1.06342

Sodium dihydrogen phosphate dihydrate

for analysis EMSURE^® Reag. Ph Eur

• Synonym(s): Sodium phosphate monobasic dihydrate, mono-Sodium orthophosphate, Sodium biphosphate, Sodium phosphate monobasic, Sodium dihydrogen phosphate dihydrate
• Linear Formula: NaH₂PO₄ · 2H₂O
• CAS Number: 13472-35-0
• Molecular Weight: 156.01
• NACRES: NA.21
• EC Index Number: 231-449-2
• UNSPSC Code: 12352302
• MDL number: MFCD00149209
• Assay: 99.0-100.5% dry basis (alkalimetric)
• Form: crystals
• Solubility: 850 g/L

Properties

• agency: reag. Ph. Eur.
• Quality Segment: 300
• product line: EMSURE^®
• assay: 99.0-100.5% dry basis (alkalimetric)
• form: crystals
• potency: 8290 mg/kg LD₅₀, oral (Rat), >7940 mg/kg LD₅₀, skin (Rabbit)
• impurities: ≤0.15% In water insoluble matter (calculated on dried substance)
• loss: 21.5-24.0% loss on drying, 130 °C
• pH: 4.5 (25 °C, 12 g/L in H₂O)
• mp: 60 °C
• solubility: 850 g/L
• density: 1.915 g/cm³ at 20 °C
• bulk density: 1000 kg/m³
• anion traces: chloride (Cl^-): ≤0.0005%, fluoride (F^-): ≤0.001%, phosphate, phosphite (as H₃PO₄): ≤0.5%, sulfate (SO₄^2-): ≤0.01%
• cation traces: Al:, passes test (detectable with ammonia), As: ≤0.00005%, Ca: ≤0.005%, Ca:, passes test (detectable with ammonia), Cd: ≤0.0001%, Co: ≤0.005%, Cu: ≤0.005%, Fe: ≤0.001%, Hg: ≤0.0001%, K: ≤0.005%, Mg: ≤0.005%, N: ≤0.001%, Ni: ≤0.005%, Pb: ≤0.0004%, Zn: ≤0.025%, heavy metals (as Pb): ≤0.0005%
• storage temp.: 2-30°C
• SMILES string: O.O.[Na+].OP(O)([O-])=O
• InChI: 1S/Na.H3O4P.2H2O/c;1-5(2,3)4;;/h;(H3,1,2,3,4);2*1H2/q+1;;;/p-1
• InChI key: VBJGJHBYWREJQD-UHFFFAOYSA-M

Description

Analysis Note

Identity: passes test
Appearance of solution: passes test
Assay (alkalimetric, calculated on dried substance): 99.0 - 100.5 %
In water insoluble matter (calculated on dried substance): ≤ 0.15 %
pH-value (1 %, water): 4.1 - 5.0
pH-value (5 %; water): 4.2 - 4.5
Chloride (Cl): ≤ 0.0005 %
Fluoride (F): ≤ 0.001 %
Total nitrogen (as N): ≤ 0.001 %
Hydrogenphosphate (HPO₄): ≤ 0.5 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.0005 %
Al, Ca and other elements detectable with ammonia: passes test
As (Arsenic): ≤ 0.00005 %
Ca (Calcium): ≤ 0.005 %
Cd (Cadmium): ≤ 0.0001 %
Co (Cobalt): ≤ 0.005 %
Cu (Copper): ≤ 0.005 %
Fe (Iron): ≤ 0.001 %
Hg (Mercury): ≤ 0.0001 %
K (Potassium): ≤ 0.005 %
Mg (Magnesium): ≤ 0.005 %
Ni (Nickel): ≤ 0.005 %
Pb (Lead): ≤ 0.0004 %
Zn (Zinc): ≤ 0.025 %
Substances reducing potassium permanganate (as O): passes test
Loss on drying (130 °C): 21.5 - 24.0 %
Corresponds to Reag. Ph. Eur.

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable