# HCFC R-401B — HVAC refrigerant replacements: retrofit compatibility, safety class, GWP and lubricant

For HCFC R-401B, replaces is R-12; trade name(s) is Freon MP66; gwp is 1288; compatible lubricant is AB & MIN; listing status / notes is For service applications only, verified against its source on 2026-08-11.

- **Refrigerant:** HCFC R-401B _(verified: appears in the quote below)_
- **Replaces:** R-12 _(verified: appears in the quote below)_
- **Trade name(s):** Freon MP66 _(verified: appears in the quote below)_
- **GWP:** 1288 _(verified: appears in the quote below)_
- **Compatible lubricant:** AB & MIN _(verified: appears in the quote below)_
- **Listing status / notes:** For service applications only _(verified: appears in the quote below)_

## What the source says

> HCFC R-401B 1288 R-12 L,M AB & MIN POE-32 & MIN POE-32 For service applications only, trade name: Freon MP66

## Source

- https://webapps.copeland.com/online-product-information/Publication/LaunchPDF?Index=AEB&PDF=93-11

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [HVAC refrigerant replacements: retrofit compatibility, safety class, GWP and lubricant](https://referencesource.org/hvac-component-refrigerant-compatibility/).