Cytrynian sodu (CAS 68-04-2)                                            kod CN 2918 15 00;

Izoaskorbinian sodu (CAS 6381-77-7)                              kod CN 2932 20 90;

Sorbinian potasu (CAS 24634-61-5)                                  kod CN 2916 19 95;

Witamina C i jej pochodne                                                   kod CN 2936 27 00.