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30620

Sigma-Aldrich

Sodium hydroxide

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

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Synonym(s):
‘Caustic soda’
Linear Formula:
NaOH
CAS Number:
Molecular Weight:
40.00
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
puriss. p.a.

Quality Level

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 (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

storage temp.

15-25°C

SMILES string

[OH-].[Na+]

InChI

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

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M

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1 of 4

This Item
71690221465S5881
vibrant-m

30620

Sodium hydroxide

Essential Grade
vibrant-m

71690

Sodium hydroxide

-
vibrant-m

221465

Sodium hydroxide

-
vibrant-m

S5881

Sodium hydroxide

Essential Grade
assay

≥98%

assay

≥98.0% (T)

assay

≥97.0%

assay

≥98%

agency

reag. Ph. Eur.

agency

-

agency

suitable for DIN 38407-42, suitable for EPA 1621, suitable for EPA 533, suitable for EPA 8327, suitable for EPA OTM-45, suitable for SM 4500 - NH3

agency

suitable for EPA 1621, suitable for SM 4500 - NH3

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

form

pellets

form

pellets

form

pellets

form

pellets (anhydrous)

solubility

water: soluble 1260 g/L at 20 °C

solubility

water: soluble 1,260 g/L at 20 °C

solubility

water: soluble 1,260 g/L at 20 °C

solubility

water: soluble 1260 g/L at 20 °C

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)

pictograms

Corrosion

signalword

Danger

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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Chemoselective, solvent-free aldol condensation reaction.
Raston CL and Scott JL.
Green Chemistry, 2(2), 49-52 (2000)
Determination of specific surface area of colloidal silica by titration with sodium hydroxide.
Sears Jr GW.
Analytical Chemistry, 28(12), 1981-1983 (1956)
Silvio Carrettin et al.
Chemical communications (Cambridge, England), (7)(7), 696-697 (2002-07-18)
Glycerol is oxidised to glyceric acid with 100% selectivity using either 1% Au/charcoal or 1% Au/graphite catalyst under mild reaction conditions (60 degrees C, 3 h, water as solvent).
M A Roberts et al.
Analytical chemistry, 69(11), 2035-2042 (1997-06-01)
This report describes a UV laser photoablation method for the production of miniaturized liquid-handling systems on polymer substrate chips. The fabrication of fluid channel and reservoir networks is accomplished by firing 200 mJ pulses from an UV excimer laser at
Kinetics of sodium borohydride direct oxidation and oxygen reduction in sodium hydroxide electrolyte: Part I. BH4- electro-oxidation on Au and Ag catalysts.
Chatenet M, et al.
Electrochimica Acta, 51(25), 5459-5467 (2006)

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