A series of extended surfactants (e-surfactants), sodium monododecyl polyoxypropylene phosphates (C12PpP) with propylene oxide (PO) average addition number (p) (p=3, 6, 9) were synthesized from dodecyl alcohol by propoxylation and phosphorylation followed by neutralization. These e-surfactants were characterized by FTIR and ESI-MS. The properties of C12PpP, such as Krafft point (TK), electrolyte-tolerance, surface tension, foaming power, emulsifying power, wetting power and detergency were tested and compared with those of monododecyl phosphate potassium salt (MAPK). The results showed that these e-surfactants exhibited better foaming power, emulsifying power, wetting power and detergency than those of MAPK. Due to their TK < 0 ℃, the C12PpP surfactants demonstrated excellent low-temperature water solubility, which overcomes the shortcomings of sodium counterpart of MAPK insoluble at low temperature. At the same time, the C12PpP surfactants showed better calcium-tolerance, which was 5~8 times greater than that of MAPK. The C12PpP surfactants almost had the same detergency for protein and sebum soiled swatches as MAPK. Therefore, the synthesized C12PpP surfactants have the similar low irritation to MAPK and were able to replace MAPK in personal care and toiletries products.