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1 HF Safety Training Environment, Health & Safety 220 Winspear Avenue.

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Presentation on theme: "1 HF Safety Training Environment, Health & Safety 220 Winspear Avenue."— Presentation transcript:

1 1 HF Safety Training Environment, Health & Safety 220 Winspear Avenue

2 2 Overview Chemical and physical information Chemical and physical information Exposure Limits Exposure Limits Hazards Hazards Working safely with HF Working safely with HF Accidents and exposures Accidents and exposures References/Resources References/Resources

3 3 Overview Similar to other acids: Similar to other acids: Fuming liquid, very strong respiratory irritant and corrosive to skinFuming liquid, very strong respiratory irritant and corrosive to skin Moderately high vapor pressureModerately high vapor pressure Unlike other acids: Unlike other acids: Deeply penetrating; symptoms can be delayed for hoursDeeply penetrating; symptoms can be delayed for hours Dilute solutions can cause serious, painful delayed burnsDilute solutions can cause serious, painful delayed burns Splashes of ml of concentrated solutions on the body have caused fatalitiesSplashes of ml of concentrated solutions on the body have caused fatalities

4 4 Chemical & Physical Properties Common concentrations range from 2%-100% (anhydrous) Common concentrations range from 2%-100% (anhydrous) Clear, colorless liquid OR dense white vapor Clear, colorless liquid OR dense white vapor Highly corrosive Highly corrosive Non-flammable Non-flammable Odor threshold 0.04 to 0.13 ppm Odor threshold 0.04 to 0.13 ppm Intolerable, pungent odor Intolerable, pungent odor Boiling 67 °F (19.5°C)

5 5 Chemical & Physical Properties Reactivity: Reactivity: Will attack & dissolve glass, ceramics, leather, natural gum rubber and metals containing silicaWill attack & dissolve glass, ceramics, leather, natural gum rubber and metals containing silica May react with metals to form explosive hydrogen gasMay react with metals to form explosive hydrogen gas Can react violently with other organics and solvents (check compatibility)Can react violently with other organics and solvents (check compatibility)

6 6 Exposure Limits Exposure Limits : Exposure Limits : TLV-3ppm (Ceiling)TLV-3ppm (Ceiling) PEL- 3ppm (TWA)PEL- 3ppm (TWA) STEL-6ppm (15 min.)STEL-6ppm (15 min.) IDLH-30ppmIDLH-30ppm

7 7 Hazards

8 8 Hazards A major exposure to concentrated HF can bind the body's calcium stores from the bones, causing seizures, bone destruction and death. Injuries are dependent on concentration and route of exposure. Injuries from dilute HF may be delayed up to 24 hours; there may be no pain immediately following exposure. Relief of pain is an important guide to success of treatment.

9 9 Inhalation Hazards Mild Exposure (3-15 ppm): Mild Exposure (3-15 ppm): Irritation of nose, throat, respiratory system. Onset may be delayed.Irritation of nose, throat, respiratory system. Onset may be delayed. Shortness of breath, coughing and labored breathing.Shortness of breath, coughing and labored breathing. Severe Exposure: Severe Exposure: Nose, throat burns, edema, spasm, swelling, lung inflammation and pulmonary edema. Hypocalcemia possible.Nose, throat burns, edema, spasm, swelling, lung inflammation and pulmonary edema. Hypocalcemia possible.

10 10 Absorption Hazards Eye: Eye: Liquid and vapor can cause irritation, corneal burns and destruction of eye tissues.Liquid and vapor can cause irritation, corneal burns and destruction of eye tissues. Skin: Skin: SERIOUS, PAINFUL BURNS TO SKIN.SERIOUS, PAINFUL BURNS TO SKIN. Immediate effect upon exposure to strong concentra- tion (>50%) and vapors; symptoms may not show for 8 hrs. if concentration in 20% to 50% range.Immediate effect upon exposure to strong concentra- tion (>50%) and vapors; symptoms may not show for 8 hrs. if concentration in 20% to 50% range. May have 24 hr. latency for exposures to <20% concentration.May have 24 hr. latency for exposures to <20% concentration.

11 11 Ingestion Hazards Acute exposure: Acute exposure: Severe burns to mouth, esophagus and stomach.Severe burns to mouth, esophagus and stomach. Severe systemic effects also possible.Severe systemic effects also possible. INGESTION OF EVEN SMALL AMOUNTS OF HF MAY BE FATAL.INGESTION OF EVEN SMALL AMOUNTS OF HF MAY BE FATAL.

