Personal Protective Equipment (PPE), sometimes aka Personal Protective Apparel (PPA).

Mostly this page is about decapsulation

TLDR:

Ideally use a fume hood
H2SO4 will put out less corrosive fumes at decap temperatures, although it will smell really bad (and could have long term health risks)
HNO3 puts off NO2. Minimize release by working at lower temperatures, covering, and venting gas
Consider using a respirator

Respirator

McMaster likes the 3M 7800S full faceplate respirator. If you don't use a full faceplate respirator, you should also use a face shield or safety glasses.

Tips:

They came in different sizes, such as 7800S-L (large)
For longest life, store opened cartridges in a plastic bag (absorbs CO2 from atmosphere)
Replace periodically or sooner if you smell fumes
- Consider dating when you open them
Filters reduce concentration of acid gases, but does not eliminate them
- Will not provide adequate protection against dense acid gas
- ie don't stick your head over something spewing red gas
- FWIW you can get an oxygen tank for these
- Acid gases will still burn skin when concentrated
Face shield replacement: I found its less expensive to buy a new unit surplus than it is to replace the face shield
I (mcmaster) only use filters that protect against acid gases and particulates since I do mixed work
Uses P100 filters
- Evidently there is a standard that P100 filters are pink. So if its not pink, it probably won't fit
Following are listed as P100 acid gas w/ particulate filter
- 60922 Cartridge/Filter, Acid Gas/P100
- 60923 Cartridge/Filter, Organic Vapor/Acid Gas/P100
  - 3M 60923HB1-C
  - These might be lowest cost surplus
- 60926 Cartridge/Filter, Multi-Gas/Vapor/P100
  - IIRC I (mcmaster) typically use these
- 60928 Cartridge/Filter, Organic Vapor/Acid Gas/P100
  - “As recommended by the California Department of Pesticide Regulation No. 01-009-Methyl Bromide Field Fumigation”
- OSH sells these, although I tend to buy them surplus online
- 2017: usually $10-15 surplus, $20-25 new