Esters Available — Bulk Only

Diisononyl Phthalate (DINP)

CAS 28553-12-0 · Formula C26H42O4 · MW 418.6 g/mol

A high-volume PVC plasticizer that delivers durable flexibility to flexible-vinyl goods. It is used primarily to soften polyvinyl chloride and flexible vinyls, imparting flexibility to products such as wire and cable, flooring, and coated fabrics.

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HS Code
2917.33
At a Glance
Material Family
Esters
Record Type
Pure compound
Primary Role
Lubrication · Plasticizing
Functional Roles
Lubrication Plasticizing
INCI Name
DIISONONYL PHTHALATE
CosIng Functions
ANTICAKING
Industries Served
Beauty & Personal Care Plastics & Polymers
Applications & Use Cases
  • ▸ PVC plasticizer: General-purpose plasticizer for PVC and flexible vinyls.
  • ▸ Wire and cable: Flexibility for cable insulation and jacketing.
  • ▸ Coated fabrics: Plasticizer for vinyl-coated fabrics and flooring.
  • ▸ Plastisols: Plasticizer in plastisols and adhesives.
  • ▸ Coatings: Plasticizer in nitrocellulose lacquer coatings.
Physical Properties
Physical Description
Di-isononyl phthalate is an oily colorless liquid with a slight ester odor. Denser than water. Insoluble in water
Appearance
Colorless liquid
Boiling Point
78 °C at 760 mmHg
Melting Point
-48 °C
Flash Point
> 93 °C
Solubility
Soluble in acetone, methanol, benzene, ethyl ether
Density
Relative density (water = 1): 0.98
Vapor Pressure
Vapor pressure, Pa at 20 °C:
LogP
8.8
Autoignition Temperature
380 °C
Viscosity
500 cST at 0 °C; 102 cST at 20 °C; 37 cSt at 37.8 °C; 6 cSt at 100 °C
Refractive Index
Index of refraction: 1.486 at 20 °C/D
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2917 . 33
Chapter 29
Organic chemicals
Heading 29.17
Internationally harmonized (WCO HS)
Subheading 2917.33
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
28553-12-0
Molecular Formula
C26H42O4
Molecular Weight
418.6 g/mol
IUPAC Name
bis(7-methyloctyl) benzene-1,2-dicarboxylate
INCI Name
DIISONONYL PHTHALATE
PubChem CID
590836
InChI Key
HBGGXOJOCNVPFY-UHFFFAOYSA-N
Synonyms & Trade Names
DIISONONYL PHTHALATE Diisononylphthalate DINP bis(7-methyloctyl) benzene-1,2-dicarboxylate Enj 2065 Sansocizer DINP Vestinol NN Jayflex DINP Vestinol 9 Phthalisocizer DINP 1,2-Benzenedicarboxylic acid, diisononyl ester Baylectrol 4200 di-isononyl phthalate Witamol 150 Phthalic acid, diisononyl ester Di-''isononyl'' phthalate DIACIZER DINP MONOCIZER DINP PALATINOL DINP PLASTOMOLL DINP
Full Description

Diisononyl phthalate (DINP, CAS 28553-12-0) is a general-purpose ortho-phthalate ester plasticizer. It is used primarily to soften polyvinyl chloride and flexible vinyls, imparting flexibility to products such as wire and cable, flooring, and coated fabrics. It is also used in adhesives, plastisols, and nitrocellulose lacquer coatings.

Frequently Asked Questions

What is diisononyl phthalate (DINP) used for?

DINP (CAS 28553-12-0) is a general-purpose ortho-phthalate ester plasticizer. It is used primarily to soften polyvinyl chloride and flexible vinyls in products such as wire and cable insulation, flooring, and coated fabrics. It also serves as a plasticizer in plastisols, adhesives, and nitrocellulose lacquer coatings.

What is the CAS number and molecular formula of DINP?

Diisononyl phthalate has CAS number 28553-12-0 and molecular formula C26H42O4. It belongs to the ester family of plasticizers. A CoA referencing this CAS ships with every bulk lot.

Is DINP the same as DEHP?

No. DINP (CAS 28553-12-0) and DEHP are distinct ortho-phthalate esters with different alcohol chains and different CAS numbers. DINP is a higher-molecular-weight general-purpose plasticizer often specified where a C9-branched phthalate is required rather than DEHP.

What HS code does DINP ship under?

DINP is classified under HS heading 2917.33. Confirm the destination-country tariff line and any import documentation with your customs broker before shipment.

How is bulk DINP packaged and priced?

RawSource supplies DINP in drums, totes, and IBCs for PVC, plastisol, and coatings manufacturers. Pricing is quote-based and tied to volume and packaging; request a current bulk quote with your target grade and quantity.

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Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.

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