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306576

Sigma-Aldrich

Sodium hydroxide

pellets, semiconductor grade, 99.99% trace metals basis

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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

semiconductor grade

Quality Level

vapor density

>1 (vs air)

vapor pressure

<18 mmHg ( 20 °C)
3 mmHg ( 37 °C)

assay

99.99% trace metals basis

form

pellets

technique(s)

HPLC: suitable

impurities

<1% Na2CO3

mp

318 °C (lit.)

solubility

water: soluble 1,260 g/L at 20 °C

density

2.13 g/cm3 at 20 °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
221465655104484024
vibrant-m

306576

Sodium hydroxide

-
vibrant-m

221465

Sodium hydroxide

-
vibrant-m

655104

Sodium hydroxide

Essential Grade
vibrant-m

484024

Sodium hydroxide

-
assay

99.99% trace metals basis

assay

≥97.0%

assay

97%

assay

97%

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

100

density

2.13 g/cm3 at 20 °C

density

2.13 g/cm3 at 20 °C

density

2.13 g/cm3 at 20 °C

density

2.13 g/cm3

form

pellets

form

pellets

form

powder

form

flakes

vapor pressure

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

vapor pressure

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

vapor pressure

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

vapor pressure

<18 mmHg ( 20 °C), 3 mmHg ( 37 °C)

General description

Sodium hydroxide (caustic soda, NaOH) is a water-soluble inorganic base with a wide range of industrial applications such as titration methods, dissolution testing, and pH adjusting. It is also used as a precipitant to precipitate transition metal hydroxides.

Application

Sodium hydroxide is used as a reagent:

  • for the preparation of synthesis solution during the formation of LTA zeolite crystals in the hydrothermal synthesis process.
  • in the synthesis of 2-line ferrihydrite (spHm) and rhombohedral Hm (rhHm) and as a base to adjust the pH of the mixed solution.
  • to raise the pH of the HEPES buffer during catalytic reactivity to nanoparticle (CRNP) assay and synthesis.
  • in the synthesis of zinc oxide nanoparticles from zinc chloride during lithium doping impact on the cathodoluminescence of the nanoparticles.

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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Crystal dissolution by particle detachment
Guomin Z, et al.
Nature Communications, 14, 6300-6300 (2023)
Dry powder assay rapidly detects metallic nanoparticles in water by measuring surface catalytic reactivity.
Xiangyu B, et al.
Environmental Science & Technology, 52, 13289-13297 (2018)
Chemoselective, solvent-free aldol condensation reaction.
Raston CL and Scott JL.
Green Chemistry, 22(2), 49-52 (2000)
Zeolite LTA/carbon membranes for air separation
Sonia D D, et al.
Microporous and Mesoporous Materials : The Official Journal of the International Zeolite Association, 115, 51-60 (2008)
Effects of lithium doping and post-processing on the cathodoluminescence of zinc oxide nanoparticles
K M, et al.
Microscopy and Microanalysis, 12, 1510-1511 (2006)

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