GTS-21 HCL Powder – 5g

What makes Chemyo special

Triple tested before release. 1,000+ samples independently tested across identity, purity, and concentration.

Identity • Purity • Concentration

Compound Identity Verified

HPLC spectral matching and FTIR confirm the compound matches the expected reference.

99%+ Purity Standard

Each material is assayed by HPLC and must meet Chemyo’s 99%+ purity standard.

Label Claim Verified

Finished solutions are assayed by HPLC to confirm the labeled mg/ml.

Only after all applicable QC checks pass is the batch released.

What makes Chemyo’s
customers feel so excited

Rated 5 out of 5 based on 1 customer rating

These guys know how to do online business. Best customer service. Excellent packaging. Quick Shipping! Quality Product!

HERNAN LIM

Verified Buyer
Rated 5 out of 5 based on 1 customer rating

Also zero complaints. 3rd order through Chemyo and everything is top notch. Solutions are great, but this will be the first time researching raw powder. The powder weighed out to 1.006G, so spot on.

Jay Crim

Verified Buyer
Rated 5 out of 5 based on 1 customer rating

The double-bagged, light-blocking product packaging is consistently convenient for long-term storage and identification.

Aaron

Verified Buyer
Rated 5 out of 5 based on 1 customer rating

High Quality. This is the only SARM research company I trust.

joshua.m.herter

Verified Buyer
Rated 5 out of 5 based on 1 customer rating

Chemyo ships fast and the quality of their products are all top notch. Always a pleasant experience with them as a customer for 2+ years now consistently.

Alexander K.

Verified Buyer
Rated 5 out of 5 based on 1 customer rating

Great price and fast shipping. Lab supplies that work.

Dennis

Verified Buyer

How we compare

		Market Standard
Lab Reports
3rd party tested for Identity Purity Concentration
50ml Volume
Induction Sealed
Batch Traceability

Frequently asked
questions

Identity, purity, and concentration cannot be confirmed by appearance. They must be verified through analytical testing. Every released Chemyo batch is tested by independent laboratories before it is offered for sale. All products must pass identity and purity testing, and for solution products the finished liquid is also tested to confirm the actual mg/mL against the label claim. A batch that does not meet the release criteria is not sold.

Every released batch must have confirmed compound identity and raw material purity of 99% or higher. For solution products, the finished liquid must also test within 10% of the labeled mg/mL. A batch that fails any required checkpoint is not released. The full process is documented at chemyo.com/testing.

Raw material testing confirms the compound is correct and highly pure before production begins. For a solution, that alone does not confirm the concentration inside the bottle. So finished bottles are tested by an independent laboratory using HPLC to verify the final mg/mL, not only the starting material.

Testing a single bottle only confirms that one unit. To confirm the entire batch was mixed and filled consistently, our third-party fulfillment center randomly selects multiple finished bottles from the same inventory that ships to customers and sends them for independent HPLC concentration testing. The number of samples scales with batch size, and all must meet specification before the batch is released.

In practice, no. Our release process only permits a batch to ship once it has met the same standard: 99% or higher raw material purity and, for solution products, concentration within 10% of the label claim. Because every batch in circulation has cleared that identical bar, the batch you receive does not change the content or the quality.

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GTS-21 HCL Powder – 5g