SODIUM BISULFITE 35%

Synonyms:
Sodium hydrogensulfite, Sodium hydrogen sulfite; Sulfurousacid, monosodium salt (8CI, 9CI); Sodium bisulphite; Sulfurous acid, sodium salt; SODIUM BISULFITE 35%; SODIUM BISULFITE 38-40 % AQUEOUS SOLUTION; Sodium acid sulfite; Sodium sulhydrate; Sodium hydrogensulfite aqueous solution; Sodium metabisulfite aqueous solution; Monosodium sulfite; Leucogen; Hydrogen sulfite sodium; Sulfurous acid, monosodium salt; SODIUM BISULFITE; 7631-90-5; Sodium hydrogen sulfite; sodium hydrogensulfite; Sodium bisulphite; Sodium sulhydrate; Monosodium sulfite; Sulfurous acid, monosodium salt; Uantax SBS; Caswell No. 750; Hydrogen sodium sulfite; Hydrogen sulfite sodium; Sodium hydrosulfite(DOT); Sodium bisulfite (1:1); Sodium sulfite (NaHSO3); Sodium bisulfite (NaHSO3); UNII-TZX5469Z6I; Bisulfite de sodium [French]; Fr-62; CCRIS 3950; HSDB 724; NaHSO3; EINECS 231-548-0; NSC 60680; Liquid of Sodium bisulfite; EPA Pesticide Chemical Code 078201; Sodium hydrogensulphite (aqueous solution); Sodium hydrogen sulfite, solution; Sulfurous acid, sodium salt (1:1); Sodium hydrogen sulfite solution (45% or less); Sodium bisulfite, ACS reagent, powder; sodium hydrogensulphite; sodium hydrogen sulphite; Sodium bisulfite [JAN]; Sodium bisulfite [JAN:NF]; sodiumbisulfit; sodium bi sulphite;  sodiumhydrogensulfit; saures Natriumsulfit; Natriumhydrogensulfit; sodiumhydrogensulphite; sodium hydogen sulfite; primaeres Natriumsulfit; sodium hydrogen-sulfite; E222; Sodium bisulfite (TN); Sodium bisulfite (JP17); sodyum bisülfit; sodium bisülfit; sodyum bisulfit;  sodyum bi sulfit;  sodium bisulfit;  sodyum bisülfit35; sodium bisülfit35; sodyum bisulfit35;  sodyum bi sulfit35;  sodium bisulfit35;  sodyum bisülfit 35; sodium bisülfit 35; sodyum bisulfit 35%;  sodyum bi sulfit 35 ;  sodium bisulfit 35 

SODIUM BISULFITE 35%

Sodium bisulfite

Sodium bisulfite
Sodium bisulfite.png
Ball-and-stick model of a bisulfite anion (left) and a sodium cation (right)
Names
IUPAC name
Sodium hydrogen sulfite
Other names
E222, sodium bisulphite
Identifiers
CAS Number    
7631-90-5 check
3D model (JSmol)    
Interactive image
ChEBI    
CHEBI:26709 check
ChEMBL    
ChEMBL1689285 ☒
ChemSpider    
571016 check
ECHA InfoCard    100.028.680 
E number    E222 (preservatives)
PubChem CID    
23665763
RTECS number    
VZ2000000
UNII    
TZX5469Z6I check
CompTox Dashboard (EPA)    
DTXSID8034902
InChI[show]
SMILES[show]
Properties
Chemical formula    NaHSO3
Molar mass    104.061 g/mol
Appearance    White solid
Odor    Slight sulfurous odor
Density    1.48 g/cm3
Melting point    150 °C (302 °F; 423 K)
Boiling point    315 °C (599 °F; 588 K)
Solubility in water    42 g/100 mL
Refractive index (nD)    1.526
Hazards
EU classification (DSD) (outdated)    Harmful (Xn)
R-phrases (outdated)    R22 R31
S-phrases (outdated)    (S2), S25, S46
NFPA 704 (fire diamond)    
NFPA 704 four-colored diamond
021
Flash point    Non-flammable
NIOSH (US health exposure limits):
PEL (Permissible)    none[1]
REL (Recommended)    TWA 5 mg/m3[1]
IDLH (Immediate danger)    N.D.[1]
Related compounds
Other anions    Sodium sulfite
Sodium metabisulfite
Other cations    Potassium bisulfite
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
Sodium bisulfite (or sodium bisulphite, sodium hydrogen sulfite) is a chemical mixture with the approximate chemical formula NaHSO3. Sodium bisulfite in fact is not a real compound,[2] but a mixture of salts that dissolve in water to give solutions composed of sodium and bisulfite ions. It is a white solid with an odour of sulfur dioxide. Regardless of its ill-defined nature, "sodium bisulfite" is a food additive with E number E222.

Synthesis
Sodium bisulfite solutions can be prepared by treating a solution of suitable base, such as sodium hydroxide or sodium bicarbonate with sulfur dioxide.

