Mocon Concentrate - Update after one year in the freezer

[bnxvs]

You can easily get the SO2 adduct in triethanolamine by conventional bubbling. But for this, it will be necessary to dilute TEA with some volatile solvent (toluene, acetone ...?), Since the viscosity of TEA greatly complicates the process. A source of SO2 can be, for example, metabisulfite heated to 150 C.
Naturally, DEA in this sense would be more interesting than TEA. But it's harder to get.
p.s. But I don't see a significant need to create an anhydrous composition. The modern HC-110 also now contains a concentrated aqueous solution of potassium sulfite. It will be obtained much easier (by heating potassium metabisulfite, or by reacting it with potassium hydroxide). In my humble opinion, this should not significantly affect the shelf life. However, there may be difficulties with freezing the concentrate - the precipitation of a crystalline precipitate.

 

[grainyvision]

You can easily get the SO2 adduct in triethanolamine by conventional bubbling. But for this, it will be necessary to dilute TEA with some volatile solvent (toluene, acetone ...?), Since the viscosity of TEA greatly complicates the process. A source of SO2 can be, for example, metabisulfite heated to 150 C.
Naturally, DEA in this sense would be more interesting than TEA. But it's harder to get.
p.s. But I don't see a significant need to create an anhydrous composition. The modern HC-110 also now contains a concentrated aqueous solution of potassium sulfite. It will be obtained much easier (by heating potassium metabisulfite, or by reacting it with potassium hydroxide). In my humble opinion, this should not significantly affect the shelf life. However, there may be difficulties with freezing the concentrate - the precipitation of a crystalline precipitate.

Given the number of HC-110 clones that have come nowhere near the shelf life of the original, I highly doubt that an aqueous formula will naturally give such long shelf life with the agents used. Rodinal is one of the few that works but that's because of the developing agent being exceptionally stable.

also for TEA bubbling... yea you would definitely not do this without suitable safety gear. Definitely not inside without a fume hood and likely still with a mask and proper filtration along with eye and arm protection. Regardless, for the viscosity issue, wouldn't heated TEA be thin enough to work here?

 

[bnxvs]

If you fear wolves, don't enter the forest. )))