ee value
A core metric for measuring the purity of a chiral product, expressing the percentage by which one enantiomer in the product is in excess relative to the other. An ee value of 100% represents a single pure configuration.
Core Facts
Timeline (last 90 days)
Enantiomeric excess (ee value) is used to quantitatively describe the degree of excess of one enantiomer relative to the other in a product; the "from 50:50 to 51:49" observed by Kogan corresponds to an ee value of about 2%.
Enantiomeric excess (ee value) is defined as the ratio of the difference between the concentrations of the two enantiomers to their sum, expressed as a percentage.
Regulators usually require an ee value higher than 99% for single-enantiomer drugs.
All Facts (3)
Enantiomeric excess (ee value) is defined as the ratio of the difference between the concentrations of the two enantiomers to their sum, expressed as a percentage.
65%UnverifiedEnantiomeric excess (ee value) is used to quantitatively describe the degree of excess of one enantiomer relative to the other in a product; the "from 50:50 to 51:49" observed by Kogan corresponds to an ee value of about 2%.
50%UnverifiedRegulators usually require an ee value higher than 99% for single-enantiomer drugs.
50%