Cayman Chemical Review: Testing & Evidence Score

Manufacturer / brand review

Cayman provides a public RGDS peptide certificate with multiple orthogonal identity methods.

Inspected sample results

RGDS peptide, item 15359, batch 0675573: HPLC purity 97.9% against a ≥95% specification; MS MH+ 434.4; IR and NMR conform; TLC purity 100%. Expiration date 15 November 2028. No analytical date or measured peptide content is stated.

Testing methods and purification

The RGDS certificate contains HPLC, MS, IR, NMR and TLC results with a batch identifier and expiry date. It is an in-house supplier certificate.

How often is testing performed?

One identifiable lot certificate was inspected. Expiration in 2028 is not an analysis date or proof of a scheduled retest programme.

What remains unverified

No quantitative peptide content, endotoxin, sterility, solvent or metal results in this example. TLC purity is not a universal mass-purity result.

Catalogue snapshot

Research reagent catalogue

Examples from the linked source, not a complete or real-time stock list. Institutional entries describe service categories. Shipping to Cyprus is not verified.

Why this score?

Points reward evidence maturity, not measured product purity. Claim-only points are limited; unknown criteria remain zero. Full rules are available in Research guides Business decision guides our methodology.

Purity & identityA sample result with purity/identity data was inspected.10/20

Independent laboratoryNo inspected external-laboratory report earns credit; in-house QC is not independent testing.0/20

Contaminant controlsNo qualifying, product-specific contaminant result inspected. Optional capabilities do not earn result points.0/30

Quantity & traceability5/20: identifiable lot with a dated document (5); no measured peptide-content result earns quantity credit (0). A print or expiry date does not establish analysis timing.5/20

AccountabilityPublic business/contact and product-use context; no independent audit of the operator.5/10

Verification limits

Lab attribution: Cayman Chemical in-house certificate. A laboratory-hosted record, where explicitly identified, was inspected on the lab’s portal. No direct staff confirmation, blind purchase, independent sampling or full current-batch audit was performed by Peptide.cy. Absence of a recorded test is not proof of contamination.

Public claims about purification cost, manufacturing location or certifications are not treated as proof of a clean final product. An authenticated COA would still apply only to its identified sample.

Follow the evidence

Sources accessed 10 September 2026. Vendor claims and vendor-hosted reports are identified as such.

COMMUNITY, WITH CONTEXT

Cayman Chemical customer reviews & ratings

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