R-421A Refrigerant Gas | Alper Refrigerant Gas — Wholesale HFC Refrigerants Refrigerant

HFC/HCFC blend for R-22 replacement in commercial air conditioning. Excellent performance in existing systems.

🔄 R‑421A (Choice™ R‑421A / R-421A) – HFC Blend for R‑22 Retrofits

Category: Hydrofluorocarbon (HFC) – zeotropic blend, direct drop‑in replacement for R‑22 in AC and refrigeration systems.

🧪 Composition & CAS Numbers

R‑125 (Pentafluoroethane) – 354‑33‑6, approx. 58 %

R‑134a (1,1,1,2‑Tetrafluoroethane) – 811‑97‑2, approx. 42 %

(Blend purity ≥ 99.5 %)

📊 Technical Specs

Boiling Point (1 atm): ≈ –40.2 °C (–41.2 °F)

Critical Temperature / Pressure: ≈ 82.9 °C / 3,917 kPa (568 psia)

Molar Mass: ~111.7 g/mol

Temperature Glide: Minimal (only two components)

GWP (AR4): ≈ 2,631

Safety Class: ASHRAE A1 – non-toxic, non-flammable

Ozone Impact (ODP): 0 — chlorine-free

UN Shipping Code: UN 1078 – liquefied non-flammable gas

Airgas

⚙️ Benefits & Performance

True R‑22 Drop-In: Nearly identical pressure-temperature characteristics—no TXV or component changes needed

Oil Compatibility: Works with mineral oil (MO), alkylbenzene (AB), and POE—no oil change required in most cases

Broad Application Range: Suited for residential, commercial, industrial refrigeration, transport chillers, heat pumps, bakery coolers, and more

Low Glide, Easy Charging: Two-component blend ensures consistent performance and liquid-phase charging maintains system balance

User-Friendly Maintenance: Systems can be topped off with R‑421A without requiring a full evacuation

📦 Packaging & Usage Notes

Cylinder Sizes: 12 lb, 25 lb, 110 lb—available in standard R‑22 service cylinders

Storage & Handling: Store upright in cool, ventilated spaces (<52 °C), protect from direct heat; use PPE to avoid frostbite

Safety Precautions: Avoid inhalation; risk of oxygen displacement in confined spaces; contain leaks per F‑Gas and EPA regulations

✅ Why Choose R‑421A from AlperRefrigas

Efficient Retrofits: Minimize labor and downtime—no oil or hardware changes, compatible with existing R‑22 equipment

Performance Integrity: Maintains capacity and COP close to R‑22, with proven solutions across industries

Green & Compliant: Zero ODP, recognized under U.S. SNAP and EU F‑Gas frameworks

Trusted Supply Chain: Supported by Choice, A‑Gas, Hudson, Airgas, and others—globally available

📞 Order R‑421A from AlperRefrigas in convenient cylinder sizes with SDS, PT charts, and retrofit support. Ideal for HVAC/R pros needing a reliable R‑22 alternative.