Difference between revisions of "Wet Chemistry Safety"

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==Requesting New Chemicals==
==Personal Protective Equipment or PPE Overview==
*Always review the SAFETY DATA SHEET of the new chemical being requested before submitting a request.
*Submit the request through email to the KNI Lab Safety Officer - [mailto:bertm@caltech.edu Bert Mendoza]
*In the email request, include:  (1)SAFETY DATA SHEET, (2)PROCESS to be used with the new chemical and the (3)AMOUNT of chemical to be brought into the KNI Lab.
*The KNI Lab provides many chemicals for processing.  If the requested chemical will improve your process and can be valuable to other members, include the reasons in the request.  Staff may decide it would be beneficial to provide the new chemical for all members and add it to the '''[[Provided_Chemicals | Chemicals Provided by the KNI with typical SDS]]''' list.
*If the chemical is unique to your process, you will be required to supply the chemical and the chemical will be added to the'''[[Safety Data Sheets (SDS) | Approved Chemicals with typical SDS]]''' list.
*Do not bring in any chemicals into the KNI Lab before receiving a reply that your request has been approved.


==PPE Overview==
'''  PPE consists of:'''
 
'''  Personal Protective Equipment or "PPE" consists of:'''
*1)  Acid Resistant Apron (Green) - '''PUT ON FIRST, Remove Last'''
*1)  Acid Resistant Apron (Green) - '''PUT ON FIRST, Remove Last'''
*2)  Face Shield  - '''PUT ON SECOND, Remove Second'''
*2)  Face Shield  - '''PUT ON SECOND, Remove Second'''
*3)  Trionic E-194 Tripoly Acid Resistant Gloves - '''PUT ON LAST, Remove First'''
*3)  Trionic E-194 Tripoly Acid Resistant Gloves - '''PUT ON LAST, Remove First'''
''NOTE:''
''NOTE:''
*PPE must be worn when using the ACID, BASE, and HF wet benches.
*PPE must be worn when using the ACID, BASE, PLATING, and Hydrofluoric "HF" Acid wet benches.
*Inspect PPE before putting on the safety equipment.  Clean if dirty or replace if damaged.
*Inspect PPE before putting on the safety equipment.  Clean if dirty or replace if damaged.
*Always make sure your workspace and PPE is clean and dry before removing PPE.
*Always make sure your workspace and PPE is clean and dry before removing PPE.
*PPE is not allowed outside of the Wet Chemistry Room.  You must remove your PPE before exiting the room.


'''Acid Resistant Apron (Green)''' will have a protective flap with the word "INSIDE" written on it.  Make sure the word "INSIDE" goes up against your body.  Always tie the apron properly so the apron is protecting up to your neck.  After removing the apron, fold with the flap marked "INSIDE" is folded in and hang with the outsides facing each other.
'''Acid Resistant Apron (Green)''' will have a protective flap with the word "INSIDE" written on it.  Make sure the word "INSIDE" goes up against your body.  Always tie the apron properly so the apron is protecting up to your neck.  After removing the apron, fold with the flap marked "INSIDE" is folded in and hang with the outsides facing each other.
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==Hazardous Waste Handling and Labeling==
==Hazardous Waste Handling and Labeling==
 
* [https://caltech.box.com/s/ge2muxp4e90oxblrkysvvwb5mdu2r98p KNI Hazardous Waste Handling Video] - Demonstration specific to the KNI Wet Chemistry Room for Hazardous Waste Bottles, Washing Bottles, Filling out Tags, and Solid Waste Handling.
Refer to manual
* [https://caltech.box.com/s/tmqnu5x7ms6onfln2klzowazyrkvhqrh KNI User Handbook and Operation Procedures] - Provides a broad overview of the information needed specific to the KNI Cleanroom.
* [https://safety.caltech.edu/documents/13874/Chemical_Hygiene_Plan.pdf Caltech Chemical Hygiene Plan] - Provides a broad overview of the information needed for safely working with hazardous chemicals in the laboratory.
* [https://safety.caltech.edu/documents/16478/Hazardous_Waste_Management_Guide.pdf Caltech Hazardous Waste Management Guide] - Provides a broad overview of information on Hazardous Waste determination, handling and disposal requirements, etc.


