Ammonia, Brand Name : yuhan, Pack Size : drum or ibc

Ultra-Pure Ammonia Water Overview

This is ultra-pure ammonia with less than 10 parts per trillion (ppt) of impurities and a purity exceeding 99.999%/99.9999%.

Sold by China Yuhan Technology. If interested, please call or email us to request a CoA and product specifications.

• Assay (NH3): 28.0% to 30.0%
• Color: APA ≤ 5
• Impurities:
  • Chloride (Cl): ≤ 0.01 ppm
  • Carbonate (CO3): ≤ 1 ppm
  • Sulfate (SO4): ≤ 0.01 ppm
  • Phosphate (PO4): ≤ 0.01 ppm
  • Reducing substance (permanganate in KMnO4): ≤ 0.5 ppm
• Metal Impurities (e.g., Al, Sb, As): ≤ 0.05 ppb
• Particle Count:
  • ≥ 0.1 microns: ≤ 200 pcs/ml
  • ≥ 0.2 microns: ≤ 50 pcs/ml
  • ≥ 0.5 microns: ≤ 30 pcs/ml
  • ≥ 1.0 microns: ≤ 10 pcs/ml

• Density: ~0.88 g/cm³ at 20°C
• Boiling Point: ~36°C (varies with concentration)
• Melting Point: ~-77°C
• pH: Strongly alkaline (pH > 11)
• Solubility: Completely miscible with water, reacts with acids
• Decomposition: Releases ammonia gas (NH₃) over time, especially when heated

1. Ammonia Monohydrate (NH₃·H₂O):
   • A weak base formed when ammonia dissolves in water.
   • Partially ionizes in water to form ammonium (NH₄⁺) and hydroxide (OH⁻) ions.
   • Corrosive, with a strong pungent odor, miscible with ethanol.
   • Unstable and decomposes to form ammonia and water.
2. Ammonia Water:
   • An aqueous solution of ammonia (NH₃), primarily composed of NH₃·H₂O.
   • Contains ions NH₄⁺, NH₂⁻, OH⁻, and H₃O⁺.
   • Alkaline, weakly reducing, reacts with acids to form ammonium salts.
   • Forms white smoke when volatile ammonia meets acid mist.

• Semiconductor Industry:
  • RCA cleaning (SC-1) for removing organic matter and particle contamination from wafers.
  • Essential in etching and chemical-mechanical planarization (CMP) processes.
• Electronics Manufacturing:
  • High-purity alkaline etchants for microelectronics and display panels.
  • Key reagents in photoresist stripping.
• Chemistry and Drug Synthesis:
  • High-purity chemical formulations.
  • Precursors to ammonium-based compounds in research and industry.
• Environmental and Analytical Applications:
  • Ultrapure water production and wastewater treatment.
  • Reagents in ICP-MS and other trace analysis techniques.