Merck Sodium hydrogen carbonate for analysis EMSURE® ACS,Reag.Ph Eur 500G.

Quality Level:  300

Agency:  reag. Ph. Eur.

product line:  EMSURE®

Assay:  99.0-101.0% (acidimetric)

            99.7-100.3% dry basis (acidimetric)

Form:  powder

Potency:  4220 mg/kg LD50, oral (Rat)

Impurities:  ≤0.0065% Iodine reducing matter (as I)

                   ≤0.015% Insoluble matter

Loss:  ≤0.2% loss on drying, Silica gel

pH:  8.6 (20 °C, 50 g/L in H2O)

pKa (25 °C):  (1) 6.37, (2) 10.25 (carbonic acid)

mp:  270 °C (decomposition)

solubility:  96 g/L

density:  2.22 g/cm3 at 20 °C

              2.16 g/mL at 25 °C (lit.)

bulk density:  1000 kg/m3

anion traces:

chloride (Cl-): ≤0.002%

phosphate (PO43-): ≤0.001%

phosphate, silicate (as SiO2): ≤0.005%

sulfate (SO42-): ≤0.015%

sulfur compounds (as SO42-): ≤0.003%

cation traces:

As: ≤0.0002%

Ca: ≤0.01%

Cu: ≤0.0002%

Fe: ≤0.0005%

K: ≤0.005%

Mg: ≤0.005%

N: ≤0.0005%

NH4+: ≤0.0005%

Pb: ≤0.0005%

heavy metals (as Pb): ≤0.0005%

storage temp.:  2-30°C

SMILES string:  [Na+].OC([O-])=O

InChI:  1S/CH2O3.Na/c2-1(3)4;/h(H2,2,3,4);/q;+1/p-1

Appearance of solution: passes test

Identity: passes test

Assay (acidimetric; calculated on dried substance): 99.7 - 100.3 %

Assay (acidimetric): 99.0 - 101.0 %

Insoluble matter: ≤ 0.015 %

pH-value (5 %; water): ≤ 8.6

Chloride (Cl): ≤ 0.002 %

Phosphate (PO₄): ≤ 0.001 %

Sulfate (SO₄): ≤ 0.015 %

Phosphate and Silicate (as SiO₂): ≤ 0.005 %

Sulfur compounds (as SO₄): ≤ 0.003 %

Total nitrogen (N): ≤ 0.0005 %

Ammonium (NH₄): ≤ 0.0005 %

Heavy metals (as Pb): ≤ 0.0005 %

As (Arsenic): ≤ 0.0002 %

Ca (Calcium): ≤ 0.01 %

Cu (Copper): ≤ 0.0002 %

Fe (Iron): ≤ 0.0005 %

K (Potassium): ≤ 0.005 %

Mg (Magnesium): ≤ 0.005 %

Pb (Lead): ≤ 0.0005 %

Iodine reducing matter (as I): ≤ 0.0065 %

Loss on drying (Silica gel): ≤ 0.20 %

Corresponds to ACS, Reag. Ph Eur

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