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221228

Sigma-Aldrich

Ammonium hydroxide solution

ACS reagent, 28.0-30.0% NH3 basis

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:
3587154
MDL number:
MFCD00066650
UNSPSC Code:
12352106
eCl@ss:
38060103
PubChem Substance ID:
329752250
NACRES:
NA.21

grade

ACS reagent

Quality Level

200

form

liquid

autoignition temp.

1204 °F

expl. lim.

27 %

concentration

28.0-30.0% NH3

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

View returnable container options.

Other Notes

ACS specifications same for product 320145
2024 CiteAb Award Winner for Supplier Succeeding in Parkinson′s Research

Signal Word

Danger

Hazard Statements

H314,H335,H410

Hazard Classifications

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

Target Organs

Respiratory system

Storage Class Code

8B - Non-combustible corrosive hazardous materials

WGK

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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