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Mandarin oil were extracted twice to ensure the purity of limonene, respectively.The spectrum testandSolvent solubility of chemical analysis indicate that it is a certain fluorescence effect and the ultraviolet absorption scope of peak is at 220~280nm, the capability to dissolve polyphenyl foam plastics replace benzene, methylbenzene and tetrachloroethylene by Mandarin oil, the results show that limonene is a safe, non-toxic organic solvent with high performance in chemical industry.