7331
Photoinitiators used in food packaging ink , such as 2 - isopropylthioxanthone ( 2 - ITX ) , have been shown to migrate into food and beverages .
 Chemical: 2 - isopropylthioxanthone; Chemical: 2 - ITX
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: 2 - isopropylthioxanthone, 2 - ITX 
Answer:
 Chemical: 2 - isopropylthioxanthone; Chemical: 2 - ITX