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CAS 431-86-7

1,2-Dichloro-1,1,3,3,3-pentafluoropropane (HCFC-225da)

HCFC‑225da is a toxic, man‑made solvent once used to clean electronics and aerospace parts [1]. It harms the ozone layer and, at high levels, can affect your nervous system and heart [1][2].

Where It Comes From

Made for precision cleaning and vapor‑degreasing; emissions can occur during manufacture, use, and disposal. New production is highly restricted under ozone‑protection rules [1].

How You Are Exposed

Mainly by breathing vapors at work where it’s used or stored; the general public’s exposure today is expected to be low [1].

Why It Matters

Depletes stratospheric ozone and is a greenhouse gas; short‑term high exposure can cause dizziness, drowsiness, and irregular heartbeat; very high levels can be life‑threatening [1][2].

Who Is at Risk

Workers in electronics, aerospace, and maintenance shops using vapor degreasers; people in poorly ventilated spaces near use areas [1][2].

How to Lower Your Exposure

Use safer alternatives approved by EPA SNAP, ensure local exhaust ventilation, follow labels/SDS, wear appropriate respiratory and skin protection, and dispose through hazardous‑waste programs [1][2].

References

  1. [1]U.S. Environmental Protection Agency (EPA). Phaseout of Hydrochlorofluorocarbons (HCFCs) and ozone‑depleting substances.
  2. [2]U.S. EPA. Significant New Alternatives Policy (SNAP) Program – Risk Screen for Solvent Cleaning Substitutes, including HCFC‑225.

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