The limits of this bench

This is not medical advice

This is educational arithmetic on figures entered by the reader. It is not medical advice, not a dosing protocol, and not a recommendation that anything be prepared, obtained or administered. Nothing on Vial Bench is medical, clinical or pharmaceutical advice, and nothing here substitutes for it.

A question about anyone’s health belongs with a licensed clinician who can examine the person asking. A decision about anybody's health taken on the strength of a page on this site is taken against the explicit advice of this notice.

No amount is stated for anybody

Nothing here states what quantity is appropriate for anyone, and there is no function in it that produces an amount to administer.

That is structural rather than a policy laid on top. Every tool here requires the reader to supply the quantity and then converts between representations of what the reader already stated. There is no function behind this bench that accepts a person, a goal or a condition and returns an amount, and there is no table of amounts anywhere in it. Arithmetic on a figure somebody else chose is a converter, and a converter cannot recommend.

Where an amount appears as a column heading - the seven amounts on each vial page, for instance - it is a figure chosen to span the range that vial size makes arithmetic sense at, and it is not a suggestion. No page here states a frequency, a schedule, a route, a duration or a per-kilogram figure, and no page describes how to prepare or administer anything. The arithmetic of a volume is not an instruction to draw it.

This bench holds no facts about any compound

Unusually for this category, there is no compound data on this site at all: no names, no molar masses, no potencies, no half-lives, no tables of any kind about any substance. Where a calculation needs one of those figures, the tool asks for it and says where that kind of figure comes from.

The two reference families here describe manufactured objects rather than molecules. The barrel pages describe printed calibrations; the vial pages work through arithmetic on a mass printed on a label. Both are checkable by a reader holding the object.

Nothing is recommended, and nothing can be bought here

This site does not recommend that any substance be purchased, imported, possessed, prepared or administered, by anyone, for any purpose. No supplier, vendor, pharmacy or compounder is named, ranked, linked or implied anywhere on it, and there is no route from any page here to buying anything.

Compounds of the kind this arithmetic is used on are largely research chemicals that are not approved by the FDA for human use.

What is lawful to possess, import, supply or administer differs between jurisdictions and changes over time. Nothing here is an assurance that anything described is lawful where a reader is, and nothing here is legal advice.

Exact arithmetic is not an accurate measurement

An exact calculation is not an accurate measurement: what is actually in a syringe depends on the preparation and the device, neither of which this page can see.

The arithmetic is exact: quantities are held as fractions of whole numbers and rounded once, at the point of display. That precision describes the calculation and nothing else. It says nothing about whether a vial contains what its label claims, whether a solid dissolved fully, whether a barrel matches its own printing, or whether a figure was read correctly off it.

Where the inputs do not support an exact answer the tool says so instead of rounding the uncertainty away. A strength computed without a measured finished volume is labelled an upper bound, a volume derived from it is labelled a lower bound, and a reading that does not land on a printed mark names the mark it misses.

Who has checked this, and who has not

No qualified clinical reviewer is recorded against this site, and no credential is claimed anywhere on it. The arithmetic is covered by an automated test suite and by mutation testing, which introduces deliberate defects into the engine and verifies that the tests catch each one. That is evidence about software, not clinical review, and the two are not substitutes for each other.

No contributor here is presented as a physician, pharmacist, chemist or researcher, because none is. No byline, qualification, affiliation or certification appears anywhere on this site, and none is claimed in its structured data either.

Error, and what happens to it

An arithmetic result that can be shown to be wrong is a defect, and the test suite exists so that such a defect fails the build rather than reaching a reader. A figure in a table that disagrees with the tool that should have produced it is the same kind of defect, and is why the tables are generated rather than typed.

The site is offered as it stands, with no warranty of accuracy, completeness or fitness for any purpose. Anyone relying on a figure here for anything that matters should check it independently, which is why every tool shows its working.