Dioctyl terephthalate testing service

Dioctyl Terephthalate Testing Service for Global Plasticizer Compliance

As an ISO/IEC 17025 accredited laboratory, we deliver a specialized dioctyl terephthalate testing service that verifies the chemical purity, physical properties, thermal stability, and regulatory compliance of DOTP plasticizer used in PVC products, cables, flooring, automotive interiors, and food contact materials. Our dioctyl terephthalate testing service supports manufacturers and exporters who must demonstrate conformity to ASTM D3465, ISO 1385, EN 15777, EU Regulation 10/2011, REACH, and regional plasticizer standards across the European Union, North America, East Asia, and the Middle East. Every test is performed under our CNAS-accredited quality system, producing reports accepted by notified bodies, PVC compounders, and procurement teams worldwide.

Product Samples We Regularly Test in Our Dioctyl Terephthalate Testing Service

Industrial-grade DOTP liquid plasticizer — for PVC wire and cable insulation, flooring, artificial leather, and general flexible PVC compounds
Food-contact-grade dioctyl terephthalate — for cling films, food packaging, gaskets, and kitchenware requiring compliance with EU and FDA migration limits
Automotive-grade DOTP plasticizer — for interior trim, dashboard skins, and low-fogging applications with strict emission requirements
High-purity and low-volatility DOTP grades — for premium flexible PVC products requiring long-term plasticizer retention
Recycled and reprocessed dioctyl terephthalate — for sustainability verification and secondary use qualification
Custom-blended and formulated DOTP plasticizer systems — with co-plasticizers, stabilizers, and processing aids for OEM compound requirements

Chemical Purity and Composition Analysis for Dioctyl Terephthalate

Purity and ester content determination by gas chromatography per ASTM D3465 and ISO 1385 — the dioctyl terephthalate sample is analyzed by GC-FID to quantify the DOTP content and to detect any isomeric impurities, unreacted terephthalic acid, or residual 2-ethylhexanol that would affect plasticizer performance and odor.
Acid value and free acidity per ASTM D1045 and ISO 2114 — the free acid content of the DOTP is measured by titration to verify the esterification reaction is complete and to prevent corrosion of processing equipment and degradation of PVC stabilizers.
Hydroxyl value and residual alcohol content per ASTM E222 — the residual 2-ethylhexanol is quantified to ensure the plasticizer meets the low-odor and low-volatility requirements for automotive and indoor applications.
Water content by Karl Fischer titration per ASTM E203 and ISO 760 — the moisture level in the dioctyl terephthalate is measured to prevent hydrolysis, haze formation, and processing defects in moisture-sensitive PVC compounds.
Trace metal and catalyst residue screening by ICP-OES per ASTM E3061 — the content of tin, titanium, antimony, and other catalyst metals is quantified to ensure the DOTP meets the purity requirements for food contact and high-clarity applications.
Color and appearance measurement per ASTM D1209 and ISO 2211 — the platinum-cobalt color scale and the visual clarity of the DOTP are measured to verify the plasticizer meets the specified color specification and does not cause yellowing of the finished PVC product.

Physical and Performance Property Testing for Dioctyl Terephthalate

Density and specific gravity per ASTM D4052 and ISO 2811 — the mass per unit volume of the dioctyl terephthalate is measured using a digital density meter to verify batch consistency and to support formulation calculations.
Viscosity and flow behavior per ASTM D445 and ISO 3104 — the kinematic viscosity of the DOTP is measured at defined temperatures to verify the specified flow characteristics for plasticizer handling, pumping, and dosing systems.
Refractive index per ISO 489 and ASTM D1218 — the refractive index is measured as a rapid identity and purity check for the dioctyl terephthalate plasticizer.
Flash point and fire point by Cleveland open cup per ASTM D92 — the temperature at which the DOTP vapors ignite is measured to verify safe handling, storage, and transport conditions for the plasticizer.
Volatility and plasticizer loss on heating per ASTM D2288 — the mass loss of the DOTP after exposure to elevated temperatures is measured to predict the long-term plasticizer retention and the fogging resistance of the finished PVC product.
Low-temperature flexibility and plasticizing efficiency per ASTM D1043 — the DOTP is incorporated into a standard PVC compound and the low-temperature flexibility is measured to verify the plasticizer provides the specified cold-flex performance for the application.

Thermal and Oxidative Stability Testing for Dioctyl Terephthalate

Thermogravimetric analysis for decomposition onset per ASTM E1131 — the mass loss profile of the DOTP is recorded under nitrogen and air to determine the thermal decomposition temperature and to verify the plasticizer remains stable during PVC processing at elevated temperatures.
Oxidative induction time per ASTM D3895 — the resistance of the dioctyl terephthalate to oxidative degradation is measured at elevated temperature, providing a sensitive indicator of the antioxidant package and the expected long-term stability of the plasticizer.
Heat aging and color stability per ASTM D3465 — the DOTP is aged in a ventilated oven and the change in color, acidity, and viscosity is recorded to predict the plasticizer's shelf life and its performance after prolonged heat exposure.
Thermal cycling and low-temperature storage stability per IEC 60068-2-14 — the plasticizer is cycled between hot and cold extremes to verify it remains homogeneous and free from crystallization or phase separation under temperature fluctuations.

Chemical Safety and Regulatory Compliance Testing for Dioctyl Terephthalate

Specific migration into food simulants per EU Regulation 10/2011 — the DOTP is tested with aqueous, acidic, alcoholic, and fatty food simulants under the intended use conditions, and the migrated DOTP concentration is quantified to verify compliance with the specific migration limit for food contact plastics.
Overall migration in food contact applications per EN 1186 — the total extractable mass from the DOTP-plasticized PVC is measured to ensure it meets the overall migration limit of 10 mg/dm² for food packaging and kitchenware.
REACH Annex XVII and SVHC screening — targeted analysis confirms the dioctyl terephthalate is free from restricted phthalates and that it does not contain Substances of Very High Concern above the regulatory thresholds.
RoHS compliance per IEC 62321 and EU Directive 2011/65/EU — quantitative screening for lead, mercury, cadmium, hexavalent chromium, PBBs, and PBDEs in the plasticizer and its packaging.
Volatile organic compound emission and fogging test per ISO 12219 and DIN 75201 — for automotive interior applications, the DOTP is tested for VOC emission and windshield fogging to verify compliance with vehicle interior air quality standards.
Heavy metals in packaging per EU Directive 94/62/EC — verification that lead, cadmium, mercury, and hexavalent chromium sum concentration in the drums, labels, and packaging is below the 100 ppm regulatory limit.

Report Recognition and ISO/IEC 17025 Compliance

Every test method described in this dioctyl terephthalate testing service is covered by our ISO/IEC 17025 scope of accreditation. Our technical reports and certificates of analysis are accepted by European notified bodies for food contact materials and chemical products, by North American PVC compounders and automotive OEMs referencing ASTM standards, and by customs and procurement authorities across the Middle East, Australia, and Asia. Whether you require a complete qualification dossier for a new DOTP plasticizer supplier, a batch release inspection for an export shipment, or a root cause failure analysis of a processing or performance issue, our laboratory provides the measurement accuracy and plasticizer chemistry expertise that the global PVC and polymer industries demand.