n [phthalic acid + ¹-ate] (1925) (DBP) C₆H₄(COOC₄H₉)₂. One of the most widely used plasticizers for cellulose nitrate and other cellulose-ester and -ether lacquers and coatings. It is a primary plasticizer for many other resins, but its high volatility limits its use in vinyls. Sp gr. 1.0484 (20/20°C); flp, Cleveland Open Cup, 171°C (340°F); bp, 340°C. Open image in new window