Well, I have not seen the sources. That is an anionic surfactant and those are rather common. Triton-X 200 is one like that IIRC. Many of them are interchangable. But, use of an ionic surfactant indicates some kind of support/chemical interaction that must be overcome by having a charged (Ionic) surfactant. Very unusual if true. Perhaps it serves several purposes. This is not a surfactant that one would normally choose.

Can you give a reference?