About Peptx
We started because UK researchers were underserved.
Researchers in the UK were paying reseller prices, waiting weeks for parcels from overseas, and were rarely shown an independent test they could check for themselves.
So we built the supplier we wanted to buy from. Today Peptx holds stock in the UK for fast dispatch, ships Factory Direct kits to researchers worldwide, and invests heavily in independent laboratory testing, published in full.
Three problems, fixed in order.
First, we cut out the reseller
We began with Factory Direct: kits shipped straight from the manufacturer to researchers anywhere in the world, with no reseller margin added on the way.
Then, we put stock in the UK
Waiting weeks is no use when the work is already scheduled. UK Express keeps single vials here in the UK, with no minimum order, and we aim to dispatch within 24 hours.
Now, we prove what is in the vial
A supplier's word is not evidence. We pay independent laboratories to test what we sell, and we publish every result, pass or fail.
Two ways to buy
UK stock for speed. Factory Direct for scale.
The UK is where we started and where our stock is held. Factory Direct carries the same standard to researchers everywhere else.
Single vials from UK stock
UK Express
Stock held on a shelf in the UK, sold one vial at a time. Built for researchers who need a compound this week, not next month.
- No minimum order
- We aim to dispatch within 24 hours, by Royal Mail Tracked 24
- Tracked delivery across the UK, with shipping to Europe and beyond
Factory Direct kits, straight from the manufacturer
Factory Direct
Kits of 10 vials shipped from our manufacturing partners to your door, with no reseller in between. That is why the price per vial is lower.
- Factory prices on kits of 10 vials
- Tracked delivery to researchers worldwide
- Current delivery times are always shown at checkout
Quality
Our biggest investment is independent testing.
Our aim is simple: to be the best quality supplier a researcher can buy from, and to be able to show it. So a growing share of what we earn goes straight back into third-party laboratory testing.
We test stock we buy in, pull random vials from our own UK shelves, and sample new suppliers before anything of theirs is listed. Every result is published exactly as the laboratory reported it, pass or fail, and each certificate can be checked with the lab that issued it.
The next round goes further than mass and purity. Every sample in it is tested for four things:
- Mass (net content)
- Purity (HPLC)
- Bacterial endotoxins
- Sterility
Where this is heading: multi-test screening of UK Express stock, batch by batch. We are not there yet. Testing today is selective, and we will only claim more once the results are published.
Our published record, live
- lab results published
- 10
- independent laboratories
- 5
- published purity range
- 99.29 to 99.97%
- further tests due
- 15
Every compound also carries a stated minimum purity. If an independent test shows a vial below it, our purity guarantee applies.
Who you are dealing with
A registered UK company, with a support team that answers.
UK first, worldwide reach
UK Express ships from UK stock: to UK addresses first, and on to Europe and beyond. Factory Direct delivers Factory Direct kits to researchers around the world. Wherever you are, you get the same standards and the same support.
Our support team answers
WhatsApp the support line on +44 7916 279562 or email Support@peptx.co.uk, usually within the hour on working days.
PX Reagents Ltd
Peptx is the trading name of PX Reagents Ltd, registered in Scotland, SC890970. Registered office 2/3, 48 Clyde Offices, West George Street, Glasgow G2 1BP. ICO registration ZC236652.
Check us out
Everything here can be checked.
Is Peptx a registered company?+
Yes. Peptx is the trading name of PX Reagents Ltd, registered in Scotland under company number SC890970, registered office 2/3, 48 Clyde Offices, West George Street, Glasgow G2 1BP. The record is public on Companies House, and the company is registered with the ICO (ZC236652).
Can I check your lab results myself?+
Yes. Every independent result we publish is in the COA library with the laboratory’s own report. Where the laboratory offers online verification, as Janoshik and Chromate do, the result links to the lab’s record. Janoshik shows our company as “PX”, short for PX Reagents Ltd. Each result says which product and strength it covers.
How do I pay?+
By bank, through regulated open banking providers (Wallid or Fena): you approve the payment in your own banking app and it goes straight to PX Reagents Ltd. Your card and bank login are never shared with us. We do not accept crypto.
Who do I talk to if something goes wrong?+
Our support team: WhatsApp the support line on +44 7916 279562 or Support@peptx.co.uk.
Compliance
For laboratory research use only.
Everything Peptx sells is supplied strictly for laboratory and research use. Nothing is intended for human consumption, veterinary use, food or cosmetic use.
By ordering, buyers confirm that compounds will be used only for qualified scientific research, by or under the supervision of appropriately trained people.
Peptx makes no therapeutic claims about any product. Product descriptions and specifications are provided for research reference only.
Browse the Peptx catalogue
Independently tested compounds, typically 99%+ purity (HPLC), factory-direct pricing. UK stock dispatches within 24 hours.
Sold strictly for laboratory research. Not for human consumption.