Carts

Because no brand publishes one, and the figure cannot be derived from anything a brand does publish. A cartridge is certified by percentage of total mass and by net weight, which together give a container total and nothing else. Turning that into a dose needs a puff count, and a puff is not a fixed unit: it varies with draw length, with device power, with oil viscosity and with the person.

The numbers that circulate for this, usually two to eight milligrams a puff, come from retailer explainers rather than from measurement, and a range that wide is not a dose, it is a shrug. This site has one rule, which is that a number it did not read off a real source is not published. That rule costs a figure here, and the figure is the one people most want. Leaving it out is the point.

The practical version: a can tells you what you are about to take before you take it, and a cart does not. That is a real difference in kind, not a gap in this database.

Most cartridges have no temperature setting at all. They have a battery with a voltage, and voltage is a poor proxy for what the coil actually does. In the one study that measured this directly, a variable-voltage pen set to its lowest setting, 2.4V, reached an average coil temperature of 443 °C, while a temperature-controlled device set to 270 °C averaged 246 °C. The 4.0V setting on the same variable pen averaged 543 °C, with a standard deviation of nearly 96 degrees. Only the temperature-controlled system stayed under 400 °C for a whole puff.

That matters because the harm here is thermal. Combustion byproducts form as you approach the temperatures the authors flag as excessive, above roughly 900 °C, and terpenes degrade well before that: heating the terpenoids found in cannabis concentrates produces acrolein, methacrolein and benzene among other degradation products. Running cooler is the only lever a user actually has, and on most hardware they do not have it.

So the honest guidance is short. If your device has a real temperature setting, lower is better supported than higher. If it only has voltage settings, the number on the dial does not tell you the coil temperature and no published conversion will. And a device that gets hot enough to taste burnt is past the point where any of this was still a good idea.

What is deliberately absent: a table of terpene boiling points matched to flavours. Those tables are everywhere and almost none of them cite a measurement of an actual device, which is a different thing from the boiling point of a pure compound in a flask.