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S7907 Sigma-Aldrich

Sodium phosphate dibasic

BioXtra, ≥99.0%

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Synonym: sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate

Sodium phosphate dibasic BioXtra, ≥99.0%
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Properties

Related Categories Apoptosis and Cell Cycle, BioXtra Buffers, Biological Buffers, Buffers, Buffers A to Z,
product line   BioXtra
assay   ≥99.0%
impurities   ≤0.1% Insoluble matter
pH   8.0-11.0 (20 °C, 1 M in H2O)
pKa (25 °C)   (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
solubility   H2O: soluble1 M at 20 °C, clear, colorless
anion traces   chloride (Cl-): ≤0.05%
  sulfate (SO42-): ≤0.05%
cation traces   Al: ≤0.0005%
  Ca: ≤0.002%
  Cu: ≤0.0005%
  Fe: ≤0.002%
  K: ≤0.005%
  Mg: ≤0.005%
  NH4+: ≤0.05%
  Pb: ≤0.001%
  Zn: ≤0.0005%
abs.   A1M/260, H2O <0.05
  A1M/280, H2O <0.05
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