SIGMA CAPS, BioXtra, pH 3.0-7.0 (20 °C, 0.5 M in H2O), =98.0% NaOH basis (titration)

Abs.: A0.5M/260, H₂O ≤0.2

Anion Traces: chloride (Cl^-): ≤0.05%

Assay: ≥98.0% NaOH basis (titration)

Cation Traces: Fe: ≤0.0005%

Ign. Residue: ≤0.1%

Impurities: ≤0.005% Phosphorus (P)

MP: >300°C(lit.)

pH: 3.0-7.0 (20°C, 0.5 M in H₂O)

pKa (25°C): 10.4

pKa: 10.4

Product Line: BioXtra

Solubility: H₂O: soluble0.5 M at 20°C, clear, colorless

Useful pH Range: 9.7 - 11.1