Protective Measures :

There are several ways to help prevent hydrofluoric acid accidents from occurring in the first place.

1. Never use hydrofluoric acid when working alone or after hours. HF may be used when working alone during regular working hours provided personnel versed in first aid have been alerted and are in the general vicinity.
   
   
2. All personnel, not just those who will be using hydrofluoric acid, should be informed of the dangers of this chemical and the emergency procedures necessary in case of an accident.
   
   
3. All persons who will be using HF must be made aware of its properties and trained in proper procedures for use and disposal.
   
   
4. Companies/Laboratories which keep or use HF gas or concentrated solutions (>1% hydrofluoric acid) should have these emergency procedures on hand as well as an MSDS.
   
   
5. Students should never be given the task of mixing HF solutions. Only experienced persons familiar with its properties should handle the concentrated acid.
   
   
6. A small supply of calcium carbonate or calcium hydroxide should be kept near where the work will be conducted. If a small quantity (100 ml or less) of dilute HF solution is spilled, clean it up by using powdered calcium carbonate or calcium hydroxide. A commercial hydrofluoric acid spill kit can also be used.
   
   If a large amount is spilled, or if the HF is concentrated, contain the spill as much as possible, evacuate the area, and call 911. Avoid exposure to the vapors.
   
   
7. Dispose of unwanted hydrofluoric acid.
   
   
8. When working with hydrofluoric acid or concentrated HF solutions (> 1%):
   • Wear goggles and a face shield.
   • Wear a long-sleeved, buttoned lab coat, pants or long skirt, and closed-toe shoes.
   • Wear Neoprene or Nitrile (22mil) gloves or other hydrofluoric acid resistant gloves (HF burns around the fingernails are extremely painful, difficult to treat, and may require surgical removal of the nail).
   • A chemical resistant apron is also recommended.
9. Make sure to have a tube of Calgonate on hand in case HF comes into contact with the user’s skin.
   
   
10. Any person exposed to HF must seek immediate medical assistance.