disodium bicyclo[3.3.1]tetraboroxane-3,7-bis(olate)

• ChemBase ID: 134111
• Molecular Formular: B4Na2O7
• Molecular Mass: 201.21934
• Monoisotopic Mass: 201.9811625
• SMILES: B1(OB2OB(OB(O1)O2)[O-])[O-].[Na+].[Na+]
• Canonical SMILES: [O-]B1OB2OB(OB(O1)O2)[O-].[Na+].[Na+]
• InChI: InChI=1S/B4O7.2Na/c5-1-7-3-9-2(6)10-4(8-1)11-3;;/q-2;2*+1
• InChIKey: UQGFMSUEHSUPRD-UHFFFAOYSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: disodium bicyclo[3.3.1]tetraboroxane-3,7-bis(olate)
• IUPAC Traditional name: disodium bicyclo[3.3.1]tetraboroxane-3,7-bis(olate)
• Synonyms: Borax solution; Sodium tetraborate buffer solution; Buffer solution pH 9.0 (20 °C); Buffer solution pH 10.0 (20 °C); Buffer solution pH 8.0 (20 °C); Borax, fused; Sodium tetraborate; Sodium tetraborate; Borax Anhydrous; Buffer solution pH 9.00 (20°C); Buffer solution HPCE pH 9.0; Boric acid - Sodium tetraborate buffer solution; Buffer solution HPCE pH 8.5; Sodium tetraborate buffer; Buffer solution HPCE pH 8.0; 硼酸钠 溶液; 硼砂 溶液; 四硼酸钠缓冲液 溶液; 缓冲溶液 pH 9.0（20°C）; 缓冲溶液 pH 10.0（20°C）; 缓冲溶液 pH 8.0（20°C）; Borax，熔融; 四硼酸钠; 四硼酸钠; 无水硼砂; 用于 HPCE 的 pH 9.0 缓冲溶液; 用于 HPCE 的 pH 8.5 缓冲溶液; 硼酸-四硼酸钠缓冲液 溶液; 四硼酸钠缓冲液; 用于 HPCE 的 pH 8.0 缓冲溶液

Database IDs

• CAS Number: 1330-43-4
• EC Number: 215-540-4
• MDL Number: MFCD00081185
• PubChem SID: 24888020; 24888009; 24887986; 24886338; 24886339; 162228388; 24895881; 24888004; 24886341; 24887988; 24860323; 24853258; 24888019; 24860408; 24853761; 24888007; 24860384; 24887987
• PubChem CID: 10219853

CALCULATED PROPERTIES

• Acid pKa: -12.53269
• H Acceptors: 4
• H Donor: 0
• LogD (pH = 5.5): -0.8531835
• LogD (pH = 7.4): -0.87984425
• Log P: 1.41
• Molar Refractivity: 44.9309 cm^3
• Polarizability: 10.755107 Å^3
• Polar Surface Area: 104.0 Å^2
• Rotatable Bonds: 0
• Lipinski's Rule of Five: true

PROPERTIES

Physical Property

• Solubility: H2O: soluble0.1 M at 20 °C, clear, colorless
• Apperance: granular (dry); powder
• Melting Point: 741 °C(lit.)
• Density: 1.0 g/mL at 20 °C; 1.000 g/mL at 20 °C; 1.001 g/mL at 20 °C; 1.002 g/mL at 20 °C; 2.367 g/mL at 25 °C(lit.)
• Absorption Wavelength: λ: 260 nm Amax: ≤0.020; λ: 280 nm Amax: ≤0.015
• Conductivity: ~0.2 mS/cm at 20 °C; ~0.3 mS/cm at 20 °C; ~0.5 mS/cm at 20 °C; ~0.7 mS/cm at 20 °C; ~2.5 mS/cm at 20 °C
• Fluorescence: λex 200-600 nm; λem 300-800 nm (corresponds); λex 200-600; λem 300-800 nm (corresponds)
• pH: 7.75 (90 °C); 7.77 (80 °C); 7.80 (70 °C); 7.82 (60 °C); 7.86 (50 °C); 7.90 (40 °C); 7.94 (30 °C); 8.0 (25 °C); 8.00 (20 °C); 8.09 (10 °C); 8.18 (0 °C); 8.5 (25 °C); 8.64 (90 °C); 8.67 (80 °C); 8.71 (70 °C); 8.75 (60 °C); 8.80 (50 °C); 8.86 (40 °C); 8.93 (30 °C); 9.0 (25 °C); 9.00 (20 °C); 9.0-10.5 (25 °C, 0.1 M in H2O); 9.11 (10 °C); 9.24 (0 °C)

