Hello, I think this group is applicable. I am looking for a standard or source of TML (Tetramethyl lead). Any leaded gasoline source from the archives so to speak would be sufficient. I really can't find a thing. TEL (tetraethyl lead) is an easier buy but I'd like at least to find this other alkyl-lead compounds. I wouldn't mind having all the alkyl leads found in certain mixes of leaded gasoline but TML is my higher priority right now. I would even be willing to purchase a few mL of someone's old supply of leaded gasoline if they have any.