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ProfessorGAC

(76,846 posts)
6. Very, Very Dangerous
Mon Aug 16, 2021, 04:22 PM
Aug 2021

The IDLH (Immediately Dangerous To Life & Health) level is 100ppm.
Levels up to 50ppm can be managed for 6-8 hours with a yellow labeled respirator, but 100ppm or higher requires SCBA.
I've done some lab work with it in small cylinders. (Don't recall for sure, but maybe 100g quantities.)
It not only was only used in a hood, but it was STORED in a hood, with a scrubber & no off switch on the blower.
Nothing to be taken lightly.

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