It's just a different color used for identification purposes from a different food coloring used. My SR has all been darkHad to order another 2 bottles of SR 9009 from Sarmsx and when bottles arrived noticed liquid in both bottles was black instead of previous colour of clear green so you can understand my concern, asked Sarmsx to explain different colours but had no reply, these bottles do not look right any thoughts please.
(PM me for a price list for Biotech Labs and 10% discount)