UDNF User Mixed Solutions

Last Updated: 11/16/2022

General Guidelines

  • Read each chemical’s SDS before using it.
  • Always wear the required personal protective equipment (PPE) when working with chemicals.
  • Please treat all chemicals with respect.
  • Handle chemicals with care.
  • Always add acid to water (“put the king into the water, not the water into the king”).

Requesting Approval for New Chemical Mixtures

  • If the mixture you would like to use is not listed below, please provide the Director with details.
  • If any of the mixture’s components is not on the list of approved chemicals, please provide the appropriate SDS(s) with your request.
  • Depending on the mixture, UDNF may need to consult with EHS or peer facilities.
  • Please place the request in advance of the intended use date: allow 2-3 weeks for your request to be processed and the appropriate operating procedures to be developed.
  • Please feel free to inquire about the status of your request.
  • Some mixtures may be deemed too hazardous and may not be approved.
  • Please do NOT order any chemical(s) without written permission from the Director.





Approved User Mixed Solutions



Components Mixing Ratios
49%HF:H2O 1:3
49%HF:H2O 2:98
49%HF:H2O 1:99
49%HF:Methanol 1:10
Citric Acid:H2O2 2:1
Citric Acid:H3PO4:H2O2:H2O 1:1:1:10
H2SO4:H2O2:H2O 1:8:80
H2SO4:H2O2:H2O 1:8:800
H3PO4:H2O2:H2O 1:1:30
H3PO4:H2O2:H2O 6:2:80
HCl:H2O any:any
HCl:H3PO4 1:8
HCl:H3PO4:H2O 1:1:1
HNO3:H2O any:any
NH4OH:H2O2:H2O 1:4:20
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