Medium Chain Chlorinated Paraffin

Understanding the Safety and Superiority of DINP and DOTP Over DOP in Plasticizers


DOP, a widely used ortho phthalate plasticizer for PVC, is facing declining usage due to health concerns and restrictions in food packaging and healthcare applications. To address these issues, efforts have been made to develop alternative phthalate plasticizers with similar efficacy to DOP but without its associated toxicity.

Ortho-phthalates and Environmental Concerns:

Ortho-phthalates, including DBP, DOP, and DTDP, are categorized into low molecular weight (LMW) and high molecular weight (HMW) groups based on their molecular structure and applications. DEHP (DOP) falls under the LMW ortho-phthalate category and is classified as a concern for health and environmental effects.

On the other hand, DINP and DIDP belong to the HMW ortho-phthalate category, avoiding health and environmental classifications.

Understanding DINP and DOTP as DOP Alternatives:

DINP (Di-Iso-Nonyl Phthalate) and DOTP (Di octyl terephthalate) are efficient plasticizers that mimic the softening effect of DOP. Despite being phthalates, they are considered safe for use unlike DOP due to their chemical structure.

Chemical Structure Distinctions:

The key distinction lies in their chemical structure. DOP and DINP are ortho-phthalates, while DOTP is a para-phthalate. The arrangement of ester radicals in DINP occupies more space, reducing migration from PVC products and minimizing environmental accumulation. DOTP, with branched and spatially arranged ester radicals, further prevents migration and environmental enrichment.

DOTP Advantages and Applications:

DOTP, a nearly colorless, low viscosity liquid, exhibits excellent heat and cold resistance, low volatility, resistance to extraction, and electrical insulation properties. Its versatility extends to applications in cables, acrylonitrile derivatives, polyvinyl butyral, nitrile rubber, synthetic rubber, and various coatings and films.

The Role of Suntek CPW in Cost-Efficient Production:

Suntek CPW, recognized as Suntek Suryaffin, exhibits promise as a secondary plasticizer additive. When combined with DOTP, it has the potential to enhance the cost-effectiveness of production processes, making it an attractive option for manufacturers seeking optimized production costs without compromising on product quality.


In summary, DINP and DOTP, as safer alternatives to DOP, showcase remarkable safety and efficiency due to their distinct chemical structures. DOTP, in particular, proves to be a superior replacement for DOP, offering enhanced properties and broad versatility in multiple applications. At Suntek, we recognize the importance of safe and effective plasticizers like DINP and DOTP in the evolving industry landscape.

With Suntek Suryaffin, we present an exciting opportunity to augment production efficiency when used as a secondary plasticizer additive with DOTP. The compatibility and interplay of these substances contribute to advancing sustainable practices within the plasticizer industry. At Suntek, we remain committed to promoting innovative solutions that align with industry demands and drive positive change.

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