Solubility of Menthol Crystals in PG (grams per milliliter)

[NoLeak]

Does anyone know the number for solubility of menthol crystals in PG? I'm looking for a number with the units "grams per milliliters" or "grams per gram." I'd like to measure my menthol crystals using a scale (grams) rather than the more common volume method (teaspoons). My new scale is accurate to the milligram so it's accurate enough to weight out menthol crystals for small batches.

 

[NoLeak]

I found a ballpark answer on the Wizard Labs menthol page:

Menthol crystals can be diluted in a base of either alcohol or Propylene Glycol to make a flavoring solution.
Solubility in Propylene Glycol is up to 50% and solubility in alcohol is greater than 100%.

Menthol Crystals - 15 grams (WL)

I'm assuming the "up to 50%" figure is by weight.