A&B) for two minutes.
	www.2spi.com /catalog/photo/sodium-sulfite-instructions.html (289 words)

	Enhanced Generation of Hydroxyl Radical and Sulfur Trioxide Anion Radical from Oxidation of Sodium Sulfite, Nickel(II) ...
		In view of the present results, the exceptionally high carcinogenic potential of Ni appears to be due to the ability of both the nickel and sulfide constituents of the molecule to facilitate the generation of genotoxic radicals.
		OH radical was indeed being produced in the mixture of sodium sulfite, Ni(II), and GlyGlyHis.
		Deamination of 5-methyl-2'-deoxycytidine with carcinogenic nickle subsulfide and its metabolite, nickel(II) sulfite.
	www.ehponline.org /members/1994/Suppl-3/91-96shi/shi-full.html (4045 words)

	Tom Westbrook - Photo Notebook
		This is a Flickr badge showing public photos from tomwestbrook tagged with myfave.
		of Sodium Sulfite in 2 liters of water.
		That's just to make it easy for most people to remember, but that's more like a 22% solution and is a waste of good Na If you notice that 180 divided into 1000 is 18% of the total volume, it's pretty easy to remember this way.
	www.tomwestbrook.com /Photography/notebook.html (798 words)

	Sodium Sulfite and N-Acetylcysteine: New Additives to Dialysate for Inhibiting Formation of Glucose Degradation ...
		By fluorescence intensity under sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE), we determined that the recovered albumin was insignificantly cross-linked.
		In addition to previously reported AGE inhibitors [glutathione, N-acetylcysteine, N-phenacylthiazolium bromide, N-(2-thiazolyl)sulfanilamide], six new chemicals (sodium sulfite, sodium bisulfite, 2-mercaptoethanol, dithiothreitol, S-acetylmercapto succinic anhydride, and acetylsalicylic acid) significantly suppressed fluorescence intensity.
		The mercapto compounds and sodium sulfite may work in a manner different from that of thiazolium derivatives and aminoguanidine.
	www.advancesinpd.com /adv01/14Sakai.htm (1491 words)

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