Biobased polyglyceryl esters and compositions comprising the same

A microemulsification system comprising:

• from about 30 wt % to about 90 wt % biobased polyglyceryl ester microemulsifier composition, wherein the biobased polyglyceryl ester microemulsifier composition is:
• a mixture including one or more compounds of Formula (I):
• wherein:
• PG is a polyglyceryl group comprising greater than 40% hexaglycerol and higher polyglycerols and less than 60% pentaglycerol and lower polyglycerols,
• R is a linear C6 alkyl group and RCO is derived from biobased n-heptanoic acid,
• n=from 1 to 3, and
• wherein substantially all of the carbon present in the one or more compounds of Formula (I) is biobased and wherein the biobased polyglyceryl ester microemulsifier composition has a degree of esterification (DE) of from about 6% to less than about 15% and a concentration of pendant hydroxyl groups of greater than about 15.2 wt %;
• from about 5 wt % to about 50 wt % medium chain terminal diol;
• and
• from about 0.1 wt % to about 20 wt % medium chain alkylhydroxamic acid, a salt thereof, or combinations thereof.