Buy Methylene Blue UK
Methylthioninium chloride, a phenothiazine dye, as a 10mg vial. Research use only.
from £44.991 option
- In stock Ships from the UK
- Same-day dispatch Order before 2pm
- Tracked delivery Free over £75
- Certificate of analysis On request
Methylene Blue is on the shelf at diluent.co.uk, held in British stock rather than ordered in, priced from £44.99 for the 10mg vial. It is supplied as vial. A weekday order placed before 2pm goes out the same day, tracked, boxed with nothing on the outside about the contents.
Shipping from inside the country is what removes the customs step: no clearance, no import charge, nothing sitting at a border. Purity is ≥99% by HPLC on every batch, and the certificate for the lot you are sent is yours on request against the number on the label.
Delivery runs £4.95, free above £75, tracked start to finish. See how ordering works.
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What is Methylene Blue?
Properly methylthioninium chloride, a phenothiazine dye that cycles between redox states. No peptide bond anywhere in it. Laboratories have used it as a stain for well over a century.
Specification
| Class | Phenothiazine dye |
|---|---|
| Also listed as | Methylthioninium chloride, Basic blue 9 |
| Molecular formula | C16H18ClN3S |
| Molecular weight | 319.9 |
| CAS | 61-73-4 |
| Purity | ≥99% by HPLC |
| Vial strength | 10mg |
| Light | Strongly photosensitive, store out of direct light |
| Certificate | On request, against the batch number |
What has Methylene Blue been studied for?
The record behind Methylene Blue is pre-clinical throughout. Not one of the papers listed below is a human trial. Below is what each paper set out to examine, sorted by the model it ran in:
Reviews of the literature
- Methylene blue, Review (PMID 12845393)
- [Methylene blue], Review (PMID 19069129)
Other published work
- How worthwhile is methylene blue as a treatment of malaria?, Not stated in the record (PMID 31237457)
Each line describes what a paper looked at. None of it reports an effect in a person, and no part of this site tells anyone how to use anything.
Where and how to buy Methylene Blue in the UK
How do you order?
Pick a strength from the table, put it in the basket and check out. There is no account to set up. The confirmation reaches you straight away and the payment details follow by email, because no card is taken on the site.
Why does UK stock matter?
The Methylene Blue you order leaves a warehouse in Britain. That means no customs step, no import charge and no days lost in transit from abroad. Before 2pm on a working day and it is collected that afternoon, tracked, in an outer box that gives nothing away.
What arrives in the box?
| Purity | ≥99%, by HPLC |
|---|---|
| Labelling | Compound, strength, format, purity, research-use statement and a batch number |
| Certificate of analysis | On request, matched to your batch number |
| Delivery | Tracked, UK only. £4.95, free over £75 |
| Returns | 14 days on unopened, sealed items, terms |
Reconstituting Methylene Blue
The vial arrives as a freeze-dried cake. It becomes a solution once bacteriostatic water goes in, and how much you add is what decides the strength of that solution. The quantity in the vial never changes, only the volume it is spread through.
What you see here are concentrations and volumes. Nothing on this site is dosage, protocol or administration guidance, and no number above is one either.
Loaded with 10mg and 2ml to start. Move either control and the numbers move with it. The full reconstitution calculator goes further, into syringe units, which water to pick and how long a mixed vial lasts.
| Vial | + 1ml | + 2ml | + 3ml | + 5ml |
|---|---|---|---|---|
| 10mg | 10 mg/ml | 5 mg/ml | 3.33 mg/ml | 2 mg/ml |
Take the 10mg vial: 2ml of bacteriostatic water puts it at 5 mg/ml. The sum is the milligrams on the label over the millilitres you put in. Every figure here is a concentration. None of them is a dose, and this site carries no dosage, protocol or administration guidance at all.
How should it be handled?
- Let a refrigerated vial reach room temperature first.
- Wipe the stopper with an alcohol swab every time you go in.
- Aim the water at the glass wall so it runs down, not straight onto the cake.
