294993

Ammonia

anhydrous, ≥99.98%

• Synonym(s): Ammonia gas
• Linear Formula: NH₃
• CAS Number: 7664-41-7
• Molecular Weight: 17.03
• Beilstein: 3587154
• EC Number: 231-635-3
• MDL number: MFCD00011418
• UNSPSC Code: 12142100
• PubChem Substance ID: 24857750
• NACRES: NA.22

Properties

• grade: anhydrous
• Quality Level: 200
• vapor density: 0.6 (vs air)
• vapor pressure: 8.75 atm ( 21 °C)
• Assay: ≥99.98%
• form: liquefied gas
• autoignition temp.: 1203 °F
• expl. lim.: 25 %
• greener alternative product characteristics: Design for Energy Efficiency; Learn more about the Principles of Green Chemistry.
• pH: ~10-12 (20 °C, 50 g/L)
• pKa (25 °C): 9.25
• bp: −33 °C (lit.)
• mp: −78 °C (lit.)
• solubility: water: 531 g/L at 20 °C
• density: 0.7 g/cm³ at -33 °C
• greener alternative category: Enabling,
• SMILES string: N
• InChI: 1S/H3N/h1H3
• InChI key: QGZKDVFQNNGYKY-UHFFFAOYSA-N

Description

General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency. Find details here.

Application

Ammonia may be used as a base to adjust pH for preparing mixed magnetite-hematite nanoparticles via combustion method. These nanoparticles show promising potential as sorbents for removing heavy metal ions from water.

Anhydrous ammonia has been used in dynamic reaction cell technology (DRC) to remove interfering ions without the loss of sensitivity. It has also been used for adjusting pH during the synthesis of magnetite-hematite mixture by combustion methods.

Reagent for chemical vapor deposition of TiN.

Packaging

Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.

Compatible with the following:

• Aldrich^® lecture-bottle station systems
• Aldrich^® lecture-bottle gas regulators

Other Notes

See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

Safety Information

• Pictograms: GHS04,GHS05,GHS06,GHS09
• Signal Word: Danger
• Hazard Statements: H221 - H280 - H314 - H331 - H410
• Precautionary Statements: P210 - P260 - P280 - P303 + P361 + P353 - P305 + P351 + P338 - P403 + P233 - P410 + P403
• Hazard Classifications: Acute Tox. 3 Inhalation - Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Flam. Gas 2 - Press. Gas Liquefied gas - Skin Corr. 1B
• Supplementary Hazards: EUH071
• Storage Class Code: 2A - Gases
• WGK: WGK 2
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves