I’ve found a couple of recipes that I would like to try, but I’m having difficulty finding Acetyl Pyrazine 10%. The 5% version is, of course, much easier to come by, but even if I weren’t in the U.S., Google suggests that it would still be near-ipossible to buy.
Is there an easier alternative? Could the 5% be substituted?
Its a 10pct dilution vs a 5pct so just use half of the 5pct AP, doube the 5pct 
You will need to add double the 5% as 10% is double the concentration
Aka say you are making a AP dilution of 10% in a 100ml
Then you need 10grams of AP (powder as this ingredient is a powder) to 100ml of PG
5% would be 5grams per 100ml
Ap is always diluted in PG for any application.
My suggestion is to buy AP as a pure powder ingredient. 100grams is about AUD$100 and dilute your own
You can easily put in a nutrabullet and blend the weighed ingredients
Hope that helps
Ps 10% is not used in any industry normally as 5% is the standard
Lol, Thank you for chiming in …This is the correct answer and what i should hve said above
Thanks so much! I was really confused there for a while. 
All good, knew what you meant , just wanted to push him in the right direction
Math 
@Elissa01 I’m curious what recipes you found that use 10% AP.
Sure, just double it.
If the recipe calls for 1% of a 10% AP dilution, you would add 2% of a 5% AP dilution for the same effect.
I.e. if what you’ve got is HALF as strong, then you use TWICE as much.
I was gonna say the only concentrations I’ve ever used/seen have been TPA Acetyl Pyrazine 5% and VTA 6%.