HF Safety MSE 601 Chris Celania 11/19/201811/19/2018 MSE 601

What is Hydrofluoric Acid (HF) One of Strongest inorganic acids 100% water soluble BP below room temperature Presence in labs as liquids/gases/solutions Often used in etching processes (sometimes in tandem with other acids) Colorless, fumes white, smells similar to HCl Highly toxic 11/19/201811/19/2018 Mse 601

Health risks Penetrates cells and dissociates to begin reacting with body. Systemically reacts with calcium F- + Ca++  CaF2 Enough F in 7 ml of anhydrous HF to bind ALL FREE CALCIUM in average adult. ALL HF EXPOSURES require both First Aid and Medical Treatment. 11/19/201811/19/2018 Mse 601

First Aid and Treatment Flush area if possible for 15 minutes with water Apply calcium gluconate to affected area in appropriate manner (gel or nebulizer) Seek medical attention. Fatal hypocalcemia can occur: ≥25 in2 exposure for ALL concentrations 11/19/201811/19/2018 Mse 601

Safety and PPE Thoroughly review the MSDS Know location of all safety equipment and calcium gluconate Use appropriate storage procedures and PPE for application 11/19/201811/19/2018 Mse 601