Integral of the @E01927@ over time. The smallest electric charge found on its own is the @E02032@, \(e\), the charge of a @P04906@.
Sources: Green Book, 2nd ed., p. 14 [Terms] [Book] PAC, 1996, 68, 957. (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 970 [Terms] [Paper]