DPHP

Di(2-propylheptyl) phthalate (also known as bis(2-propylheptyl) benzene-1,2-dicarboxylate, di(propylheptyl) orthophthalate, or DPHP) is an organic compound with the formula C₂₈H₄₆O₄. It is a phthalate and is the diester of phthalic acid and the 10-carbon branched-chain alcohol 2-propylheptanol. This colorless, viscous liquid is used for softening PVC plastics and is a general purpose PVC plasticizer.^[2] It possesses very good plasticizing properties and may be used as a direct replacement for DEHP and DINP in many applications.

DPHP

Names
Preferred IUPAC name Bis(2-propylheptyl) benzene-1,2-dicarboxylate
Other names Bis(2-propylheptyl) phthalate
Identifiers
CAS Number	53306-54-0
3D model (JSmol)	Interactive image
ChemSpider	83367
ECHA InfoCard	100.053.137
EC Number	258-469-4
PubChem CID	92344
CompTox Dashboard (EPA)	DTXSID5052173
InChI InChI=1S/C28H46O4/c1-5-9-11-17-23(15-7-3)21-31-27(29)25-19-13-14-20-26(25)28(30)32-22-24(16-8-4)18-12-10-6-2/h13-14,19-20,23-24H,5-12,15-18,21-22H2,1-4H3 Key: MTYUOIVEVPTXFX-UHFFFAOYSA-N
SMILES CCCCCC(CCC)COC(=O)c1ccccc1C(=O)OCC(CCC)CCCCC
Properties
Chemical formula	C28H46O4
Molar mass	446.672 g·mol−1
Appearance	Clear oily liquid[1]
Density	0.957-0.965 g/cm3[1]
Solubility in water	< 0.01 mg/L[1]
Refractive index (nD)	1.482-1.484
Viscosity	120-130 mPas
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references