Ceramide 4

ceramide 4 (retired) is the n-acylated sphingolipid having the erythro structure that conforms generally to the formula, where m has a value ranging from 13 to 27 in which the acyl moiety may be saturated or mono-unsataurated and n has a value ranging from 10 to 16. ceramide 4 is similar to ceramide 5, however, the acylating hydroxy acids are generally shorter in ceramide 4 than in ceramide 5. the inci name, ceramide 4, originally developed in 1997, was designated with a retired status in 2014. for an interim period of time, trade name assignments formerly published with the inci name ceramide 4 will be retained in the retired monograph, and also published with the new name assignment, ceramide as.