Shandong Lanhe Chemical Co.,Ltd
SHANGHAI LANHECHEM NEW MATERIAL CO.,LTD

Dioctyl Terephthalate (DOTP)

Non-Phthalate PVC Plasticizer Supplier

DOTP (also known as DEHT, CAS No. 6422-86-2) is a high-performance non-phthalate plasticizer. It is the diester of terephthalic acid and branched-chain 2-ethylhexanol — an alcohol often referred to generically as octyl. This colorless viscous liquid effectively softens PVC plastics and shares close chemical similarities with general-purpose phthalates such as DEHP and DINP. Unlike those traditional phthalates, however, it faces no negative regulatory pressure. Furthermore, it exhibits excellent plasticizing properties and can directly replace DEHP and DINP in a wide range of applications.

DOTP
Main Produts

Technical Specifications

Property	Typical Value	Test Method
CAS No.	6422-86-2	—
Molecular Formula	C₂₄H₃₈O₄	—
Molecular Weight	390.56 g/mol	—
Appearance	Clear, colorless oily liquid	Transparent liquid
Ester Content (Purity)	≥ 99.5%	GC / ASTM D3465
Color (Pt-Co, APHA)	≤ 30	ASTM D1209
Acid Value	≤ 0.05–0.1 mg KOH/g	ASTM D1045
Water Content	≤ 0.05–0.1%	Karl Fischer
Density @ 20°C	0.981–0.987 g/cm³	ASTM D4052
Flash Point	≥ 210 °C	ASTM D93
Refractive Index	1.483–1.489	ASTM D1045
Volume Resistivity	≥ 1×10¹² Ω・cm	—

Download

Package and storage

Packaging Form	Specification/Capacity
Galvanized Iron Barrel/Steel Drum	180-200 liters/drum
Plastic Barrel (PE)	25L/drum, 50 liters/drum
Tank Container (ISO Tank)	20-30 tons/container
Cardboard Drum with Plastic Liner	25-50 kg/drum

Features of DOTP

Stable

Plastisol viscosity is more stable and remains stable for extended storage. Depending on this it gives uniform thicker products.

Low Migration

It has a different structure than phthalic-based plasticizers. As a result of this, migration is lower. The materials, which are made with DOTP, are more resistant. Because of lower migration, materials does not stick to lacquered surfaces.

Flexibility

Due to its linear structure, it has better low-temperature flexibility. This decreases plastics’ fragility at lower temperatures. Due to DOTP’s lower volatility, you can use DOTP instead of DINP and DIDP.

Safe

DOTP is a general-purpose plasticizer considered safer than ortho-phthalate plasticizers due to its excellent toxicological profile. It has uses in applications like extrusion, calendaring, injection molding, rotational molding, dip molding, slush molding, and coating.

Applications of DOTP

Flexible PVC Products

Dioctyl terephthalate (DOTP) is primarily used as a plasticizer for PVC, and as a replacement for ortho-phthalates in a wide range of applications. These include films, sheets, cables, and flooring materials. It imparts flexibility, durability, and resistance to heat and weathering to PVC.

Automotive Interiors

In the automotive industry, DOTP is utilized as a plasticizer for PVC-based materials used in vehicle interiors. This includes the manufacturing of car seat covers, dashboards, and other flexible components.

Wire and Cable Insulation

DOTP is commonly employed in the production of PVC-based wire and cable insulation. Its flexibility and thermal stability make it suitable for applications where these properties are crucial, such as in electrical wiring.

Medical Devices

DOTP is used in the production of medical devices made from flexible PVC, ensuring that the materials meet the necessary flexibility and safety requirements for medical applications.

Toys and Recreational Products

Flexible PVC formulations with DOTP find use in the manufacturing of toys, inflatables, and other recreational products. It helps provide the desired flexibility and durability for these items.

Packaging Films

DOTP is employed in the production of flexible PVC films used for packaging applications. These films benefit from the plasticizing properties of DOTP, allowing for easier processing and improved film properties.

Industrial Applications

DOTP is utilized in various industrial applications where a flexible and durable PVC material is required, such as in conveyor belts, gaskets, and hoses.

Textiles

In the textile industry, DOTP can be used as a plasticizer for PVC-coated fabrics, ensuring flexibility and durability in applications like tarpaulins and banners.

Factory show