Table 1. Data on test chemicals.
| Chemicals | Abbreviation | Supplier | CAS no. | Purity (%) |
| Di-n-butylphthalate | DBP | Tokyo Kasei | 84-74-2 | >99 |
| Mono-n-butyl phthalate | MBP | Tokyo Kasei | 131-70-4 | >99 |
Tokyo Kasei: Tokyo Kasei Kogyo Co., Ltd.
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