Every lot has its own COA — HPLC purity + MS identityMinimum 1 kit (10 vials) per SKUQuotes in USD · other currencies on request
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Illustrative packaging. Supplied materials and packaging vary by order.

Cognition & sleep · Research peptides

P21 (P021)

P21 (P021): a peptidomimetic built on the tetrapeptide Asp-Gly-Gly-Leu from a region of ciliary neurotrophic factor (CNTF), capped with adamantyl-glycine; lyophilized powder.

  • Every lot ships with its COA — HPLC purity + MS identity
  • Purity specification ≥ 99.0%
  • From 1 kit (10 vials) per SKU
  • Written quote by email or WhatsApp

Specification

$515.20 / kit of 10 vials

$51.52 per vial · line total $515.20

kit · 10 vials

Need another spec, a larger fill or custom labelling?

Reference prices · P21 (P021) 5 mg
Kits on your quote listPrice / kit
Retail · 1–4 kits$515.20
Wholesale · 5–19 kits (−20%)$412.16
20+ kitsAsk for a quote

Kits count across your whole quote list, so different products add up. Pricing FAQ

Reference prices in USD, per kit of 10 vials. The final price is the one on your written quote. Need another currency? Your sales representative can quote it.

Specifications

P21 (P021) parameters

CAS number1246751-68-7
Molecular formulaC27H42N6O8
Molecular weight578.7 g/mol
PubChem CID56599151
Purity specification≥ 99.0% (HPLC)
AppearanceWhite to off-white lyophilized powder
Specifications5 mg
Kit10 vials per kit · minimum 1 kit per SKU
StorageStorage follows the label, COA and stability data of your lot. No storage temperature, solution hold time or light sensitivity is assumed for this form without data.
Specifications and reference prices
SKUContentPrice / kitPer vial
P2155 mg$515.20$51.52

Another format

P21 (P021) in a nasal spray bottle

Strengths
5 mg
Fill
10 mL or 20 mL
At least
10 bottles of one strength and size
Dispatched from
US stock, to US addresses

Nasal sprays are quoted by our sales team, separately from the kits on your quote list.

Black 10 mL nasal spray bottle with a clear dust cap
Spray bottle, 10 mL

Test results for every lot

Each lot of P21 (P021) has its own certificate of analysis with HPLC purity and mass-spectrometry (MS) identity. Other tests — water content, counter-ion, endotoxin — are available on request and listed on the COA when tested.

Batch COAs 1

P21 (P021) 5 mg batch coa: first page, low-resolution preview

Batch COA, lot release

P21 (P021)

5 mg

HPLC purity · MS identity

Previews show the first page only, at a resolution where small print cannot be read; numbers, dates, names and signatures are covered. The full, clear copy comes from our sales team.

COA of the batch you receive: ask our sales team.

Independent test fails? Full refund. How the refund works

How to read a COA →

Research background

About P21 (P021)

P21 is a small peptidomimetic designed from ciliary neurotrophic factor (CNTF). Its core is the tetrapeptide Asp-Gly-Gly-Leu (DGGL), acetylated at the N-terminus and finished with one adamantyl-glycine residue; the adamantane group makes it much more hydrophobic than the plain tetrapeptide.

It was introduced among neurotrophic peptides that incorporate adamantane (Li et al., 2010), and later mouse studies used it in a model of Down syndrome and in work on dendritic and synaptic deficits (Kazim et al., 2017; Baazaoui and Iqbal, 2017). The evidence is from animals. P21 is listed in Cognition & sleep with Semax and Dihexa.

Selected literature

  1. Li B et al. FEBS Lett. 2010;584(15):3359-3365.
  2. Kazim SF et al. Sci Rep. 2017;7:45561.
  3. Baazaoui N et al. Alzheimers Res Ther. 2017;9:45.

For laboratory research use. This page describes published research and the material we supply; it is not medical advice.

P21 (P021) FAQ

Does "DGGLAG" mean two extra residues?

No. The shorthand ends in one non-standard residue, adamantyl-glycine, not alanine plus glycine. The formula C27H42N6O8 and the molecular weight of 578.7 g/mol in the table reflect that.

What does the COA confirm?

HPLC purity and MS identity for the lot; MS shows the mass of the adamantyl-glycine-capped molecule rather than the bare tetrapeptide.

How to order

Ordering P21 (P021) from Medabol

Kit and minimum
P21 (P021) is sold by the kit: 10 vials of one specification (5 mg). The minimum is 1 kit per SKU, so an individual buyer can order a single kit and a lab can order many.
Price
Reference prices are listed per kit above, from $515.20. The kits of your whole quote list count together — 5–19 kits are 20% off every kit, and from 20 kits our sales team quotes the price — so P21 (P021) adds up with anything else you order; your written quote has the final price.
Documents
Every lot has its own COA with HPLC purity and MS identity; the order ships with the certificate of its lot, and our sales team sends it before you order if you ask.
Shipping
Orders ship from China by international express courier. Shipping from $80 per order; the written quote confirms the exact charge for your destination.
Payment
Nothing is paid on this website. After you send your quote list, a sales representative confirms the amount and shipping on WhatsApp or by email and tells you in that chat how to pay.
Research goal
Listed under Cognition & sleep — Neuropeptides such as Semax, Selank, DSIP and Pinealon.

Questions first?

Ask about P21 (P021).

Quantities, documents, timing or a spec that is not listed — the reply comes from a sales representative.

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Research use only. No requests for medical, human or veterinary use are accepted. See our privacy notice.

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