1、According to EU standards, as a food additive, thiabendazole must have an optical rotation requirement of [α]²⁰_D ≥ (+)122° (c=1, H₂O).

2、Based on the notation for chiral compounds, d- or (+) indicates dextrorotatory, so theoretically, thiabendazole is dextrorotatory.

3、Chiral catalysis technology in artificial synthesis allows for the production of single enantiomer molecules, i.e., dextrorotatory thiabendazole.

4、Dextrorotatory thiabendazole is the safe and effective form that should be present. It's essential to recognize dextrorotatory thiabendazole.