This page is for anyone looking to buy finasteride as a research chemical, and it sets out every finasteride item in the catalogue, with pack details and prices. If you want to order finasteride online for laboratory work in the United Kingdom or Ireland, you will find below the chemistry of the molecule, the way each item is supplied and stored, and what shipping from the Netherlands means for a British or Irish address. Everything listed as finasteride for sale online is reference material for laboratory and research purposes, never a preparation for people or animals.
Price and packaging
| Item | Pack | Price |
|---|---|---|
| Finasteride 1 mg | Tablets, 1 mg per tablet | € 69,95 |
| Finasteride 5 mg | Tablets, 5 mg per tablet | € 79,95 |
| Dutasteride 1 mg | Tablets, 1 mg per tablet | € 79,95 |
There is no price per milligram column here. The milligram figure in each name is the strength of one tablet, not the total mass in the pack, so dividing the price by it would give a unit price that means nothing. On a lyophilised vial that figure is the whole content and the arithmetic does work, which is why a per-milligram figure is quoted on the vial pages and not here. The price in the table above is the price of the pack as supplied.
What finasteride is
Finasteride is a synthetic 4-azasteroid, catalogued under CAS number 98319-26-7, with the molecular formula C23H36N2O2 and a molecular mass of about 372,55 g/mol. It also appears in older literature under the development code MK-906. The skeleton is a steroid carrying the substitution that defines the class: position four of the A ring carries a nitrogen atom in place of carbon, which is what 4-aza refers to. At position seventeen sits a tert-butyl carboxamide group, in place of the side chain a natural androgen carries there.
In the literature the compound is described as an inhibitor of the type II isoform of 5-alpha reductase, the enzyme that converts testosterone into dihydrotestosterone. That is a point of enzymology, and nothing on this page goes beyond it.
Physically it is a white crystalline solid, poorly soluble in water and far more soluble in ethanol, methanol or dimethyl sulfoxide. That is the practical point separating it from the peptide material in our catalogue, which arrives as a lyophilised cake destined for aqueous solution.
Where it sits in the catalogue
The nearest neighbour we carry is dutasteride, also a 4-azasteroid but a structurally busier one, with the formula C27H30F6N2O2 and a mass near 528,5 g/mol. The two trifluoromethyl groups on its aromatic ring account for the six fluorine atoms and much of the extra mass. In enzyme studies it is described as acting on both the type I and the type II isoform, where finasteride is characterised as selective for type II. That is why both sit side by side in a research catalogue.
Minoxidil is often named in the same breath and is chemically nothing like either of them: a piperidinopyrimidine N-oxide, C9H15N5O, about 209,25 g/mol, with no steroid framework at all. None of these three is a peptide, and the amino acid material at buy peptides is stored and handled under quite different rules.
Form, handling and storage
Tablets are kept dry and dark, at room temperature, in their original closed container and away from humidity and direct light. That is the whole of it for the three items above.
Elsewhere in the catalogue the format is a lyophilised vial, and the handling there is more particular. Bacteriostatic water is run slowly down the inside wall of the vial rather than straight onto the cake, then the vial is swirled gently until the powder has gone into solution. Shaking is avoided. Once reconstituted, the vial belongs in the fridge and not in the freezer, since freezing and thawing an aqueous solution is what damages it. A nasal kit is supplied as the lyophilised vial with an empty nasal spray bottle to assemble it in; each kit lists its exact contents on its own page.
Shipping and analysis
Everything ships from the Netherlands. To the United Kingdom the rate is a flat € 15,95, and shipping is free from € 200. To Ireland the flat rate is € 14,95, again free from € 200. All prices on the site are in euros.
The United Kingdom is not in the European Union, so a parcel to a British address is an import. Any import VAT or duty that falls due is charged by the carrier to the recipient. Ireland is in the European Union, so no import charges of that kind arise on an Irish delivery. Every batch is analysed and a certificate of analysis is available, which you can read through our published certificates of analysis.
Frequently asked questions
What may I use this for?
Laboratory and research purposes only. It is not for human or veterinary use, and no instructions for use are given.
Is finasteride a peptide?
No. It is a small synthetic 4-azasteroid, a single molecule of about 372,55 g/mol with no amino acid sequence.
What is the difference between the 1 mg and the 5 mg item?
The substance is identical. The number is the strength of a single tablet, 1 mg in one item and 5 mg in the other. The pack price is € 69,95 and € 79,95 respectively.
How does finasteride differ from dutasteride?
Both are 4-azasteroids. Dutasteride is the larger molecule, carries two trifluoromethyl groups, and is described in the literature as acting on both isoforms of the enzyme, while finasteride is characterised as type II selective.
For laboratory and research use only. Not for human or veterinary use.