==Decanting Chemicals==
==Decanting Chemicals==
* [https://caltech.box.com/s/kgxh5cmzbotufvlnbonldcurmz23xasz Watch the KNI Lab Standard Wet Chemistry Video]
* [https://caltech.box.com/s/kgxh5cmzbotufvlnbonldcurmz23xasz Watch the KNI Standard Wet Chemistry Video]
*Place a cleanroom wipe with '''Your NAME, DATE and CHEMICAL being used under the bowl or beaker.'''  If you are leaving your bowl or beaker over night, include the return date on the cleanroom wipe.  Make sure to label any bowls or beakers that contain WATER also.
*Place a cleanroom wipe with '''Your NAME, DATE and CHEMICAL being used under the bowl or beaker.'''  Make sure to label any bowls or beakers that contain WATER also.  '''If you are leaving your bowl or beaker over night, include the return date on the cleanroom wipe.  '''Email the safety officer when leaving any chemicals on the wet bench or hood.
*Always cover bowls or beakers when leaving them unattended.
*Always cover bowls or beakers when leaving them unattended.
*Never pour decanted chemicals back into the supply bottle.  Once the chemical has been decanted it is considered Hazardous Waste, this is to ensure there is no contamination of our supply chemicals.
*Never pour decanted chemicals back into the supply bottle.  Once the chemical has been decanted it is considered Hazardous Waste, this is to ensure there is no contamination of our supply chemicals.
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*'''Never leave your beaker unattended on the hot plate for ANY AMOUNT OF TIME.'''
*'''Never leave your beaker unattended on the hot plate for ANY AMOUNT OF TIME.'''
*'''Hydrofluoric Acid is NEVER allowed on the hot plates.'''
*'''Hydrofluoric Acid is NEVER allowed on the hot plates.'''
*Remover PG and Acetone are the only SOLVENTS allowed to be placed on the hot plate. '''Temperature must be maintained below 65°C.'''


==Buddy System==
==Buddy System==
 
* [https://caltech.box.com/s/jah0ieu5rwv73hfa2n06604195z7daqu KNI Buddy System SOP]
'''The  laboratory  is  open  to  qualified  users  both  day  and  night,  weekdays  and  weekends.''' Certain instruments and procedures may, however, be restricted to the normal work day, or only allowed in the presence of a staff member. In general, a“buddy” is another knowledgeable user within the facility who can and will watch out  for  you  in  case  of  trouble.  Laboratory  “buddies”  must  of  necessity  communicate with each other to be effective. The use of chemicals in particular is restricted  to  the  buddy  system  after  normal  hours,  i.e.  all  time  outside  8  a.m.-5 p.m. normal workdays.   
'''The  laboratory  is  open  to  qualified  users  both  day  and  night,  weekdays  and  weekends.''' Certain instruments and procedures may, however, be restricted to the normal work day, or only allowed in the presence of a staff member. In general, a“buddy” is another knowledgeable user within the facility who can and will watch out  for  you  in  case  of  trouble.  Laboratory  “buddies”  must  of  necessity  communicate with each other to be effective. The use of chemicals in particular is restricted  to  the  buddy  system  after  normal  hours,  i.e.  all  time  outside  8  a.m.-5 p.m. normal workdays.   


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==Other Best Practices==
==Other Best Practices==
* [https://caltech.box.com/s/n3kyhalo3dzzq789a1jq1opx067ltk8a Watch the KNI Cleanroom Entry Procedure Video]
* [https://caltech.box.com/s/9lagfno1jygz50ero736ghdww4tm1q4s Watch the KNI Cleanroom Exit Procedure Video]
* [https://caltech.box.com/s/uibrofwb894uowfmwgzcenpewzjbxe8l Watch the KNI Filling Handheld LN2 Dewars Video]
* [https://caltech.box.com/s/0yojdjdi2yp8hlld0qbd9sbegr1fvngk Watch the KNI Opening Cleanroom Gloves Video]

Latest revision as of 21:36, 25 August 2022

Personal Protective Equipment or PPE Overview

PPE consists of:

  • 1) Acid Resistant Apron (Green) - PUT ON FIRST, Remove Last
  • 2) Face Shield - PUT ON SECOND, Remove Second
  • 3) Trionic E-194 Tripoly Acid Resistant Gloves - PUT ON LAST, Remove First

NOTE:

  • PPE must be worn when using the ACID, BASE, PLATING, and Hydrofluoric "HF" Acid wet benches.
  • Inspect PPE before putting on the safety equipment. Clean if dirty or replace if damaged.
  • Always make sure your workspace and PPE is clean and dry before removing PPE.
  • PPE is not allowed outside of the Wet Chemistry Room. You must remove your PPE before exiting the room.

