Crashed Testo Vials Crystalized, which ester?

[don_fetto]

I’m trying to understand the ester based on crash/re-dissolution behavior.

I supposedly bought testosterone undecanoate 300 mg/mL from a source that has since been proven unreliable. Independent testing of other vials from the same source (same vial color, different label: “Test C 250”) showed it was actually Sustanon at ~178 mg/mL.

This TU-labeled vial crashes badly and only fully re-dissolves after ~10 minutes at ~90 °C (air fryer). That seems extreme. From a chemistry/solubility standpoint, would this behavior be more consistent with a Sustanon-type blend or another ester rather than true undecanoate?

I know this isn’t definitive without lab testing, but I’m interested in whether the dissolution characteristics alone make TU unlikely.

 

[Alert_Custard]

Very difficult to know. I assume it also depends on other factors like amount of solvent and type of oil. Plus individual variations on each vial.

I had some TU a while ago that I brewed myself. About 12 vials, all stored in the same place, brewed in the same batch, same day, and 1 crashed after like 6 months. No idea why.

 

[Photon]

I’m trying to understand the ester based on crash/re-dissolution behavior.

I supposedly bought testosterone undecanoate 300 mg/mL from a source that has since been proven unreliable. Independent testing of other vials from the same source (same vial color, different label: “Test C 250”) showed it was actually Sustanon at ~178 mg/mL.

This TU-labeled vial crashes badly and only fully re-dissolves after ~10 minutes at ~90 °C (air fryer). That seems extreme. From a chemistry/solubility standpoint, would this behavior be more consistent with a Sustanon-type blend or another ester rather than true undecanoate?

I know this isn’t definitive without lab testing, but I’m interested in whether the dissolution characteristics alone make TU unlikely.

You can't determine based off this.
The melting point depends on the amount of solvents used. This is the melting points of test without solvents. With solvents, you can get them all to hold in the freezer without crashing.

Requiring 90c to uncrash, however does seem to indicate its not TU.
It should melt at 60c.

 

[don_fetto]

thanks for the replies.

added two pics.

the carrier oil should be MCT

 

[Photon]

thanks for the replies.

added two pics.

the carrier oil should be MCT

You can ask around in the WWB thread if anyone has received those TU vials with green caps. There's some testing going around for china gear.

China vendor are all resellers (they don't brew), so you might have gotten the same product -- from a different vendor.

 

[Lokey]

You can ask around in the WWB thread if anyone has received those TU vials with green caps. There's some testing going around for china gear.

China vendor are all resellers (they don't brew), so you might have gotten the same product -- from a different vendor.

I have WWB Test U 300, it's hepius/stromusc branded though with black caps. It also crashes.

 

[don_fetto]

I have WWB Test U 300, it's hepius/stromusc branded though with black caps. It also crashes.

which temperatures does it re-dissolve?