HGH 191AA

4.7 · 33 reviews

Vial size

$80.00USD · per vial

In stock, dispatched within 24 hours of payment

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✓ ≥99% purity, verified by HPLC and mass spectrometry
✓ Third-Party Tested · COA Available
✓ Fast & Secure Local and Global Shipping

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For research use only. Not for human or veterinary use; not a drug, food or cosmetic. Sold to qualified researchers.

What is HGH 191AA?

HGH 191AA is recombinant somatropin, the full 191-amino-acid sequence of human growth hormone with its two disulfide bonds. It is studied as the native ligand of the growth hormone receptor, upstream of IGF-1 in the somatotropic axis. We supply it lyophilised, assayed per lot by HPLC against a reference standard to ≥99% purity, with the certificate published against the lot number on the vial. Research use only.

Specifications

Product: HGH 191AA
Form: Lyophilised
Available strengths: 10 IU / 15 IU / 24 IU / 36 IU
Purity (HPLC): ≥ 99.0%
Testing: Independent third-party laboratory
Assay: HPLC + MS
Batch documentation: Batch-specific certificate of analysis
Storage: 2–8 °C
CAS number: 12629-01-5
Molecular formula: C990H1528N262O300S7
Molecular weight: 22124.77 g/mol
Amino acid count: 191
Intended use: Research use only

Certificate of analysis

Every lot is assayed on its own.

Each batch of HGH 191AA is assayed by an independent laboratory before release: HPLC against a reference standard, for identity, purity and content. Nothing ships against another run's paperwork.

Most recent assayed lot99.79%

Vial tested: 15 IU
Lot: ENC-HGH-2608
Purity (HPLC): 99.79%
Identity (HPLC): Pass, matches reference
Content: 20.65 IU

Lots rotate as stock moves, so the batch you receive may not be the one shown here. Each is assayed and released on its own result.

Researcher reviews

4.7 · 33 reviews

12 Apr 2026

“Paid in crypto, got the discount, shipped fast. Smooth process.”

✓ P. R. · verified

02 Jun 2026

“Consistent quality across two batches now.”

✓ Lab procurement · verified

21 Mar 2026

“Asked questions over chat before ordering, quick, knowledgeable replies.”

✓ J. W. · verified

Complete your research setup

HGH 191AA plus the supplies researchers order with it. One click adds the full set to your cart.

≥99% HPLC

Supplies & Accessories

Bacteriostatic WaterUS Lab Tested

0.9% benzyl alcohol · for reconstitution

$14.00per vial

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Ordering questions

Can I see the COA before ordering?

Yes. The assay record for the current lot is published on this page: lot number, purity, content, methods, laboratory and test date. The How We Test page explains what each figure means.

How is each batch tested?

Every production lot is assayed at an independent laboratory: reverse-phase HPLC for purity and mass spectrometry for identity. The result is recorded against the lot number printed on the vial, so the vial in your hand traces to a specific assay.

Do you ship internationally, and is there local delivery?

We ship worldwide with tracked delivery from regional hubs. In several cities this product is also held in local stock with same-day delivery; the delivery section above shows which.

What is the legal and research-use status?

Everything in the catalogue is supplied strictly as a research chemical for laboratory use by qualified researchers. Nothing is sold for human or veterinary use, and every order is placed under the research-use terms.

What supplies do I need alongside it?

Lyophilised peptides are reconstituted with bacteriostatic water, stocked in the same catalogue along with sterile supplies. The dilution calculator on this site does the concentration arithmetic for you.

More questions, answered in the Peptide Library