1567
Recognizing limited empirical data from which to calculate an ocular reference value , a skin contact ' Do Not Use ' concentration of 30 mg Mn / L is recommended based on the skin irritation in some patients after a 10 - min contact with 100 mg KMnO4 / L .
 Chemical: Mn; Chemical: KMnO4
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: Mn; Chemical: KMnO4