Technical properties of DINP
DINP is a general, all-purpose plasticiser.
Heat resistance, low temperature resistance and volatility resistance are some of its main properties that make it suitable for a wide range of applications.
Physico-chemical properties
| CAS Reg. No: |
68515-48-0 and 28553-12-0
(different alcohol chains depending on production method) |
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| EINECS No: |
271-090-9 and 249-079-5 |
| Synonyms / IUPAC name: |
1,2-Benzenedicarboxylic acid, di-C8-10 branched alkyl esters, C9-rich; Di-isononyl phthalate |
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| Empirical Formula: |
C26H42O4 (average) |
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| Structure: |
 |
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R1 and R2 (not necessary identical) are either mainly C8H17 to C10H21 or C9H19 isomers. In the case where R1 and R2 is C9H19 isomers, it is 10 % n-nonyl, 35-40 % methyloctyl, 40-45 % dimethylheptyl, 5-10 % methylethylhexyl.
| Molecular weight: |
420.6 (average) |
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| Melting point: |
-40 to -54°C |
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| Boiling point: |
424°C |
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| Density: |
ca. 0.975 at 20°C |
| Vapour pressure: |
6 x 10-5 Pa at 20°C |
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| Solubility in water: |
0.6 µg/l 20°C |
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| Henry's law constant: |
41.4 pa' m3/mol |
| Log Kow: |
8.8 |
| Flash point: |
> 200°C |
| Autoflammability: |
ca. 380°C |
| Viscosity: |
100-150 mPa's |
| Purity: |
DINP is a manufactured substance made by esterifying phthalic anhydride and isononanol. Isononanol is composed of different branched C9 alcohol isomers. |
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| Impurities: |
Isononanol ca. 0.04%, isononylbenzoate ca. 0.03%, n-butyl-isononyl phthalate ca. 0.1%, water 0.02-0.03%. |
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