This ain't no alchemy lab that's for sure.
The Testing Equipment can be found in the Apothecarium of Undercity.[47.7, 73.1]
Quests[]
- From the red mixture
[52] Testing for Corruption - Felwood 
- From the green mixture [52] Testing for Impurities - Un'Goro Crater
Quotes[]
- Gossip
The liquids and mixtures all bubble and spasm as you approach. Next to the equipment lies a large pair of tongs that look as though they would be adequate for dropping in samples of ooze.
There is safety gear present, but it appears to be dusty and well-ignored.
You don't think touching anything would be wise.