17507
The reaction is self - limiting due to the immiscibility of octane and water , and the extent of penetration of the Si - H surface into the porous layer is dependent on the time of exposure to HF ( aq ) .
 Chemical: octane; Chemical: Si - H; Chemical: HF
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: octane; Chemical: Si - H; Chemical: HF