Volumetric dosing is a relatively easy way to accurately dose substances in the sub-milligram range. It involves dissolving a known quantity of a substance in a known quantity of water, from there it's very easy to find the concentration of the substance on a milliliter basis.


Some substances, such as the NBOMeN-Benzyl-Ortho-Methoxy derivatives of psychedelic phenethylamines. series, are active at sub-milligram doses. These types of chemicals require extreme precision that can't be achieved with consumer grade scales. Volumetric dosing is the only way to dose something like that in a safe and reliable manner.


  1. Research what your substance can be dissolved in, and at what concentrations. Some drugs (Such as alprazolam powder) are not dissolved readily in water, and instead need a strong spirit such as PGP or everclear. Sometimes, it is necessary to use a stronger solute when a higher concentration is desired.
  1. Take the substance you wish to dissolve, and weigh it with an accurate milligram scale. (Generally you measure out a substantial amount more than you intend on dosing, to increase the margin of error)
  1. Once you have a known quantity, you need to decide what concentration you want it. For example, if I have 100mg of 25i-NBOMeN-Benzyl-Ortho-Methoxy derivatives of psychedelic phenethylamines. in powder, and I want 500µg in every milliliter of solute (A concentration of 500µg/mL) I would need 200mL of solute.
The concentration can be calculated with the following formula
quantity of substance / amount of solute = concentration.
Ex. 100mg/200mL=500µg per mL
Remember: The lower the concentration, the easier and safer it is to dose! Ensure your margin for error is as high as necessary.

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