PPL has it last time I checkedThanks for this ChemHead, i've just contacted my Alibaba contact and they have confirmed that DHT is in their 'doping list' and therefore they don't sell it. They mention that under normal circumstances, the import of these hormone products requires an import qualification certificate. The Alibaba contact then asked another supplier and they also said that if you don't have the certificate they wont provide it. I might still try though .. I think going on Bodybuilding forums is a good idea to locate a reasonably priced source.
Regarding dosage and delivery mechanisms, I reckon i'd go for the transdermal mechanism. What i'm worried about most here is having dry clean skin throughout the day for transdermal application. I'm sure I don't need to emphasise that the scrotum and penile tissue can become sweaty throughout the day, could this impede the movement of any applicants through it? I'm currently using Pansterone and Androsterone transdermally on scrotal tissue, it seems manageable if a small number of drops are used.
Presuming 25-50mg of DHT are to be applied each day with a transdermal delivery efficiency of 30-40% then use of between 65-130mg per day would need to be used. Assuming a dosage split of 4 times per day we're left with between 16 - 33mg per dose. From here, how much is dosed per drop depends on the size of the dropper and the concentration of the solution.
Caveat: This math is likely wrong, I've just gone on intuition and what I can find on google - I work with computer networks not chemicals . Anyone who can verify would be greatly appreciated.
For a 10ml dropper bottle producing drops of average size 0.05ml you'd get roughly 200 drops (not every drop is the same size). Therefore to get 16mg per drop you'd want 3.2g per bottle (200*16mg), and for 33mg per drop you'd want 6.6g per bottle (200*33mg). The problem here is DHT has a solubility in pure DMSO of 50-58mg/mL (differs depending on the site you go on).
The way i'm understanding this is, for each millilitre of DMSO used, it can dissolve 58mg of DHT. Considering our 10ml dropper bottle example above, this means that 10ml (of pure DMSO) can only dissolve 580mg of DHT which means each drop would contain 2.9mg of DHT meaning you'd need 12 drops 4 times a day for a 33mg dose, and 6 drops for 16mg per dose. The only feasible option here is the 16mg option.
Thing is, I've been dissolving Enzalutamide in DMSO for a while now, specifically, 2.5g in 10ml and yet its got a solubility in DMSO of 92mg/ml so surely it should only manage to dissolve 920mg not 2500mg - really need an explanation on this as it doesn't make sense at all.
Anyways, progressing with this track of thought, it seems as though we need a better solvent as we can't get the required concentrations from a dropper bottle using DMSO. This seems unlikely as everyone and their mum uses DMSO as a solvent but it doesn't seem feasible if we're looking to dose 25-50mg transdermally via DMSO at a DHT solubility of 58 mg/ml.