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30620 Sigma-Aldrich

Sodium hydroxide

puriss. p.a., ACS reagent, reag. Ph. Eur., K ≤0.02%, ≥98%, pellets

Synonym: ‘Caustic soda’

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Properties

Related Categories ACS Grade Acids & Bases, Acids & Bases, Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography,
Quality Level   200
grade   ACS reagent, reag. Ph. Eur.
vapor density   >1 (vs air)
vapor pressure   <18 mmHg ( 20 °C)
  3 mmHg ( 37 °C)
grade   puriss. p.a.
assay   ≥98%
form   pellets
application(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 (PO43-): ≤5 mg/kg
  silicate (as SiO2): ≤10 mg/kg
  sulfate (SO42-): ≤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
SMILES string   [OH-].[Na+]
InChI   1S/Na.H2O/h;1H2/q+1;/p-1
InChI key   HEMHJVSKTPXQMS-UHFFFAOYSA-M

Description

General description

Sodium hydroxide is an inorganic base. It participates in the oxidation of glycerol, catalyzed by Au/charcoal or Au/graphite. It also participates in solvent-free aldol condensation reaction.

Application

Sodium hydroxide may be employed for determination of specific surface area of colloidal silica, via titration. It may be employed for direct oxidation of sodium borohydride, which was investigated by cyclic and linear voltammetry, chronoamperometry and chronopotentiometry. It may be used to compose citrate buffer and borate buffers.
It may be used in the synthesis of following compounds:
• alkylaryl amidosulfobetaines
• (3 -[4-teroctylphenoxyethoxyethoxyethyl] dimethylammonio propane sulfonate (XOSB)
• trisulfobetaines (TriSBn)

Safety & Documentation

Safety Information

Symbol 
GHS05  GHS05
Signal word 
Danger
Hazard statements 
RIDADR 
UN 1823 8 / PGII
WGK Germany 
WGK 1
RTECS 
WB4900000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles

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