Pet Safety / Compounds / R-407C (HFC-407C refrigerant blend)

Is R-407C (HFC-407C refrigerant blend) safe for dogs and cats?

Low risk for pets

Low risk.

What is r-407c (hfc-407c refrigerant blend)?

Also known as: HFC-407C, R-407C refrigerant, Suva 407C, Genetron 407C.

Molecular formula
Blend

Risk for dogs

Low risk

Low risk.

Risk for cats

Low risk

Low risk.

Regulatory consensus

5 regulatory and scientific bodies have classified R-407C (HFC-407C refrigerant blend). The classifications differ — that's the data.

AgencyYearClassificationNotes
KIGALI AMENDMENT—Subject to HFC phase-down
EU F GAS—Subject to phase-down. GWP>750 banned in new single split AC since 2025
EPA SNAP—Acceptable substitute for R-22 in residential and commercial AC
ASHRAE 34—A1 — lower toxicity, non-flammable
EPA AIM—Subject to AIM Act production/consumption phase-down

Regulators apply different standards of evidence — animal-data weighting, exposure-pattern assumptions, epidemiological power thresholds — which is why two scientific bodies can review the same data and reach different conclusions. The disagreement is the data.

Where pets encounter r-407c (hfc-407c refrigerant blend)

  • Residential Hvac — Retrofitted residential AC and heat pumps (converted from R-22)
  • Commercial Hvac — Retrofitted commercial rooftop units, split systems, packaged units
  • Chillers — Some small-to-medium screw and scroll chillers
  • Dehumidifiers — Commercial and residential dehumidification equipment

Safer alternatives

Lower-risk approaches that achieve a similar outcome to R-407C (HFC-407C refrigerant blend):

  • R-32
    Trade-offs: Alternative approach; specific tradeoffs depend on application context, scale, and regulatory requirements. Full hazard assessment of alternative recommended before adoption to avoid regrettable substitution.
    Relative cost: 1.2-2×
  • R-454B (Opteon XL41)
    Trade-offs: Improved safety/efficacy profile based on structure-activity optimization; may lack long-term safety data compared to established drugs; patent protection means higher cost until generic entry.
    Relative cost: 1.2-2×
  • R-290 (Propane)
    Trade-offs: Removes 95-99% of dissolved contaminants including metals, PFAS, nitrates; wastes 2-4 gallons per gallon produced (improving with newer systems); removes beneficial minerals; $0.05-0.25/gallon; requires pre-treatment for longevity.
    Relative cost: 1.2-2×

Frequently asked questions

Is r-407c (hfc-407c refrigerant blend) safe for pets?

Low risk.

What products contain r-407c (hfc-407c refrigerant blend)?

R-407C (HFC-407C refrigerant blend) appears in: Retrofitted residential AC and heat pumps (converted from R-22) (Residential Hvac); Retrofitted commercial rooftop units, split systems, packaged units (Commercial Hvac); Some small-to-medium screw and scroll chillers (Chillers).

Why do regulators disagree about r-407c (hfc-407c refrigerant blend)?

R-407C (HFC-407C refrigerant blend) has been classified by 5 agencies including KIGALI AMENDMENT, EU F GAS, EPA SNAP, ASHRAE 34, EPA AIM, with differing conclusions. Regulators apply different standards of evidence (animal data weighting, exposure-pattern assumptions, epidemiological power thresholds), which is why two scientific bodies can review the same data and reach different conclusions. See the regulatory consensus table on this page for the full picture.

See R-407C (HFC-407C refrigerant blend) in the pets app

Look up products containing r-407c (hfc-407c refrigerant blend), compare to alternatives, and explore the full data record.

Open in pets View raw API data

Sources (1)
  1. — expert_curation

Reference data, not professional advice. Aggregates publicly available regulatory and scientific data; not a substitute for veterinary, medical, legal, or regulatory advice. Why we built ALETHEIA →