One wonders why? Know nothing about the product or REACH but here's what Wikipedia says about Dibutyl Pthalate
"Dibutyl phthalate (DBP) is an organic compound which is commonly used as a plasticizer because of its low toxicity and wide liquid range. With the chemical formula C6H4(CO2C4H9)2, it is a colorless oil, although impurities often render commercial samples yellow.[3]"
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