7376
This smart fluid is an aqueous solution of cationic surfactant oleyl bis ( 2 - hydroxyethyl ) methyl ammonium chloride ( OHAC , 3 . 4 mM ) and the sodium salt of 4 - phenylazo benzoic acid ( ACA , 2 mM ) .
 Chemical: oleyl bis ( 2 - hydroxyethyl ) methyl ammonium chloride; Chemical: OHAC; Chemical: sodium; Chemical: 4 - phenylazo benzoic acid; Chemical: ACA
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: oleyl bis ( 2 - hydroxyethyl ) methyl ammonium chloride; Chemical: OHAC; Chemical: sodium; Chemical: 4 - phenylazo benzoic acid; Chemical: ACA