disodium sulfite

• ChemBase ID: 129559
• Molecular Formular: Na2O3S
• Molecular Mass: 126.04274
• Monoisotopic Mass: 125.93635342
• SMILES: [O-]S(=O)[O-].[Na+].[Na+]
• Canonical SMILES: [O-]S(=O)[O-].[Na+].[Na+]
• InChI: InChI=1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
• InChIKey: GEHJYWRUCIMESM-UHFFFAOYSA-L

NAMES AND DATABASE IDS

Names

• IUPAC name: disodium sulfite
• IUPAC Traditional name: disodium sulfite
• Synonyms: Hypo clear (photography); E221; Sodium sulfite; Sodium sulfite, ACS; Sodium sulfite, anhydrous; Sodium sulfite; 亚硫酸钠, ACS; 无水亚硫酸钠; 亚硫酸钠

Database IDs

• CAS Number: 7757-83-7
• EC Number: 231-821-4
• MDL Number: MFCD00003503
• Merck Index: 148682
• PubChem SID: 24886336; 24899438; 24848175; 162223850; 24899614; 24858963; 24854370; 24886335
• PubChem CID: 24437
• Chemspider ID: 22845
• Unique Ingredient Identifier: VTK01UQK3G
• Wikipedia Title: Sodium_sulfite

CALCULATED PROPERTIES

• Acid pKa: 1.69897
• H Acceptors: 3
• H Donor: 0
• LogD (pH = 5.5): -3.4536884
• LogD (pH = 7.4): -3.810975
• Log P: -1.1546873
• Molar Refractivity: 10.0845 cm^3
• Polarizability: 5.3231616 Å^3
• Polar Surface Area: 63.19 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: 67.8 g/100 mL (18 °C, heptahydrate) in water; H2O: soluble0.1 g/mL, clear; H2O: soluble1 M at 20 °C, clear, colorless; soluble in glycerol ; insoluble in ammonia, chlorine; Soluble in water, glycerol. Practically insoluble in alcohol
• Apperance: Granular; white solid
• Melting Point: >500°C dec.; 33.4 °C (dehydration of heptahydrate); 500 °C (anhydrous)
• Boiling Point: Decomposes(separate (substances) into constituent elements)
• Flash Point: Non-flammable
• Density: 2.633; 2.633 g/cm^3 (anhydrous); 1.561 g/cm^3 (heptahydrate)
• Refractive Index: 1.565
• pKa: ~9 (heptahydrate)
• Odor: odorless
• pH: 9.0-10.5 (25 °C, 1 M in H2O)

Safety Information

• RTECS: WE2150000
• German water hazard class: 1
• Risk Statements: 31
• TSCA Listed: 是
• EU Index: Not listed
• NFPA704:
  

  0

  2

  0
• Personal Protective Equipment: Gloves
• Supplemental Hazard Statements: Contact with acids liberates toxic gas.

Product Information

• Purity: ≥95.0%; ≥97.0%; ≥97.0% (RT); ≥98%; ≥98.0%; ≥98.0% (RT); 95.0-100.0% (iodometric); 98%; 98.0% min; 98-100.0% (iodometric)
• Grade: ACS reagent; for photographic purposes; JIS special grade; puriss.; puriss. p.a.; purum; purum p.a.; Reag. Ph. Eur.; reagent grade; SAJ first grade
• Suitability: complies for appearance of solution
• Impurities: ≤0.0005% Phosphorus (P); ≤0.001% heavy metals (as Pb); ≤0.005% Insoluble matter; ≤0.005% insolubles; ≤0.02% thiosulfate (S2O3); ≤0.03 meq/g Titr. free base; ≤0.05% thiosulfate (S2O3); Free acid, passes test; insoluble matter, passes filter test; residual solvents, complies
• Cation Traces: Al: ≤0.0005%; Al: ≤5 mg/kg; As: ≤0.1 mg/kg; As: ≤0.2 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤0.01%; Ca: ≤10 mg/kg; Ca: ≤50 mg/kg; Cd: ≤5 mg/kg; Cd: ≤50 mg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤5 mg/kg; Cu: ≤0.0005%; Cu: ≤5 mg/kg; Cu: ≤50 mg/kg; Fe: ≤0.0005%; Fe: ≤0.001%; Fe: ≤10 mg/kg; Fe: ≤5 mg/kg; Fe: ≤50 mg/kg; heavy metals (as Pb): ≤0.001%; K: ≤0.02%; K: ≤200 mg/kg; K: ≤500 mg/kg; Li: ≤5 mg/kg; Mg: ≤0.005%; Mg: ≤20 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; NH4+: ≤0.05%; Ni: ≤5 mg/kg; Ni: ≤50 mg/kg; Pb: ≤0.001%; Pb: ≤5 mg/kg; Pb: ≤50 mg/kg; Se: ≤10 mg/kg; Sr: ≤5 mg/kg; Zn: ≤0.0005%; Zn: ≤10 mg/kg; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: chloride (Cl-): ≤0.02%; chloride (Cl-): ≤100 mg/kg; chloride (Cl-): ≤200 mg/kg; chloride (Cl-): ≤50 mg/kg; thiosulfate (S2O32-): ≤200 mg/kg; thiosulfate (S2O32-): ≤500 mg/kg
• Loss on Drying: ≤0.1% loss on drying, 20 °C (HV)
• Quality: meets analytical specification of Ph. Eur., BP, NF
• Product Line: BioUltra
• abs.: absorption1M/265 nm, H2O cut-off
• Linear Formula: Na2SO3

DETAILS

Sigma Aldrich - 71988

Other Notes
Cleaves disulfide bonds to form the S-sulfonate derivative1; Inhibits gram positive bacteria in culture media;

Sigma Aldrich - 71990

Other Notes
Sales restrictions may apply

Sigma Aldrich - 239321

Packaging
12 kg in poly drum
500 g in poly bottle
2.5 kg in poly bottle

Sigma Aldrich - S0505

包装
2.5 kg in poly bottle
250 g in poly bottle

Sigma Aldrich - 207845

Packaging
500 g in glass bottle

Sigma Aldrich - S4672

包装
1 kg in poly bottle
100, 250 g in poly bottle