Safety Information

• RTECS: ED4588000
• European Hazard Symbols: Toxic (T)
• UN Number: 1760
• German water hazard class: 1; nwg
• Hazard Class: 8
• Packing Group: 2
• Risk Statements: 60-61
• Safety Statements: 53-45
• GHS Pictograms: GHS08
• GHS Signal Word: Danger
• GHS Hazard statements: H360FD
• GHS Precautionary statements: P201-P308 + P313
• Personal Protective Equipment: Eyeshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges; Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter; Eyeshields, Gloves; Eyeshields, Gloves, half-mask respirator (US), multi-purpose combination respirator cartridge (US); Eyeshields, Gloves, type P2 (EN 143) respirator cartridges
• RID/ADR: UN 1760 8/PG 2

Product Information

• Purity: ≥97.0% (T); ≥98%; ≥98.0% (T); ≥99%; ≥99.0%; 99%; 99.998% trace metals basis
• Concentration: 100 mM sodium borate; 20 mM sodium tetraborate; 28 mM total boric acid; 50 g/L; 50 mM total boric acid
• Grade: decomposing agent (for x-ray fluorescence analysis); for HPCE; puriss. p.a.; purum p.a.; SAJ first grade
• Compostion: borax, ~0.013 M; hydrochloric acid, ~0.0046 M; hydrochloric acid, ~0.021 M; sodium hydroxide, ~0.018 M
• Suitability: in accordance for HPCE
• Impurities: ≤0.005% heavy metals (as Pb); ≤3% water; insoluble matter, passes filter test
• Cation Traces: Ag: ≤5 mg/kg; Al: ≤5 mg/kg; As: ≤0.5 mg/kg; Ba: ≤10 mg/kg; Ba: ≤5 mg/kg; Bi: ≤5 mg/kg; Ca: ≤10 mg/kg; Ca: ≤200 mg/kg; Ca: ≤50 mg/kg; Cd: ≤2 mg/kg; Cd: ≤5 mg/kg; Cd: ≤50 mg/kg; Co: ≤2 mg/kg; Co: ≤5 mg/kg; Co: ≤50 mg/kg; Cr: ≤2 mg/kg; Cr: ≤5 mg/kg; Cu: ≤2 mg/kg; Cu: ≤5 mg/kg; Cu: ≤50 mg/kg; Fe: ≤10 mg/kg; Fe: ≤5 mg/kg; Fe: ≤50 mg/kg; K: ≤100 mg/kg; K: ≤50 mg/kg; Li: ≤5 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Mo: ≤5 mg/kg; Ni: ≤2 mg/kg; Ni: ≤5 mg/kg; Ni: ≤50 mg/kg; Pb: ≤2 mg/kg; Pb: ≤5 mg/kg; Pb: ≤50 mg/kg; Sr: ≤5 mg/kg; Tl: ≤5 mg/kg; Zn: ≤5 mg/kg; Zn: ≤50 mg/kg
• Antion Traces: chloride (Cl-): ≤10 mg/kg; chloride (Cl-): ≤1000 mg/kg; chloride (Cl-): ≤50 mg/kg; chloride (Cl-): ≤500 mg/kg; phosphate (PO43-): ≤20 mg/kg; silicate (as SiO2): ≤500 mg/kg; sulfate (SO42-): ≤50 mg/kg; sulfate (SO42-): ≤500 mg/kg
• Clinical: for in vitro diagnostic use
• Shelf Life: (Expiry date on the label.); (limited shelf life, expiry date on the label)
• Loss on Drying: ≤1% loss on drying, 20 °C (HV); ≤1% loss on ignition, 800 °C
• Quality Level: IVD
• Quality: blue colored; traceable to SRM from NIST
• λ: 0.1 M in H2O
• Product Line: BioUltra
• abs.: UV absorption/200-800 nm in accordance
• Linear Formula: Na2B4O7

DETAILS

Sigma Aldrich - HT1002

Application
Kit component in the Silver Stain kit, Procedure No. HT100

Sigma Aldrich - 229946

Packaging
5, 25, 100 g in glass bottle

Sigma Aldrich - 221732

Frequently Asked Questions
Live Chat and Frequently Asked Questions are available for this Product.
Packaging
100, 500 g in poly bottle

Sigma Aldrich - 71996

Other Notes
Reagent for the decomposition of oxides and silicates by fusion1,2

Sigma Aldrich - 33667

General description
This standard solution is tested against certified reference materials from NIST and/or PTB.
Visit our Titration Center to learn more.
Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 82633

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 33547

General description
This material is tested against certified reference materials from NIST and/or PTB.
Visit our Titration Center to learn more.

Sigma Aldrich - 82594

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 82634

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 82604

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter

Sigma Aldrich - 33648

General description
This material is tested against certified reference materials from NIST and/or PTB.
Visit our Titration Center to learn more.
Packaging
The suffix -VP or -VOLPAC in the product number indicates packaging in 5 or 10 L VOLPAC containers.

Sigma Aldrich - 82602

Preparation Note
prepared under clean room conditions and filtered through a 0.2 μm membrane filter