氢氧化钠

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M

InChI

1S/Na.H2O/h;1H2/q+1;/p-1

grade

ACS reagent, puriss. p.a.

agency

reag. Ph. Eur.

vapor density

>1 (vs air)

vapor pressure

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

assay

≥98%

form

pellets

technique(s)

titration: suitable

impurities

≤0.0003% total nitrogen (N), ≤0.0005% heavy metals (as Pb), ≤1% Na₂CO₃

mp

318 °C (lit.)

solubility

water: soluble 1260 g/L at 20 °C

density

2.13 g/cm³ at 20 °C

anion traces

chloride (Cl^-): ≤10 mg/kg, phosphate (PO₄^3-): ≤5 mg/kg, silicate (as SiO₂): ≤10 mg/kg, sulfate (SO₄^2-): ≤30 mg/kg

cation traces

Al: ≤5 mg/kg, As: ≤1 mg/kg, Ca: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, Hg: ≤0.05 mg/kg, K: ≤200 mg/kg, Mg: ≤5 mg/kg, Ni: ≤5 mg/kg, Pb: ≤2 mg/kg, Zn: ≤5 mg/kg

storage temp.

15-25°C

Quality Level

200