27424
The obtained results show that the NPHOS - PEO / SDS system behaves differently from other systems of double hydrophilic block polyelectrolyte and oppositely charged ionic surfactant because it forms water - insoluble PE - S for compositions close to the zero net charge of the complex .
 Chemical: NPHOS - PEO; Chemical: SDS
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: NPHOS - PEO; Chemical: SDS