1.05426

Ammonia solution

32%, EMPLURA^®

• Synonym(s): Ammonium hydroxide solution, Ammonia aqueous, Ammonia water
• Linear Formula: NH₄OH
• CAS Number: 1336-21-6
• Molecular Weight: 35.05
• Beilstein/REAXYS Number: 3587154
• MDL number: MFCD00066650
• UNSPSC Code: 12352402
• NACRES: NA.21

Properties

• product name: Ammonia solution 32%, EMPLURA^®
• vapor pressure: 837 hPa ( 20 °C)
• Quality Level: 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

Description

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

Safety Information

• pictograms: GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H314 - H335 - H410
• pcodes: P261 - P271 - P273 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 8B - Non-combustible, corrosive hazardous materials
• wgk_germany: WGK 2