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1.05426

Ammonia solution

32%, EMPLURA®

Synonym(s):

Ammonium hydroxide solution, Ammonia aqueous, Ammonia water

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About This Item

Linear Formula:
NH4OH
CAS Number:
1336-21-6
Molecular Weight:
35.05
NACRES:
NA.21
UNSPSC Code:
12352402
MDL number:
MFCD00066650
Beilstein/REAXYS Number:
3587154
eCl@ss:
38060103
Concentration:
≥30% (NH3, acidimetric)
Form:
liquid
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Product Name

Ammonia solution 32%, EMPLURA®

vapor pressure

837 hPa ( 20 °C)

Quality Segment

200

product line

EMPLURA®

form

liquid

expl. lim.

27 %

concentration

≥30% (NH3, acidimetric)

impurities

≤0.0001% Heavy metals (as Pb), ≤0.0005% Fe (Iron), ≤0.0008% Substances reducing potassium permanganate (as O), ≤0.002% Chloride (Cl), ≤0.003% Sulphate (SO?)

ign. residue

≤0.003% (as sulphates)

color

APHA: ≤10

bp

37.7 °C/1013 hPa

mp

-91.5 °C

density

0.9 g/mL at 25 °C (lit.)

storage temp.

2-30°C

SMILES string

[NH4+].[OH-]

InChI

1S/H3N.H2O/h1H3;1H2

InChI key

VHUUQVKOLVNVRT-UHFFFAOYSA-N

Application


  • Highly Efficient Recovery of Au(I) from Gold Leaching Solution Using Sodium Dimethyldithiocarbamate.: This study explores the effective recovery of gold using sodium dimethyldithiocarbamate in an ammonia-rich environment, highlighting the interaction with ammonia solution and its impact on the leaching process (Yang et al., 2024).

  • Oxidation mechanism of pyrite in a thiosulfate solution: electrochemical impedance (EIS) and in situ Raman spectroscopy.: Explores the oxidation processes of pyrite in thiosulfate solutions facilitated by ammonia, examining the electrochemical properties and kinetics involved in the oxidation mechanism (Tamayo et al., 2023).

Packaging

Due to quality and safety aspects Ammonia Solution will no longer be offered in glass bottles but solely in HDPE bottles.

Please note the following replacements:
1054261000 (1 L glass bottle) replaced by 1054261011 (1 L HDPE bottle)
1054262500 (2.5 L glass bottle) replaced by 1054262511 (2.5 L HDPE bottle)

More information about our ergonomic and unbreakable HDPE bottles can be found here: www.SigmaAldrich.com/hdpe-bottle

Analysis Note

Assay (acidimetric, NH₃): ≥ 30 %
Identity: passes test
Colour: ≤ 10 Hazen
Chloride (Cl): ≤ 0.002 %
Sulphate (SO₄): ≤ 0.003 %
Heavy metals (as Pb): ≤ 0.0001 %
Fe (Iron): ≤ 0.0005 %
Substances reducing potassium permanganate (as O): ≤ 0.0008 %
Residue on ignition (as sulphates): ≤ 0.003 %

Legal Information

EMPLURA is a registered trademark of Merck KGaA, Darmstadt, Germany

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signalword

Danger

target_organs

Respiratory system

wgk

WGK 2

Hazard Classifications

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

Storage Class

8B - Non-combustible corrosive hazardous materials

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