The concentration is expressed as %w/w.
1.05426
Ammonia solution
32%, EMPLURA®
Synonym(s):
Ammonium hydroxide solution, Ammonia aqueous, Ammonia water
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$51.60
2.5 L
$97.90
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1 L
$51.60
2.5 L
$97.90
About This Item
Linear Formula:
NH4OH
CAS Number:
Molecular Weight:
35.05
Beilstein:
3587154
MDL number:
UNSPSC Code:
12352402
NACRES:
NA.21
Recommended Products
Product Name
Ammonia solution 32%, EMPLURA®
vapor pressure
837 hPa ( 20 °C)
Quality Level
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
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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
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 %
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
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
8B - Non-combustible, corrosive hazardous materials
WGK
WGK 2
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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Protocols
A guide to create solvent systems used for the thin-layer chromatography assay of Novabiochem products.
Related Content
Our ergonomic 1 L HDPE bottle for acids, bases, and solvents provide an alternative to glass chemical bottles for lab safety in pouring & handling of hazardous chemicals in the laboratory.
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Is the 32% NH3 concentration expressed as %w/w?
1 answer-
Helpful?
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Is Emplura ammonia solution 32% considered technical grade or higher purity?
1 answer-
This product is considered research grade.
Helpful?
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you say that 28% solution of NH3 is a 56.6% NH4OH for calculating molarity. Can you explain the conversion of 28% to 56.6%? What would be the molarity of a 31% NH3 solution of ammonium hydroxide?
1 answer-
It should be 57.6% NH4OH, not 56.6% NH4OH. Using 17.034 as the molecular weight for NH3 and 35.0494 as the molecular weight weight for NH4OH, the calculation would be: (28 grams NH3/100 grams of solution) X (35.0494 grams NH4OH / 17.034 grams NH3) = 57.6 grams NH4OH per 100 grams of solution, or 57.6%.
To calculate the molarity, the density of a 31% NH3 solution is needed. For the calculation, please note that the weight percentage is for NH3, molecular weight 17.034. (31 grams of NH3 / 100 grams of solution) X (890 grams of solution / Liter of solution) X (1 mole NH3 / 17.034 grams NH3) X (1 mole NH4OH / 1 mole NH3) = 16.2 (16.197) moles NH4OH per Liter. The molarity would be 16.2 M.
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