无水碳酸钠

InChI key

CDBYLPFSWZWCQE-UHFFFAOYSA-L

InChI

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

SMILES string

O=C(O[Na])O[Na]

grade

ACS reagent, puriss. p.a.

agency

USP/NF, reag. ISO, reag. Ph. Eur.

assay

≥99.8% (calc. to the dried substance)

form

coarse powder

impurities

residual solvents, complies, ≤0.001% total nitrogen (N), ≤0.003% total S (as SO₄), ≤0.01% in water insoluble matters

loss

≤0.5% loss on drying, 300 °C

pH

12 (25 °C, 106 g/L)

mp

851 °C (lit.)

anion traces

chloride (Cl^-): ≤10 mg/kg, phosphate (PO₄^3-): ≤10 mg/kg, silicate (as SiO₂): ≤20 mg/kg

cation traces

Ag: ≤5 mg/kg, Al: ≤10 mg/kg, As: ≤0.5 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤50 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, Li: ≤5 mg/kg, Mg: ≤20 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤20 mg/kg, Zn: ≤5 mg/kg, heavy metals: ≤5 ppm (by ICP-OES)

Quality Level

200