Some kind of CHEMICAL leaking
in your lab.
Breaking Bad Season 3, Episode 13
"The lab’s CHEMICAL report revels
that those products were used"
Money Heist Season 1, Episode 8
WALT:
We used a different CHEMICAL
process, but it is every bit as pure.
Breaking Bad Season 2, Episode 1
Chemical bonds are what
make matter matter.
Breaking Bad Season 2, Episode 7
...and woke up with second degree
CHEMICAL burns on my face.
The Big Bang Theory Season 6, Episode 1