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HydrofluoricAcid
Volume 3 / Issue 7
UNDER THE MICROSCOPE The Dartmouth College laboratory safety newsletter
ContactEHSforspecificques8ons,[email protected]
**IfyourlabusesHydrofluoricAcid(HF),becertainyouhaveatubeofcalciumgluconate(Calgonate®)topicalgelfortreatmentofexposures.**EHShasafreshsupplyofCalgonate®gel.Checktheexpira-ondateonyourcurrenttubeofgel.
Ifyourtubeisexpired…[email protected] to working with or purchasing HF for the first time,
consult with EHS.
All exposures to HF must be treated as a medical emergency.
Immediately flush with water then apply calcium gluconate gel repeatedly every 10 minutes.
Call 911 (GMS@DHMC dial 5555)
EHSStaffMaureen, Michael, Katrina, Sandy, Ryan, Jeff, Caitlyn, Molly, Jason !
EHS main page: h2p://www.dartmouth.edu/~ehs/
§ HFisanacutelytoxicandcorrosivechemical.
§ AtlowconcentraAons(<15%)
exposurecancauseskinburnsthatmaygoundetectedforhours.
§ AthighconcentraAons,deep
skinburnsareimmediateandpainful.
HF burn
q HF etches glass
q Never store HF in or use glass containers
1. PurchaseHFinthesmallestpossiblevolumeandstoreinafumehood
2. Segregatefrom
bases,reducingagents,cyanides,sulfides,glass,ceramicandmetalsurfaces
3. Washyourhandsthoroughlywithsoapandwaterafterremovingyourgloves
4. Neverworkalone
inthelabwithHF
HF penetrates deep and can attack bone.
Calcium gluconate provides extra calcium ions which scavenge free fluorine ions before they penetrate deep into the skin/bone.