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Chemical name: Diisobutyl phthalate
CAS No. 84-69-5
EINEC No. 201-553-2
Molecular formula: C16H22O4
Molecular weigh: 278.35
Synonyms: Phthalic acic, diisobutyl ester, 1,2-Benzenedicarboxylic acid, bis-(2-methoxypropyl) ester
Diisobutyl phthalate (DIBP) is a specialist plasticiser often used in combination with other high molecular weight phthalates. It is a fast fusing plasticiser which, by itself, is too volatile and therefore it is frequently employed as a gelling aid in combination with other plasticisers for nitrocellulose, cellulose ether, and polyacrylate and polyacetate dispersions.
DIBP is a nearly colourless, clear and practically anhydrous liquid with a near unnoticeable odour. It is soluble in usual organic solvents and is miscible and compatible with all of the monomeric plasticisers commonly used in PVC. DIBP is almost insoluble in water.
Diisobutyl phthalate (DIBP) has very similar application properties to Di-n-butyl phthalate (DBP) and may therefore be used to substitute DBP in most, if not all, of its applications. These range from the plasticisation of PVC to the production of paints, printing inks and adhesives.