20745
FTIR study in the 3000 - 3800 cm ( - 1 ) region identifies that the relative population of the surface - bound water molecules is higher in AOT RM compared to that in Igepal RM , and in mixed systems it also follows a linear trend with XIgepal .
 Chemical: AOT; Chemical: Igepal
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: AOT; Chemical: Igepal