- Fume hood for venting
- Rubber gloves
- Safety goggles
- Protective clothing
Please be careful as Multi-Etch WILL bleach your clothes, so take precautions.
Multi-Etch Safety Data Sheets (SDS)
Hydrofluoric acid vs. Multi-Etch
If Multi-Etch splashes on your skin, you can simply rinse it off with no ill effects. If you get hydrofluoric acid on your skin, you want to get medical attention quickly or risk significant tissue damage, even if you rinse it right away: HF is an insidious toxin that continues deep into your body hours and even days after you think you've taken care of it sufficiently.
Here is one report on the seriousness of exposure to hydrofluoric acid: Hydrofluoric Acid Accident .
A major difference between Multi-Etch and hydrofluoric acid is that the fluoride in Multi-Etch is always bound up in solution; it is never released into the air. With hydrofluoric acid, fluoride is out-gassed continuously and it's wise to take air quality samples to make sure the fume hood has no back-draft.
The active ingredient in some consumer rust removers is hydrofluoric acid; if you use one of those products, treat it as an extremely hazardous material.
We'd like to see hydrofluoric use reduced as much as possible in order to provide better safety for employees and a safer environment for us all. See WarOnHF.com for more.
Disposal of used Multi-Etch
For disposal, always check state and local regulations in your area. In some places, it is permissible to sewer neutralized Multi-Etch using copious amounts of water. Hydrofluoric acid requires professional hazmat waste services, which is harder to obtain today due to the fact that fewer companies are willing to pick up hydrofluoric acid waste than in the past.