3177
Given the lack of eye irritation in rabbits after direct instillation of 0 . 2 % ( NaPO ( 3 ) ) 6 * H2O , an acute ocular contact limit of 50 mg PO4 / L serves as the overall do not use level .
 Chemical: ( NaPO ( 3 ) ) 6 * H2O; Chemical: PO4
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: ( NaPO ( 3 ) ) 6 * H2O; Chemical: PO4