Letrozole 2.5mg Tablets | 100-Count | Letrozole | AI

QSC Letrozole (Letrozole (non-steroidal aromatase inhibitor)) — ≥99% HPLC purity, MS confirmed, Janoshik COA. Research use only.

✓ 99%+ Purity ✓ COA Available
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$130

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SKU: QSC-LETRAZOLE-2-5MG-100TAB
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QSC RESEARCH GRADE

≥99% HPLC PurityMS ConfirmedJanoshik COAIn-House SPPS5-Region Domestic Shipping

What is Letrozole?

Letrozole is a third-generation non-steroidal aromatase inhibitor (Type II — reversible competitive CYP19A1 inhibition). ~99% estrogen suppression — most potent AI. Research: estrogen-sensitive cancer, T:E2 ratio manipulation, aromatase kinetics, male hypogonadism from aromatase excess, and Type I vs Type II AI comparison. CAS 112809-51-5.

Research Applications

Aromatase Inhibition

Reversible CYP19A1 competitive inhibition — ~99% estrogen suppression

Hormone-Sensitive Cancer

ER+ breast cancer estrogen deprivation models

T:E2 Ratio Manipulation

Testosterone/estradiol ratio titration in male models

AI Class Comparison

Non-steroidal (reversible) vs steroidal/irreversible AI mechanisms

Male Hypogonadism

Aromatase excess syndrome — estrogen-driven gonadotropin suppression

Quick Specs

Form Tablet — 2.5mg per tablet, 100-tablet bottle
CAS Number 112809-51-5
Molecular Formula C₁₇H₁₁N₅
Molecular Weight 285.3 g/mol
Compound Type SERM / Aromatase Inhibitor
Purity ≥99% by HPLC — every batch
Identity MS molecular weight confirmed — every batch
COA Janoshik-independent, publicly verifiable
Manufacture In-house synthesis — Qingdao, China
Storage Room temperature sealed | cool, dry storage
Shelf Life 24 months unopened

Certificate of Analysis (COA)

For the latest Certificate of Analysis (COA), please email us with your request.
🧪 Peptide Research Tools: Use QSC’s free peptide calculators — reconstitution, BAC water, dosing, half-life, and mixing charts.
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Source: PubMed / NCBI  ·  Last 10 years  ·  Refreshed every 24 hours  ·  For research reference only — not clinical guidance.

⚠️ RESEARCH USE ONLY — NOT FOR HUMAN CONSUMPTION

QSC products are strictly for in vitro and in vivo laboratory research. Not intended for diagnostic, therapeutic, or personal use.

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Research Use Disclaimer

All QSC products are strictly for laboratory, scientific, and research use only. They are not for human consumption, medical treatment, diagnosis, or disease prevention.

By purchasing or using QSC products, you confirm:

  • You are a qualified researcher or acting under the supervision of one.
  • Products will only be used for legitimate research purposes.
  • Products are not evaluated by the FDA or any regulatory authority for human use.
  • You assume all responsibility for legal compliance, proper handling, and storage.
  • You meet the legal age requirement in your jurisdiction.
No Warranty: Products are sold “as is,” with no express or implied warranties regarding efficacy, safety, or suitability. Results in research may vary. QSC is not responsible for outcomes, interpretations, or conclusions drawn from any studies conducted using these products.
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General Safety & Handling

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Not for Human Use

These compounds are for research only. Any off-label, personal, or clinical use is strictly outside the intended scope of supply.

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PPE Required

Always use appropriate personal protective equipment (gloves, lab coat, eye protection) when handling peptides.

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Storage Compliance

Follow product-specific storage conditions to maintain identity, purity, and biological activity.

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Proper Disposal

Dispose of all materials in accordance with institutional biosafety, chemical waste, and hazardous material protocols.

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Verify Quality

Janoshik COAs are available on every product page. Verify batch identity (MS confirmed) and purity (≥99% HPLC) before use.

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Peptide Storage Guidelines

🌑 Light-protected💧 Low moisture🌡️ Stable temperature🔬 Sterile handling

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