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17093

Sigma-Aldrich

Ammonium hydroxide solution

puriss. p.a. plus, ≥25% NH3 in H2O

Synonym(s):

Ammonia aqueous, Ammonia water

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About This Item

Linear Formula:
NH4OH
CAS Number:
1336-21-6
Molecular Weight:
35.05
Beilstein/REAXYS Number:
3587154
MDL number:
MFCD00066650
UNSPSC Code:
12352106
eCl@ss:
38060103
PubChem Substance ID:
329751483
NACRES:
NA.21

grade

puriss. p.a. plus

form

liquid

expl. lim.

27 %

concentration

≥25% NH3 in H2O

evapn. residue

≤0.001%

pH

11.7 (20 °C)

density

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

anion traces

chloride (Cl-): ≤0.2 mg/kg
phosphate (PO43-): ≤0.2 mg/kg
sulfate (SO42-): ≤1 mg/kg

cation traces

Ag: ≤0.01 mg/kg
As, Sb (as As): ≤0.01 mg/kg
Au: ≤0.01 mg/kg
B: ≤0.01 mg/kg
Ba: ≤0.01 mg/kg
Be: ≤0.01 mg/kg
Bi: ≤0.01 mg/kg
Ca: ≤0.01 mg/kg
Cd: ≤0.01 mg/kg
Co: ≤0.01 mg/kg
Cr: ≤0.01 mg/kg
Cs: ≤0.01 mg/kg
Cu: ≤0.01 mg/kg
Fe: ≤0.01 mg/kg
Ga: ≤0.01 mg/kg
Ge: ≤0.01 mg/kg
In: ≤0.01 mg/kg
K: ≤0.01 mg/kg
Li: ≤0.01 mg/kg
Mg: ≤0.01 mg/kg
Mn: ≤0.01 mg/kg
Mo: ≤0.01 mg/kg
Na: ≤0.01 mg/kg
Ni: ≤0.01 mg/kg
Pb: ≤0.01 mg/kg
Pt: ≤0.01 mg/kg
Sn: ≤0.01 mg/kg
Sr: ≤0.01 mg/kg
Ti: ≤0.01 mg/kg
Tl: ≤0.01 mg/kg
V: ≤0.01 mg/kg
Zn: ≤0.01 mg/kg
Zr: ≤0.01 mg/kg

SMILES string

[NH4+].[OH-]

storage temp.

2-8°C

InChI

1S/H3N.H2O/h1H3;1H2

InChI key

VHUUQVKOLVNVRT-UHFFFAOYSA-N

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General description

Ammonium hydroxide is a weak base mainly used as a source to prepare other ammonium compounds like urea, ammonium carbonate and ammonium sulfate etc.
Ammonium hydroxide solution is a solution of 30-33% NH3 in H2O. It is a colorless liquid having a strong characteristic odor. Electrolytic deposition of silver onto vitreous carbon electrodes from ammonium hydroxide solutions by the potential step technique has been reported.

Application

Ammonium hydroxide solution may be used in the following studies:
  • Preparation of magnetic nanoparticles.
  • To investigate the effect of substrate on the morphology of ZnS thin films by chemical bath deposition.
  • Preparation of amine functionalized cellulose nanocrystals (CNC-NH2).
  • Wet processing of the GaAs(100) surface.
Ammonium hydroxide solution may be used:
  • As a medium to prepare magnetite (Fe3O4) nanoparticles via a modified controlled chemical coprecipitation method.
  • As a solvent and reagent to prepare 4-aryl and 4-alkyl-2,6-dimethyl-1,4-dihydro-3,5-pyridinedicarboxylates via Hantzsch synthesis in a microwave cavity synthesizer.

signalword

Danger

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 2 - 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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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An efficient and fast procedure for the Hantzsch dihydropyridine synthesis under microwave conditions.
Oehberg L and Westman J
Synlett, 2001(08), 1296-1298 (2001)
Jong-Hee Kim et al.
Journal of nanoscience and nanotechnology, 14(11), 8739-8744 (2015-05-12)
Magnetic nanoparticles were synthesized by the addition of ammonium hydroxide to an iron chloride solution by chemical co-precipitation. In order to examine systematically the crystal phase, average size, and magnetic properties of the magnetic nanoparticles, the following were used as
Synthesis and characterization of biocompatible Fe3O4 nanoparticles.
Sun J, et al.
Journal of Biomedical Materials Research Part A, 80(2), 333-341 (2007)
Synchrotron photoemission spectroscopy study of ammonium hydroxide etching to prepare well-ordered GaAs (100) surfaces.
Lebedev MV, et al.
Applied Surface Science, 229(1), 226-232 (2004)
Claudia M Gómez-Gutiérrez et al.
Scanning, 37(6), 389-392 (2015-05-27)
In this work, the influence of substrate on the morphology of ZnS thin films by chemical bath deposition is studied. The materials used were zinc acetate, tri-sodium citrate, thiourea, and ammonium hydroxide/ammonium chloride solution. The growth of ZnS thin films
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