221228

Sigma-Aldrich

Ammonium hydroxide solution

ACS reagent, 28.0-30.0% NH3 basis

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

grade

ACS reagent

assay

28.0-30.0% NH3 basis

form

liquid

autoignition temp.

1204 °F

expl. lim.

27 %

impurities

MnO4- reducers, passes test
≤0.002% CO2

ign. residue

≤0.002%

pH

11.7 (20 °C)

density

0.9 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.5 ppm
nitrate (NO3-): ≤2 ppm
phosphate (PO43-): ≤2 ppm
sulfate (SO42-): ≤2 ppm

cation traces

Fe: ≤0.2 ppm
heavy metals: ≤0.5 ppm (by ICP)

storage temp.

2-8°C

SMILES string

[NH4+].[OH-]

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.

Application

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.

Packaging

6×500 mL in poly bottle
174 L in poly drum
6×500 mL in PVC-coated bottle
500 mL in poly bottle
2.5 L in poly bottle
25, 100, 12×100 mL in poly bottle
6×2.5 L in poly bottle
1 L in PVC-coated bottle
500 mL in PVC-coated bottle
1 L in poly bottle
2.5 L in PVC-coated bottle
6×2.5 L in PVC-coated bottle

Other Notes

ACS specifications same for product 320145
SKU-Pack size with -PCA are packaged in PVC coated glass bottles.

Signal Word

Danger

Hazard Statements

hazcat

Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1 - STOT SE 3

Target Organs

Respiratory system

storage_class_code

8B - Non-combustible, corrosive hazardous materials

WGK Germany

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Christie Ying Kei Lung et al.
Dental materials journal, 32(1), 165-172 (2013-02-02)
The effect of silica-coating by sol-gel process on the bond strength of resin composite to zirconia was evaluated and compared against the sandblasting method. Four groups of zirconia samples were silica-coated by sol-gel process under varied reagent ratios of ethanol...
Isolation and characterization of mesenchymal stem cells.
Odabas SA, et al.
Bone Marrow and Stem Cell Transplantation., 47-63 (2014)
Ramakrishna A
Goyal?s IIT foundation course chemistry: For Class-9, 160-160 (2014)
Synthesis and characterization of biocompatible Fe3O4 nanoparticles.
Sun J, et al.
Journal of Biomedical Materials Research Part A, 80(2), 333-341 (2007)
An efficient and fast procedure for the Hantzsch dihydropyridine synthesis under microwave conditions.
Oehberg L and Westman J
Synlett, 2001(08), 1296-1298 (2001)
Protocols
In the present study we demonstrate compliance of silica gel 60 F254 HPTLC plates with USP requirements, and how HPTLC plates are suitable for the Sildenafil citrate-Limit of Imidazole test.
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