Natriumhydrogensulfit Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE BIS GELBE FLüSSIGKEIT MIT CHARAKTERISTISCHEM GERUCH.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen und bei Kontakt mit S?uren, unter Bildung von Schwefeloxiden. Reagiert mit S?uren und starken Oxidationsmitteln. Feuer- und Explosionsgefahr. Schwache S?ure. Greift Metalle an.
ARBEITSPLATZGRENZWERTE
TLV: 5 mg/m?(als TWA); Krebskategorie A4 (nicht klassifizierbar als krebserzeugend für den Menschen); (ACGIH 2005).
MAK: Sulfite l?sen pseudoallergische Reaktionen aus; (DFG 2006).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Verschlucken.
INHALATIONSGEFAHREN
Nur ungenügende Angaben vorhanden über die Geschwindigkeit, mit der eine gesundheitssch?dliche Konzentration in der Luft erreicht wird.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Der Stoff kann asthmaartige Reaktionen hervorrufen oder Entzündungsreaktionen der Haut bei sensibilisierten Personen nach Verschlucken.
LECKAGE
Ausgelaufene Flüssigkeit in abgedeckten Plastikbeh?ltern sammeln. Reste mit Sand oder inertem Absorptionsmittel aufnehmen und an einen sicheren Ort bringen.
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
R31:Entwickelt bei Berührung mit S?ure giftige Gase.
R41:Gefahr ernster Augensch?den.
S-S?tze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S39:Schutzbrille/Gesichtsschutz tragen.
S46:Bei Verschlucken sofort ?rztlichen Rat einholen und Verpackung oder Etikett vorzeigen.
S25:Berührung mit den Augen vermeiden.
Chemische Eigenschaften
Sodium bisulfite is a white crystalline solid. Slight odor of sulfur dioxide and a disagreeable taste. Slowly oxidized to the sulfate on exposure to air
Verwenden
sodium bisulfite is a preservative and anti-oxidant, it is most frequently used as a pH adjuster.
Allgemeine Beschreibung
Also known as sodium acid sulfite or sodium hydrogen sulfite, NaHS03 is white crystals or crystalline powder that has a slight sulfurous odor and taste.Specific gravity 1.48. Strong irritant to skin and tissue. It is soluble in water,insoluble in alcohol,unstable in air,and non-combustible. Derived by saturating sodium carbonate solution with sulfur dioxide and the solution crystallized. Used as a chemical(sodium salts, cream of tartar), in vat dye preparation, textiles (antichlor, mordant, discharge), food preservative, bleaching groundwood, wool,etc., reducing agent, fermentation, antiseptic, cask sterilization (brewing), copper and brass plating,color preservative for pale crepe rubber, wood pulp digestion, analytical reagent,and as a dietary supplement.
Air & Water Reaktionen
Water soluble.
Reaktivit?t anzeigen
Sodium bisulfite is a reducing agent. Emits highly toxic gaseous sulfur dioxide gas when heated to decomposition or on contact with mineral acids [Sax, 9th ed., 1996, p. 2949].
Hazard
Not permitted in meats and other sources
of vitamin B
1
, strong irritant to skin and tissue.
Health Hazard
Powder is irritating to eyes, nose, and throat and can irritate skin. Ingestion may cause irritation of stomach. Very large doses cause violent colic, diarrhea, depression, and death.
Brandgefahr
Flammable/combustible material. May ignite on contact with moist air or moisture. May burn rapidly with flare-burning effect. Some react vigorously or explosively on contact with water. Some may decompose explosively when heated or involved in a fire. May re-ignite after fire is extinguished. Runoff may create fire or explosion hazard. Containers may explode when heated.
Kontakt-Allergie
Sodium bisulfite is mainly used as an antioxidant in pharmaceutical products, as a disinfectant or bleach, and in the dye industry. The bisulfite of commerce consists chiefly of metabisulfite and possesses the same properties as the true bisulfite. So, the allergen to be tested in products containing disulfite is the corresponding metabisulfite.
Sicherheitsprofil
Poison by intravenous and intraperitoneal routes. Moderately toxic by ingestion. A corrosive irritant to skin, eyes, and mucous membranes. Mutation data reported. An allergen. When heated to decomposition it emits toxic fumes of SO, and Na2O. See also SULFUROUS ACID and SULFITES
m?gliche Exposition
Sodium bisulfite is used in the digestion of wood pulp, in the tanning of leather; in the dyeing of textiles; as a photographic reducing agent; as a food preservative; as an additive in electroplating; as disinfectant, bleach, antioxidant, and as inhibitor of yeast and bacteria in winemaking.
Versand/Shipping
UN2693 Bisulfites, inorganic, aqueous solutions, n.o.s., Hazard class: 8; Labels: 8-Corrosive material. UN3260 Bisulfites, inorganic, solid, n.o.s., Hazard class: 8; Labels: 8-Corrosive material.
l?uterung methode
Crystallise it from hot H2O (1mL/g). Dry it at 100o under vacuum for 4hours.
Inkompatibilit?ten
Aqueous solution is a weak acid. Incompatible with strong mineral acids forming a toxic sulfur dioxide gas. A strong reducing agent, sodium bisulfite is incompatible with oxidizers, such as perchlorates, peroxides, permanganates, chlorates, and nitrates. Reacts with bases forming sulfate. Slowly oxidizes to sulfate in air. Heat causes decomposition. Slowly oxidized to the sulfate on exposure to air. Contact with oxidizers or acids forms sulfur dioxide gas. Attacks some metals in the presence of moisture.
Waste disposal
Dump into water, add soda ash, then neutralize with HCl; flush to sewer with large volumes of water.
Natriumhydrogensulfit Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
PHENYLHYDRAZINE DISODIUM SULFONATE
DL-2-Hydroxy-2-phenylessigsure
DL-Phenylpropanolamin-hydrochlorid
Chinoxalin
Iodophor
2,6-Dibromphenol
N,N-Diethylaminoacetonitril
N,N'-Diphenylbenzidin
4-Acetylbenzoesaeure
Kanamycinsulfat
3-Bromoindazole
1-Hydroxy-3-phenyl-1,3-propanedisulfonic acid disodium salt
2,4-Dinitrobenzolsulfonsure
Benz[cd]indol-2(1H)-on
m-Aminobenzaldehyd
Fuberidazol (ISO)
2,3-DIHYDROBENZOFURAN-5-BORONIC ACID
N-2-Aminoethyl-1-naphthylamindihydrochlorid
4-Iodanilin
Chinolin-5-ol
2-Methoxyphenylaceton
1-CYANOCYCLOPENTENE
4'-Methoxy-2'-nitroacetanilid
4'-Amino-2',5'-diethoxybenzanilid
Reactive Blue 104
6-Isopropyl-3-methylcyclohex-2-enon
3-Methylcrotonsure
2,5-Dichlor-4-(3-methyl-5-oxo-2-pyrazolin-1-yl)benzolsulfonsure
3,3'-Dihydroxybenzidine
2-[(p-Aminophenyl)sulfonyl]ethylhydrogensulfat
6-BROMO-3-HYDROXYQUINOLINE
Natriumhydroxymethansulfonat
Natrium-[(2,3-dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)methylamino]methansulfonat
4-Chlormandelsaeure
Cyclopentyl Acetaldehyde
6-Iodoquinazolin-4-one
2-Methylchinoxalin
5-Chlor-2-nitroanisol
2-Brom-4-nitroanilin
Methylheptenon