T-grain;

Many companies today use Phenol in their emulsions. When you open a fresh bag of Ilford paper, the odor hits you right off. It is also used in the subbing on Baryta and RC papers IIRC. Kodak used several natural products in theirs, but now uses a complex mix of heterocyclic compounds that cannot be easily obtained without a special license.

The ones listed in your post 107 are not in common use. The last chemical on that list appears to be misspelled. Is that correct?

No bacteriostat is benign.

I am considering Chloramphenicol as a possible bacteriostat. It is cheap and can be made available. I have to test its photographic effects.

PE