- Roll it gently between your fingers. Shaking makes foam, and foam is damaged protein.
- Give it a few minutes to go into solution. Done properly it finishes clear.
Storing Methylene Blue
| Sealed vial | Somewhere cool, dry and dark. For anything long term, the freezer. |
|---|---|
| Once reconstituted | Fridge, standing upright, away from light. Never freeze it once mixed. |
| Light | Very sensitive to light. Keep it dark. |
How long does it keep?
| Stored as | Keeps for |
|---|---|
| Sealed, frozen at −20 °C | Years. Nothing holds a lyophilised peptide better than this |
| Sealed, refrigerated at 2–8 °C | Months |
| Sealed, at room temperature | Weeks. Fine while it is in the post, not a place to keep it |
| Reconstituted, refrigerated | Think weeks, not months. Four weeks is the number most people work to once bacteriostatic water is in, which is exactly what its preservative is there for |
| Reconstituted, frozen | Best avoided. Ice crystals tear at peptides, and every freeze–thaw round makes it worse |
Treat these as the usual numbers for lyophilised peptides, not a stability result measured on one batch. Cold and dry buys time; moisture, heat, light and being shaken about take it away. Ask and we will send the batch certificate of analysis.
Is Methylene Blue legal in the UK?
We sell Methylene Blue as an unlicensed research compound, for laboratory research use only. There is no UK marketing authorisation behind it, it is not a licensed medicine, and it is not for human use, veterinary use or food.
Nothing of this kind is a controlled drug, and selling it as laboratory material is lawful. Selling or marketing it for people to take is not. That line is the reason you will not find a dose, a protocol, a route, a frequency or a medical claim anywhere on this site, and the reason asking for one by email gets the same answer.
A few molecules in this range also appear inside a licensed medicine sold under a brand name. That authorisation belongs to the finished product it was granted for; it does not follow the molecule anywhere else. Full terms.
Methylene Blue questions
Is methylene blue a peptide?
It is not. This is a dye, from the phenothiazine family.
How should it be stored?
Somewhere dark. Light affects it strongly.
Where can I buy Methylene Blue in the UK?
Methylene Blue is available in the UK from diluent.co.uk, from £44.99, a single 10mg size, as vials. British stock on a British courier. Nothing to pay on import, nothing to handle, nothing for an officer to open. That lands at £4.50 the milligram. It turns up as freeze-dried powder, so the concentration is yours to set when you mix it. Get the order in before 2pm on a weekday and it leaves that day, tracked, plainly packaged. Batches go to a third-party lab and come back at ≥99% by HPLC, and the certificate for yours is there if you ask, see how to order.
How much does Methylene Blue cost?
It starts at £44.99 for the 10mg, £4.50 per mg. Postage runs £4.95, and nothing at all above £75.
How much bacteriostatic water do I add to Methylene Blue?
There is no single right answer, because the volume you choose is what fixes the strength. Take the 10mg vial: 1ml puts it at 10 mg/ml, 2ml at 5 mg/ml, 3ml at 3.33 mg/ml. The 10mg in the vial stays 10mg regardless. These are concentrations. They are not doses.
How should Methylene Blue be stored?
Still sealed and dry it will sit for years at −20 °C, months in a fridge at 2–8 °C, weeks at room temperature. Cold and dry is what buys the time. After mixing it goes in the fridge standing up, and four weeks is the figure most work to with bacteriostatic water. Never freeze it once mixed: ice crystals tear peptides apart and each freeze–thaw round does it again.
What purity is your Methylene Blue, and can I see a certificate?
≥99%, measured by HPLC. Quote the batch number on your label and we will send the certificate of analysis for that lot. If you would rather see where current stock sits before you commit, ask and we will tell you.
References
- Methylene blue. American journal of therapeutics, 2003.. PMID 12845393
- [Methylene blue]. PMID 19069129
- How worthwhile is methylene blue as a treatment of malaria?. Expert review of anti-infective therapy, 2019.. PMID 31237457
Each one links out so you can read the paper itself.