Hydrofluoric Acid HF

1
??? Hydrofluoric Acid - HF
2
??? Hydrofluoric Acid - HF

• ?? Characteristics
• ???? Health hazards
• ???? First aid procedures
• ?????? Personal protective equipment
• ????? Handling and transportation
• ???? Medical treatment
• ??????????? Importance of pre-arrangement for
  medical treatment

3
????????? Fatality on acute HF exposure

• ????? Clothing not removed
• ?????? immersed in swimming pool
• 40????? 40min ambulance arrived
• ???? intensive care
• 7?????? 7 days right leg amputated
• 15???????-? 15 days multi-organ failure - die

4
???? PIN-HOLE CONTACT

• ???? washing empty container
• ???? pin-hole gloves
• ??????? second day burning finger
• ???? remove finger nail
• ???? medical injection

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????? HF characteristics

• ?? 4 ?? health 4 extreme poison
• ?? 4 ???? contact 4 extreme corrosive
• ?? 2 ?? reactivity 2 moderate
• ??? 0 flammability 0

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?? Properties

• ??/???? Colorless/fuming liquid
• ?? acrid odor
• ???1.0 (0.1 ?? ??) pH 1.0 (0.1M solution)
• ?????,? ,??,???,??,??,???incompatible NH3,
  NaOH, H2SO4, alkalis, organic, rubber, leather,
  water, glass..
• ???? Avoid moisture

7
???? Health hazard

• ???????Harmful not immediately apparent
• ?????????? Inhalation severely corrosive to
  respiratory system
• ???????,???????????????, ??8???????????-?????
• skin contact corrosive, serious skin burns
  not immediately apparent/painful, delay 8 hours
  or longer F ion readily penetrate skin - deep
  tissue and bone

8
???? Health hazard

• ?????? Eye contact corrosive
• ????gt6 ??/?- ???,??/????
• chronic exposure gt6gm/day - fluorosis,
  bone/joint damage
• ????????,????? ingestion corrosive digestive
  tract, kidney dysfunction
• ?????? aggravation existing conditions

9
?? First aid

• ????????? Detailed planned before work
• ?????????? inhalation immediate medical help
• ?? ???????? ingestion immediate medical help
• ???????,????.. ???????? skin wash long time,
  remove clothing, ..medical help
• ?? ????? .. ???????? eye wash long time
  ..medical help

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??????? Pre-arrange medical help

• ??/?????????
• Inform/prearrange possible incident
• ????/?? ready medicines/facilities
• ??/??????? information/MSDS
• ?????? note to physician

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????? Handling and storage

• ???PE?? Tightly closed PE container
• ??/???????? cool/dry place adequate ventilation
• ???? protect damage
• ??/?? containment/spill
• ???? /????? special materials/technology from
  supplier
• ??/???? observe/follow warning

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? ? Protection

• ???????? Use PPE
• ??/?????? Local preferred/general ventilation
• ?????? remove ignition source
• ?? - ???? spill - evacuate area
• ??- ????,???,?? treat - dry MgSO4, soda
  ash/slaked lime
• ?? - ???? collect - disposal
• ??/?? clean/neutralize

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????? Personal protection

• ????,???? Respiratory, correct type
• ??????,??,???, PVC??, ???? /??,?? skin
  protective clothing, boots/safety shoes, PVC
  gloves, chemical goggles/full face shield,
  coveralls.
• ????/?? Eye goggles/full face shield

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????? HF SAFETY

• ??,???,??? Poison, danger, corrosive
• ???????/?? extremely hazardous liquid/vapor
• ?????????/?? sever burn not immediate
  painful/visible
• ???????? fatal if swallowed or inhaled
• ????,??,???? burn skin, eyes, respiratory tract
• ?????? cause bone damage

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????? HF SAFETY

• ??????,??,?? Do not get in eyes, on skin, on
  clothing
• ?????? do not breath vapor
• ????? cool before opening
• ???? adequate ventilation
• ????? wash hand thoroughly
• ????????? store in tightly close container
• ???????? CALL MEDICAL HELP IMMEDIATELY

16
??? HF

• ????????? Strictly follow instruction/precaution
  
• ?????????? Always use PPE