Amphoteric surfactants

[3-(Alkyldimethylammonio)-1-propanesulphonates]
Octyl (C8, Krafft temperature 0 degrees C)
Decyl (C10, Krafft temperature 0 degrees C)
Dodectyl (C12, Krafft temperature 0 degrees C)
Tetradecyl (C14, Krafft temperature 16 degrees C)
Hexadecyl (C16, Krafft temperature 16 degrees C)
Octadecyl (C18, Krafft temperature 16 degrees C)
Test organisms;
Green algae (formerly including protozoa): Chlamydomonas reinhardi (ref. ID; 6091)