SO2 + NaOH → NaHSO3
SO2 + NaHCO3 → NaHSO3 + CO2
Attempts to crystallise the product yield sodium disulfite, Na2S2O5.[3]

Reactivity and uses
Further information: bisulfite

A tank containing 25% sodium bisulfite at a water treatment plant in Sunnyvale, California.
Sodium bisulfite is a common industrial reducing agent, as it readily reacts with dissolved oxygen:

2 NaHSO3 + O2 → 2 NaHSO4
It is usually added to large piping systems to prevent oxidative corrosion. In biochemical engineering applications, it is helpful to maintain anaerobic conditions within a reactor.

It is used for preserving food and beverages.

See also
Sodium metabisulfite
Calcium bisulfite
Potassium bisulfite
Croscarmellose sodium
Sulfurous acid

Formula: NaHO3S/NaHSO3
Molecular mass: 104.06
Boiling point: 104°C
Melting point: <-5°C
Relative density (water = 1): 1.34
Vapour pressure, kPa at 20°C: 2.4
Viscosity: 3.64 mPa*s at 20°C 

Product  Identification
Product Name: Sodium Bisulfite
Chemical Formula: NaHSO3
CAS Number: 007631-90-5
Other Designations: Sodium Bisulfite Solution, Sodium Hydrogen Sulfite Solution.
General Use: Food and pharmaceutical preservative, waste water dechlorination agent, laboratory
reagent, reducing agent, dietary supplement, and color preservative

APPLICATIONS
- Dechlorination in municipal wastewater, pulp & paper, power, and textile water treatment plants
- Oxygen scavenger
- Boiler water treatment
- Preservative in photo developer process
- Food additive
- Flue gas desulfurization
- Mild reducing agent in organic synthesis
- Efficiently remove traces or excess amounts of bromine, iodine, osmate esters, chromium trioxide, and potassium permanganate
- Surfactant production

CHEMICAL COMPOSITION
Sodium Bisulfite, wt%    38.0 - 42.0
Sodium Sulfate, wt%    ≤ 3.5%
Iron, (Fe ppm)    ≤ 15
pH    3.6 – 4.6

Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH CHARACTERISTIC ODOUR.

Molecular Weight    104.06 g/mol    Computed by PubChem 2.1 (PubChem release 2019.06.18)
Hydrogen Bond Donor Count    1    Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Hydrogen Bond Acceptor Count    4    Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Rotatable Bond Count    0    Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Exact Mass    103.954409 g/mol    Computed by PubChem 2.1 (PubChem release 2019.06.18)
Monoisotopic Mass    103.954409 g/mol    Computed by PubChem 2.1 (PubChem release 2019.06.18)
Topological Polar Surface Area    79.6 Ų    Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Heavy Atom Count    5    Computed by PubChem
Formal Charge    0    Computed by PubChem
Complexity    33.9    Computed by Cactvs 3.4.6.11 (PubChem release 2019.06.18)
Isotope Atom Count    0    Computed by PubChem
Defined Atom Stereocenter Count    0    Computed by PubChem
Undefined Atom Stereocenter Count    0    Computed by PubChem
Defined Bond Stereocenter Count    0    Computed by PubChem
Undefined Bond Stereocenter Count    0    Computed by PubChem
Covalently-Bonded Unit Count    2    Computed by PubChem
Compound Is Canonicalized    Yes

Properties
Related Categories    Chemical Synthesis, Essential Chemicals, Inorganic Salts, Research Essentials, Salts,
Sodium, Sodium Salts, Synthetic Reagents
Less...
Quality Level      200
grade      ACS reagent
assay      ≥58.5% (SO2)
form      powder or crystals
impurities      ≤0.005% insolubles
pH      4.3 (10 g/L)
anion traces      chloride (Cl-): ≤0.02%
Show More (13) 
Description
General description
The aqueous solutions of sodium bisulfite are acidic in nature. Degradation of sodium bisulfite with acid forms sulfur dioxide gas.[4]

Application
Sodium bisulfite (NaHSO3) has been used as a reagent to compose the immunoprecipitation (IP) buffer to chemically modify DNA[2] and to synthesize arsenolipids (AsL).[3]
It can also be used as a reagent during the synthesis of 5,6-dihydrouracil-6-sulfonate.[1]

Sodium Bisulfite is generally immediately available in most volumes. High purity, submicron and nanopowder forms may be considered. including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Sulfites are a preservative many people are sensitive to that can severely aggravate asthma. Their use on fresh fruits and vegetables is banned in the United States, but sulfites are present in other foods. 

What is sodium bisulfite used for?
Sodium Bisulfite is a white, crystalline solid with a slight odor of rotten eggs. It is often in a liquid solution. It is used in making paper and leather, as a food preservative and in dye and chemical production

What is the difference between sodium bisulfite and sodium bisulfate?
4 Answers. In short, bisulphate and bisulphite are not interchangeable, but bisulphite and metabisulphite are. It's reversible in aqueous solution. The assumption that 30 mg of metabisulphite contain the same amount of sulphite as 30 mg of bisulphite is OK, the error is small, about 10 %.

Is sodium bisulfite an oxidizer?
SODIUM BISULFITE is a reducing agent. Emits highly toxic gaseous sulfur dioxide gas when heated to decomposition or on contact with mineral acids.