Acid Resistant Apron (Green) will have a protective flap with the word "INSIDE" written on it. Make sure the word "INSIDE" goes up against your body. Always tie the apron properly so the apron is protecting up to your neck. After removing the apron, fold with the flap marked "INSIDE" is folded in and hang with the outsides facing each other.

Face Shield - always clean the inside of the face shield with IPA and clean room wipe. Adjust the face shield so the shield is secure around your forehead with the knob on the back of the forehead strap. Make sure the face shield does not move from your forehead when looking down. Adjust the shield so you have some room for ventilation and the shield does not move freely using the knobs on each side of the shield.

Trionic E-194 Tripoly Acid Resistant Gloves - always inspect your gloves for damage or cracking due to age before using your gloves. Replace with new gloves if any damage or aging is seen. Write your NAME and DATE on both cuffs when replacing or getting a new pair of Acid Gloves. Store your Acid Gloves over the ACID, BASE or HF bench. Acid Gloves will be disposed if damage is seen or through regular inspection of date (Acid Gloves may be disposed after two week of use).

Hazardous Waste Handling and Labeling

Decanting Chemicals

  • Watch the KNI Standard Wet Chemistry Video
  • Place a cleanroom wipe with Your NAME, DATE and CHEMICAL being used under the bowl or beaker. Make sure to label any bowls or beakers that contain WATER also. If you are leaving your bowl or beaker over night, include the return date on the cleanroom wipe. Email the safety officer when leaving any chemicals on the wet bench or hood.
  • Always cover bowls or beakers when leaving them unattended.
  • Never pour decanted chemicals back into the supply bottle. Once the chemical has been decanted it is considered Hazardous Waste, this is to ensure there is no contamination of our supply chemicals.
  • Make sure the area is clean and dry when finished processing.

Hot Plate Rules

  • When using hot plates, check that your beaker is both suitable for hot plate use and smaller than the area of the hot plate.
  • Never use a Teflon or plastic beaker on a hot plate.
  • Always monitor the temperature of the chemicals on a hot plate with the appropriate thermometer.
  • Never leave your beaker unattended on the hot plate for ANY AMOUNT OF TIME.
  • Hydrofluoric Acid is NEVER allowed on the hot plates.
  • Remover PG and Acetone are the only SOLVENTS allowed to be placed on the hot plate. Temperature must be maintained below 65°C.

Buddy System

The laboratory is open to qualified users both day and night, weekdays and weekends. Certain instruments and procedures may, however, be restricted to the normal work day, or only allowed in the presence of a staff member. In general, a“buddy” is another knowledgeable user within the facility who can and will watch out for you in case of trouble. Laboratory “buddies” must of necessity communicate with each other to be effective. The use of chemicals in particular is restricted to the buddy system after normal hours, i.e. all time outside 8 a.m.-5 p.m. normal workdays.

You may not wet etch, mix chemicals, or dispose of waste without another user in the area. A “visitor” is not considered a knowledgeable user for the purpose of the “buddy” system. The buddy system particularly applies to all wet chemical use during off hours. Additional procedures may apply to specific instruments. You will be advised of these when you are trained on each instrument.

Each piece of equipment will have a training requirement before a user is permitted to use it without supervision. A probationary period of operation, consisting of a minimum of fifteen (15) hours of daytime use without user-caused problems, will then be required before the user will be allowed to operate the equipment off-hours. If a user-caused incident occurs after that, the individual will need to obtain additional training (amount at the discretion of the KNI staff) and repeat the probation on the equipment during daytime hours M-F to re-gain the off-hour privileges.

Secondary Containment

  • Always place ANY chemical stored in GLASS into a red rubber bucket to transfer the chemical from the storage area to the work station.
  • Always use the red rubber bucket to transfer any ACIDS or BASES from the storage area to the work station.
  • Never place any chemical bottles directly onto the floor. Use the red rubber bucket to store the chemical on the floor next to the station when in use. Always return the chemical back to the proper storage area when finished using the chemical.
  • Make sure bottle is clean and dry before placing the bottle into a red rubber bucket or the Satellite Accumulation Area container. This is especially true when removing a hazardous waste bottle from the sinks.

Other Best Practices