Formula reader

This is where you build a bottle, see which compound really dominates — by odour threshold, not by percentage — then compare two versions, check the label at your dilution, and keep it before you weigh.

This tool cannot predict how something smells. It works out the structure of the mixture: what dominates, what arrives first, what must go on the label. Smells do not add up — one compound masks another, and some change character completely with concentration. No model can do that, and this tool does not pretend to.

Formula library

Pick a formula to start, then adjust the shares and watch how the figures change.

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The bottle holds exactly 10 ml and cannot overflow — raise one component and you have to lower another, just as when you blend for real. The coloured column on the left is the real volume in the bottle; the figures on the right are odour strength.

#	Component	Share in the bottle	Odour threshold	Mass vs odour strength

Add a component

This box also searches odour descriptions — type smoky, green, earthy to see which components in the library are described that way.

Have a GC-MS report for a lot? Paste it into the analysis reader — it matches it against the library and opens it here.

How this bottle smells

Built on a 10 ml bottle. The three stages below are put together from the descriptions of the components that dominate at each point in time — not a prediction of the real smell.

The link holds the whole formula, so whoever you send it to opens exactly what you are looking at. Nothing is stored on the server.

Two ways of reading the same bottle

Tap to switch between the two. One is what the analysis prints; the other is what your nose actually receives.

Unfolding over time

Each patch is one component. Size follows odour value, not mass — so a compound making up a thousandth of a per cent can still spread wide. Position follows boiling point: light compounds on the left fade early, heavy ones on the right stay.

0 seconds in

The time axis is built from boiling points, on a log scale — three seconds to four hours. It is a model of order and relative persistence, not a measurement of real evaporation rates.

What the label must declare

Declaration thresholds apply to the finished product, not to the bottle of essential oil. Choose what you intend to put this bottle into:

Why call it Grenouille’s formula library

In Süskind’s novel, Baldini believes the craft lies in the formula: counting drops, weighing, the right proportions, the right order. He lectures Grenouille at length on it.

Then Grenouille recreates the perfume Baldini cannot analyse — without weighing, without counting, grabbing bottles by eye — and makes something better than the original.

This tool belongs to Baldini. It can count, weigh and check, and it tells you what the nose does not: how many times over its threshold each compound is, what evaporates first, what must go on the label.

It still cannot replace the nose. That is not false modesty — it is the real limit of anything that can be calculated from a table of figures.