[Jewelry making - Article 00548] - Re: [Orchid] Working with Titanium

[Jeff Simkins]

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Hi All,

    I have used HF acid for about six years in the lab. I consider
    myself lucky, since I haven't been burned. Last Friday, I cleaned a
    large quartz tube in 10% HF solution. We pour from a 49% wt. HF acid
    bottle, and never use full strength in any lab work. Most solutions
    are 2% HF concentration. 

    Proper handling procedures, personal protective equipment, safety
    showers, and a laboratory grade fume hood, all should be in place
    before using HF acid. 

    Most hospitals have little experience treating HF burns. When they
    are done injecting calcium into the exposed area, you will feel more
    like a pin cushion. 

    HF does not eat through the skin. Instead, it will absorb into your
    body very easily. It will take the calcium from your bone. 

    The best first aid treatment is water! At least 15 minutes of
    flowing water over the affected area is recommended by the MSDS for
    HF acid. Second, a 2% calcium gluconate gel treatment on the exposed
    area has been known to save some people from the calcium injections.
    Third, go to the hospital immediately! 

    All acids can be dangerous. I put HF acid on top of the list.
    Anywhere there is a toxic or highly reactive process, the fluorine
    ion shows up in the mix. 

Jeff

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