12 12 Working Safely with HF Work in the fume hood Work in the fume hood Transport containers and pour CAREFULLY Transport containers and pour CAREFULLY ADD ACID TO WATER ADD ACID TO WATER Make sure fume hood is working properly – keep sash down Make sure fume hood is working properly – keep sash down Wear PPE Wear PPE

13 13 PPE - Eyewear Safety glasses Safety glasses Goggles (splash-proof) Goggles (splash-proof) Face shields Face shields Store in an area where they can remain free of contamination and damage (drawer or plastic bag) Store in an area where they can remain free of contamination and damage (drawer or plastic bag)

14 14 PPE - Gloves Wear appropriate gloves (Butyl rubber, Saranex, or Tychem. Neoprene, Viton, Polyethylene, Natural Rubber for short times only) Wear appropriate gloves (Butyl rubber, Saranex, or Tychem. Neoprene, Viton, Polyethylene, Natural Rubber for short times only) Check for leaks each time used - change as needed (inner/outer) Check for leaks each time used - change as needed (inner/outer)

15 15 PPE - Chemical Resistant Clothing Chemical aprons Chemical aprons Lab coats Lab coats Coveralls Coveralls Rubber boots Rubber boots Closed toed shoes Closed toed shoes No shorts No shorts Clothes that cover the body Clothes that cover the body

16 16 Safety Equipment All lab personnel should know where to find – and how to use: All lab personnel should know where to find – and how to use: Eyewash and safety showerEyewash and safety shower Spill kitSpill kit First-aid kit – calcium gluconate, glovesFirst-aid kit – calcium gluconate, gloves Fire extinguisherFire extinguisher

17 17 Emergency Numbers Should be posted near the phone Should be posted near the phone Provide a list of who to call in emergencies and their numbers Provide a list of who to call in emergencies and their numbers on campus phones on campus phones

18 18 Written References – Chemical Inventory and MSDS Each lab should have a Chemical Inventory and Chemical Hygiene Plan Each lab should have a Chemical Inventory and Chemical Hygiene Plan For each hazardous chemical, the lab should have an MSDS For each hazardous chemical, the lab should have an MSDS Lab personnel must know the location Lab personnel must know the location Provide copy to emergency personnel Provide copy to emergency personnel

19 19 Storage and Compatibility of HF Store in a cool, dry place, away from light and ignition sources Store in a cool, dry place, away from light and ignition sources DO NOT store HF in glass container – use plastic or teflon DO NOT store HF in glass container – use plastic or teflon Keep containers in corrosive-resistant secondary containment Keep containers in corrosive-resistant secondary containment Segregate from incompatible materials, including strong bases, metals, glass, water, cyanides Segregate from incompatible materials, including strong bases, metals, glass, water, cyanides

20 20 Proper Disposal of HF Acid Waste Store in sealed plastic/teflon bottles Store in sealed plastic/teflon bottles Do not fill bottles to the top Do not fill bottles to the top Fill out a UB hazardous waste label for each bottle when the first drop is added Fill out a UB hazardous waste label for each bottle when the first drop is added Fax EH&S for pickup when bottles full Fax EH&S for pickup when bottles full

21 21 General Safety Keep the lab clean Keep the lab clean Do not eat, drink or store food/drinks in work areas Do not eat, drink or store food/drinks in work areas Make sure all containers of HF are properly labeled Make sure all containers of HF are properly labeled Keep aisles clear Keep aisles clear Keep eyewashes and Keep eyewashes and safety showers accessible safety showers accessible

22 22 Lab Personnel Exposed to HF Contaminated personnel should : Contaminated personnel should : ACT IMMEDIATELY!!!ACT IMMEDIATELY!!! Get another person to help if possibleGet another person to help if possible Remove contaminated clothingRemove contaminated clothing Flush the affected area of the body for a minimum of 15 minutes under the nearest safety showerFlush the affected area of the body for a minimum of 15 minutes under the nearest safety shower If calcium gluconate is available, flush skin for 5 minutes and applyIf calcium gluconate is available, flush skin for 5 minutes and apply

23 23 Lab Personnel Exposed to HF If eyes are affected, use the nearest eyewash for a minimum of 15 minutesIf eyes are affected, use the nearest eyewash for a minimum of 15 minutes If ingested, dilute with water, milk or milk of magnesia – do NOT induce vomitingIf ingested, dilute with water, milk or milk of magnesia – do NOT induce vomiting SEEK MEDICAL ATTENTIONSEEK MEDICAL ATTENTION WEAR GLOVES IF YOU HELP SOMEONE WHO HAS BEEN EXPOSED TO HFWEAR GLOVES IF YOU HELP SOMEONE WHO HAS BEEN EXPOSED TO HF

24 24 References For more information, contact: For more information, contact: Your investigator/professor/teacherYour investigator/professor/teacher EH&S at or at or Honeywell website - Tech_Services.htmHoneywell website - Tech_Services.htm Tech_Services.htm Tech_Services.htm CDC website - acts.aspCDC website - acts.asp acts.asp acts.asp U. of Delaware website - of Delaware website -

25 25 Questions???


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