There is a difference between pure Tamoxifen base powder and Tamoxifen citrate powder. It is as has been noted above; Tamoxifen + citrate acid added.
The CAS number (chemical identifier) for
Tamoxifen base is 10540-29-1 and the molecular weight (MW) is 371.5.
The CAS number (chemical identifier) for
Tamoxifen citrate is 54965-24-1 and the molecular weight (MW) is 563.7. This is how you can distinguish between the two of them. Many suppliers list the difference but whether or not you can trust the label is another thing to consider.
As far as I know, most if not all RC Tamoxifen is in Citrate form. It is most readily available from China and like places. Many RC companies list the type they sell (as identified by CAS #).
A Rx tablet of Nolvadex contains 10mg of Tamoxifen base and ~ 5mg of Citrate for a total of ~ 15mg. It is listed as 10mg of active ingredient. RC companies that buy Tamox Citrate powder to make liquid "Nolva" should be accounting for the difference and adding 15mg of Tamox citrate powder into the liquid suspension (per serving size), as opposed to 10mg of Tamoxifen base. Whether or not they do that is another story. Having said that, I wouldn't worry about it too much and would definitely just stick to the usual dosing protocol for RC SERM's. Most are probably underdosed anyway.
The only way to truly know that you are getting the full amount of active ingredient is to get a prescription and buy it from a legit pharmacy. People who use Rx AI's and SERM's can speak to the potency difference.
And for those wondering, Nolvadex is the original brand name of Tamoxifen Citrate pills.
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