Since when is Tordon OTC? That stuff is real, please be careful. Only mix what you are going to use within twelve hours. This stuff has a degenerative effect o-rings and seals. Same goes for any herbicide in a non-polar base, including roundup. It's a federal offense to transport Tordon in a container in which is was not originally packaged, fyi. Tordon is dangerous, not just to you, just about everything else on the planet, especially fish, birds and amphibians.
You are obviously inexperienced with Tordon, and probably most other herbicides as well.
Tordon RTU means Ready To Use. It requires no mixing, so Not mixing more than you intend to use is not an option. It is water soluble and has no deleterious effect on o-rings or any other equipment. In fact, unlike some herbicides that form an emulsion, it has no petro-chemical base that might even penetrate some varieties of PPE, so it is safer (as a solvent) than many herbicides.
Non-polar base? Horse ####! You don't know what you are talking about. Non-polar is freshman chemistry terminology for "doesn't mix with water". Since all the herbicides in your post DO mix with water, it illustrates that you are out of your league.
It's a federal offense to transport Tordon in a container in which is was not originally packaged. Again, this is nonsense. All herbicides are regulated by federal rules, which do include certain restrictions against storing them without their labels. As a regular transporter of Tordon, I can assure you that there are no regulations that say you can't transfer the herbicide to a different container. If you take the time to read the product label I posted above, you will even see specific instructions that mandate mechanical transfer to "other containers" when using any "originally packaged in" container larger than 5 gallons. Furthermore, I don't think you can buy Tordon RTU in anything bigger than a 2.5 gal jug.
Tordon is dangerous, not just to you, ... Again, a gross misrepresentation of the facts. I posted the product label above. The signal precautionary word used is "caution", NOT "danger". These all have specific meaning to someone that is licensed to handle these products. [yes, I can tell you don't have a license to apply herbicides] "Caution" is the most mild and least restrictive of precaution words that the Federal Government applies to any herbicide. It means that you are NOT REQUIRED to use any of the more advanced Personal Protection Equipment that other DANGEROUS chemicals do; such as safety glasses, rubber boots, full coverage aprons, respirator, or even more extreme equipment like full exposure protection suits. In fact, Tordon poses a very slight risk to humans, at least on a single exposure basis.
You anti-herbicide people really bother me. It's ok in my mind to oppose something from a well informed perspective. To disseminate lies and misinformation is just wrong.