Sodium hydroxide

200

reag. Ph. Eur.

>1 (vs air)

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

ACS reagent, puriss. p.a.

≥98%

pellets

titration: suitable

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

318 °C (lit.)

water: soluble 1260 g/L at 20 °C

2.13 g/cm³ at 20 °C

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

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

15-25°C

[OH-].[Na+]

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

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