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338818

Sigma-Aldrich

Ammonium hydroxide solution

28% NH3 in H2O, ≥99.99% trace metals basis

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Synonym(s):
Ammonia aqueous, Ammonia water
Linear Formula:
NH4OH
CAS Number:
Molecular Weight:
35.05
Beilstein/REAXYS Number:
3587154
MDL number:
eCl@ss:
38060103
PubChem Substance ID:
NACRES:
NA.21

Quality Level

assay

≥99.99% trace metals basis

form

liquid

expl. lim.

27 %

concentration

28% NH3 in H2O

pH

11.7 (20 °C)

density

0.9 g/mL at 25 °C (lit.)
0.9 g/mL at 25 °C

storage temp.

2-8°C

SMILES string

[NH4+].[OH-]

InChI

1S/H3N.H2O/h1H3;1H2

InChI key

VHUUQVKOLVNVRT-UHFFFAOYSA-N

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This Item
2212283050117093
vibrant-m

338818

Ammonium hydroxide solution

vibrant-m

221228

Ammonium hydroxide solution

vibrant-m

30501

Ammonium hydroxide solution

vibrant-m

17093

Ammonium hydroxide solution

assay

≥99.99% trace metals basis

assay

-

assay

-

assay

-

Quality Level

100

Quality Level

200

Quality Level

200

Quality Level

100

form

liquid

form

liquid

form

liquid

form

liquid

density

0.9 g/mL at 25 °C (lit.)

density

0.9 g/mL at 25 °C (lit.)

density

0.892-0.910 g/mL at 20 °C, 0.9 g/mL at 25 °C (lit.)

density

0.91 g/mL at 20 °C, 0.9 g/mL at 25 °C (lit.)

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

storage temp.

2-8°C

General description

Ammonium hydroxide solution is also called aqueous ammonia, aqua ammonia, or ammonia water. It is a weak base mainly used as a nitrogen source to prepare other nitrogen-containing organic and inorganic chemicals such as urea, ammonium carbonate, ammonium sulfate, etc.

Application

Ammonium hydroxide solution (28% NH3 in H2O) can be used as:
  • A medium to prepare magnetite (Fe3O4) nanoparticles via a modified controlled chemical coprecipitation method using divalent or trivalent iron salts as iron precursors.      
  • A reagent in ammonolysis.      
  • A solvent to synthesize 1, 4 dihydropyridines via one-pot condensation of an aldehyde and alkyl acetoacetate.

signalword

Danger

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1 - STOT SE 3

target_organs

Respiratory system

Storage Class

8B - Non-combustible, corrosive hazardous materials

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable


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Protocols

To optimize hydrolysis using β-glucuronidase, factors such as incubation time, temperature, hydrolysis pH, enzyme source, and enzyme concentration must be evaluated for each glucuronide metabolite to be analyzed.

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