Sodium phosphate dibasic, Anhydrous, >=99.0%, puriss. p.a., ACS Reagent, ขนาด 1 Kg, Fluka (CAS NO: 7558-79-4)

DESCRIPTION

• General description
• Sodium phosphate is widely used buffer in molecular biology, biochemistry, and chromatographic studies. It exists in three forms: monobasic (NaH₂PO₄), dibasic (Na₂HPO₄), and tribasic (Na₃PO₄). Monobasic and dibasic forms in varying ratios are commonly used to compose the neutral sodium phosphate buffer solution.

PROPERTIES

• Quality Level 200
• grade ACS reagent puriss. p.a.
• assay ≥99.0% (T)
• form powder or crystals
• impurities ≤0.001% total nitrogen (N)
• loss ≤0.2% loss on drying, 105 °C
• pH 8.7-9.3 (25 °C, 50 mg/mL in H₂O)
• pKa (25 °C) (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• anion traces chloride (Cl^-): ≤10 mg/kg sulfate (SO₄^2-): ≤50 mg/kg
• cation traces
• Ca: ≤10 mg/kg
• Cd: ≤5 mg/kg
• Co: ≤5 mg/kg
• Cr: ≤5 mg/kg
• Cu: ≤5 mg/kg
• Fe: ≤5 mg/kg
• K: ≤50 mg/kg
• Mg: ≤5 mg/kg
• Mn: ≤5 mg/kg
• Ni: ≤5 mg/kg
• Pb: ≤5 mg/kg
• Zn: ≤5 mg/kg
• heavy metals: ≤0.001% (by ICP-OES)
• SMILES string [Na+].[Na+].[H]OP([O-])([O-])=O
• InChI 1S/2Na.H3O4P/c;;1-5(2,3)4/h;;(H3,1,2,3,4)/q2*+1;/p-2
• InChI key BNIILDVGGAEEIG-UHFFFAOYSA-L

Specification Sheet

• Product Name Sodium phosphate dibasic puriss. p.a., ACS reagent, anhydrous, ≥99.0% (T)
• Product Number 71640
• Product Brand SIGALD
• CAS Number 7558-79-4
• Molecular Weight 141.96
• TEST SPECIFICATION
• APPEARANCE (COLOR) Colorless or White
• APPEARANCE (FORM) Powder or Crystals
• TITRATION 99.0 - 101.0 %
• TITRATION (METHOD) BACK TITRATION
• INSOLUBLE MATTER ≤ 0.01 %
• SOLUBILITY (COLOR) Colorless
• SOLUBILITY (TURBIDITY) Clear
• SOLUBILITY (METHOD) 25C water 50mg/mL
• PH 8.7 - 9.3
• LOSS ON DRYING ≤ 0.2% 105C
• ACS SPECIFICATIONS MEETS CURRENT ACS REQUIREMENTS
• METAL TRACE ANALYSIS (ICP) CORRESPONDS TO REQUIREMENTS
• ARSENIC (ICP) ≤ 1 mg/kg
• CALCIUM (ICP) ≤ 10 mg/kg
• CADMIUM (ICP) ≤ 5 mg/kg
• COBALT (ICP) ≤ 5 mg/kg
• CHROMIUM (ICP) ≤ 5 mg/kg
• COPPER (ICP) ≤ 5 mg/kg
• IRON (ICP) ≤ 5 mg/kg
• POTASSIUM (ICP) ≤ 50 mg/kg
• MAGNESIUM (ICP )≤ 5 mg/kg
• MANGANESE (ICP) ≤ 5 mg/kg
• NICKEL (ICP) ≤ 5 mg/kg
• LEAD (ICP) ≤ 2 mg/kg
• ZINC (ICP) ≤ 5 mg/kg
• TOTAL SULFUR AS SO4 (ICP) ≤ 50 mg/kg
• Heavy metals (by ICP) ≤ 10 mg/kg
• CHLORIDE (CL) ≤ 10 mg/kg
• TOTAL NITROGEN ≤ 10 mg/kg
• RECOMMENDED RETEST PERIOD 42 Months