Using Hydrofluoric Acid to Etch Oxide Layers

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In this video I evaluate three easy-to-obtain sources for low-concentration Hydrofluoric Acid (HF) and use them to etch Silicon Dioxide layers. I also go over the dangers of Hydrofluoric Acid and the differences between it and other acids, such as Sulfuric Acid.

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Affiliate Links to Chemicals & Tools (I earn small commissions on these links):

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Acid Vapor Respirator Cartridge: https://amzn.to/3sYm31n
Whink Rust Remover: https://amzn.to/3rf9RZq
Armour Etch: https://amzn.to/48hoqfE
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Links to Sources:

SDS Pages:
2% HF SDS: https://www.riccachemical.com/Website...
10% HF SDS: https://www.riccachemical.com/Website...
50% HF SDS: https://www.riccachemical.com/Website...
Sulferic Acid SDS: https://www.riccachemical.com/Website...
Whink Rust Remover SDS:https://web.faa.illinois.edu/app/uplo...
Porcelain Etch SDS: https://www.pulpdent.com/wp-content/u...
Armour Etch SDS: https://www.richelieu.com/documents/d...

Other Info:
SDS Toxicity Categories: https://www.ilo.org/static/english/pr...
Vapor Pressure: https://www.physics.purdue.edu/primel...
Toxicity: https://www.ncbi.nlm.nih.gov/pmc/arti...
Toxicity: https://ehs.stanford.edu/reference/in....
Toxicity: https://www.cdc.gov/niosh/ershdb/emer...
Dermal: https://www.sciencedirect.com/science...
Chemical Compatibility: https://www.graco.com/content/dam/gra...
Chemical Compatibility: https://at.vwr.com/assetsvc/asset/de_...
Toxicity: https://www.ncbi.nlm.nih.gov/pmc/arti....
Toxicity: https://ehs.unc.edu/wp-content/upload...
Accident List: https://www.osha.gov/ords/imis/Accide...