12830
No consensus exists on how to address possible toxicity of nanomaterials as they interfere with most in vitro screening tests based on colorimetric and fluorimetric probes such as the dichloro - dihydro - fluorescein diacetate ( DCFH - DA ) assay for detection of oxidative species .
 Chemical: dichloro - dihydro - fluorescein diacetate; Chemical: DCFH - DA
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: dichloro - dihydro - fluorescein diacetate; Chemical: DCFH - DA