G'day lads, I've come accross a 500g tub of clenbuterol powder.

Can somebody help me work out how to measure 20mcg then I'll be on my way
I have done a search but all I came up with was how to make it injectable which I don't want to do, I just want to put it in my OJ and drink it...
I'm not another fat person looking for an easy way out, I've been training near on 3 years and am currently 89kg @ 11%BF and around 175cm tall, just want to rip up a bit more.

Heres whats on the tub..

Label:

BRONCOPULMIN

ORAL BRONCHODILATOR
FOR HORSES

ACTIVE CONSTITUENT:
16 ug/g CLENBUTEROL HYDROCHLORIDE
(equivalent to 14.1 ug/g CLENBUTEROL)

How would i measure our 20mcg of the powder any ideas?

Cheers
Brad