Ultra-high purity ammonia (>99.999%)

Description

1. Product Overview
Ultra-high purity ammonia (>99.999%) is a specialty gas with residual moisture and oxygen controlled below 0.5 ppm. It is primarily used in metal organic chemical vapor deposition (MOCVD) for LED and power semiconductor production. The key value proposition is defect-free epitaxial growth and reduced equipment fouling. Strategically, it enables advanced electronics manufacturing where sub-ppm contaminants directly impact device performance and profitability.

2. Key Specifications & Technical Characteristics

• Chemical composition: Ammonia (NH₃) with trace impurities controlled to <1 ppm each (O₂, H₂O, CO, CO₂, THC)

• Purity level: ≥99.999% (5N); optional 6N available for leading-edge nodes

• Physical characteristics: Colorless, liquefied compressed gas; vapor density 0.59 (air=1); boiling point -33.34°C

• Packaging options: DOT/ISO-compliant cylinders (47L, 500L, 950L), Y-ton containers, and ISO-tanks for bulk cryogenic liquid delivery

• Shelf life: 24 months when stored below 40°C in sealed, corrosion-resistant cylinders

3. Core Industrial Applications

• Semiconductors & LEDs: MOCVD chamber feed for gallium nitride (GaN) epilayers – purity directly drives luminescence efficiency and wafer yield.

• Solar cells: Passivation layer deposition (PERC, TOPCon) – reduced parasitic reactions increase module efficiency by 0.3–0.5%.

• Specialty chemicals & pharmaceuticals: Precursor for high-purity ammonium salts and active ingredients – eliminates costly rework.

• Cost advantage over alternatives: Lower cylinder change frequency due to higher purity stability, and reduced scrubber maintenance from fewer reactive impurities.

4. Competitive Advantages

• Quality consistency: Real-time FTIR and cavity ring-down spectroscopy (CRDS) certification per batch; lot-to-lot impurity variance <15%.

• Supply reliability: Multi-source gas fractionation hubs (Asia, North America, Europe) with 99.5% on-time-in-full rate.

• Logistics capability: Dedicated stainless steel tube trailers and field-installed VIM/CGA cylinders for cleanroom integration.

• Sustainability: Zero liquid discharge during purification; cylinder return program reduces single-use waste by 70%.

• Technical support: On-site sampling and contamination root-cause analysis included for contract volumes.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 1 ISO-tank equivalent (approx. 8 MT) for first-time buyer; ongoing MOQ negotiable above 15 MT/quarter.

• BULK 20MT loading capacity: Yes – 20 MT per ISO container tank (22,000L water capacity, max fill 85% by volume at 25°C).

• MT per container: 20 metric tons net weight per standard 20-ft cryogenic ISO container.