13193
The TEM and SEM images of the formulation suggested that particle size was within 20 - 100 nm and spherical in shape , smooth morphology and coating of Tween - 80 on the NPs was clearly observed .
 Chemical: Tween - 80
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: Tween - 80