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Aslan Medical PVC formulations need to satisfy strict standards for flexibility, transparency, and chemical stability. They must also ensure tight extractables/leachables control. Because of these factors, device manufacturers should look beyond hardness alone when they choose a plasticizer. Instead, this selection process needs to focus on flexibility, permanence, and migration. Furthermore, it is vital to evaluate processing performance and specific regulatory requirements for each application.
At Yuanyide, we manufacture plasticizers including DOTP, DPHP, TOTM, DOA, DOS, and other options for flexible PVC applications. Our plasticizers are used in a wide range of flexible PVC applications, including films, cables, artificial leather, hoses, and selected medical-device applications. When discussing medical PVC, however, we recommend evaluating each plasticizer according to the intended device, contact conditions, operating temperature, migration requirements, and complete formulation rather than assuming that one grade fits every application.
In medical PVC, “medical grade” should not be understood as a single global plasticizer certification based only on purity or conventional TDS specifications. A plasticizer may meet tight chemical specifications and still require further qualification for a specific medical device. Selection should consider chemical composition, impurities, extractables and leachables, toxicological risk, biological evaluation, sterilization, contact type, contact duration, and the intended clinical use of the finished device.
Medical-grade PVC producers typically require stricter control over the consistency of their raw materials than other flexible PVC products. Factors such as changes to the purity, moisture content, color, acidity, and other material characteristics can affect processing and final product performance.
For example, Yuanyide DOTP has a specified ester content of at least 99.5%, while its reported test result is 99.7%. Its specification also includes controls for color, acid value, water content, flash point, and volume resistivity. Such data are useful for incoming-material evaluation, but they are only one part of a medical PVC qualification program.
For medical PVC, plasticizer selection should therefore go beyond conventional migration testing. Chemical characterization can include identification and, where necessary, quantification of plasticizers, residual raw materials, additives, processing-related substances, extractables, and leachables. ISO 10993-18 provides a framework for this type of chemical characterization within the biological risk-management process.
Conventional external plasticizers are physically incorporated into the PVC matrix rather than covalently bonded to the polymer backbone. For applications where tubing or another device contacts fluids, manufacturers therefore need to consider whether formulation components can migrate or be extracted under actual use conditions.
Biological evaluation of a medical PVC device should be based on the nature and duration of patient contact rather than on the plasticizer alone. The evaluation strategy may differ depending on whether the device contacts intact skin, tissue, circulating blood, or other body fluids, as well as how long that contact occurs.
Contact duration is commonly considered in categories such as limited exposure of 24 hours or less, prolonged exposure of more than 24 hours up to 30 days, and long-term exposure exceeding 30 days. Depending on the device category and identified risks, the biological evaluation may consider endpoints such as cytotoxicity, sensitization, irritation, systemic toxicity, genotoxicity, or hemocompatibility.
For this reason, supplier specifications and plasticizer-level data can support material screening, but they should not be treated as a substitute for the biological evaluation of the finished PVC device under its intended conditions of use.
| Contact Duration | Contact-duration category (source/version) |
| ≤24 hours | Limited |
| >24 hours to 30 days | Prolonged |
| Long-term | Long-term / Permanent |
| Market | Key Framework | What It Means for PVC Plasticizers |
| United States | FDA + ISO 10993 series | Evaluate biological safety according to contact type, duration, material chemistry and patient exposure. FDA currently partially recognizes ISO 10993-1:2025 and ISO 10993-17:2023, and recognizes ISO 10993-18:2020/Amd 1:2022 in part. |
| European Union | EU MDR 2017/745 Annex I 10.4 | Certain CMR 1A/1B or endocrine-disrupting substances above 0.1% w/w in specified invasive, administration, transport or storage applications require justification; labeling requirements can also apply. |
| China | GB/T 16886 series | Biological evaluation and chemical characterization should be incorporated into medical-device risk management; GB/T 16886.1-2022 and GB/T 16886.18-2022 are currently applicable. |
| Japan | ISO 10993-1 / JIS T 0993-1 approach | PMDA guidance requires biological safety evaluation for devices/components that directly or indirectly contact the human body. |
Extractables refer to specific compounds that leak out from a material or device during controlled lab tests. These tests usually involve harsh solvents, high heat, or long periods of contact to pull these elements out. On the other hand, Leachables are the chemicals that move from the completed product into a real or modeled medical setting. When dealing with medical PVC, the entire recipe is vital. This is because the PVC resin, plasticizer, stabilizers, and lubricants all play a role. Additionally, processing aids and specific manufacturing conditions can change the final chemical makeup of the medical tool.
Evaluating migration risk is not as simple as looking at the plasticizer name. Producers need to look at several key factors when they build a solid test plan. These include the contacting media, contact duration, and temperature. They must also check the surface-area-to-volume ratio, sterilization history, and storage conditions. While a plasticizer with lower migration can be a useful formulation objective, migration performance alone does not establish biological safety. Identified or quantified constituents may need to be evaluated against patient exposure and toxicological information as part of the biological risk assessment.
Transparent tubing can make it easier to observe fluid flow, bubbles, contamination, or blockage. Plasticizer compatibility and initial color therefore deserve attention.
Yuanyide DEHCH may be screened for clear PVC formulations when transparency, initial color, migration resistance, and plasticization efficiency are important formulation targets. Yuanyide’s published product information describes DEHCH for PVC applications including medical devices, but device-specific medical suitability should still be established through the required chemical characterization, toxicological assessment, biological evaluation, and finished-device validation.
Low-temperature exposure can make flexible PVC harder or more brittle. Yuanyide DOA is positioned as a cold-resistant plasticizer with strong low-temperature flexibility, while DOS may be considered when low-temperature flexibility is a key formulation requirement. Their suitability for a specific medical-device application must be confirmed through the applicable regulatory, biocompatibility, and chemical-characterization requirements.
Where thermal aging and permanence become more important, Yuanyide TOTM provides an alternative formulation approach when thermal stability, low volatility, and permanence are prioritized.
| Plasticizer | Formulation Reason to Evaluate | Medical Qualification Still Needed |
| DEHCH | Transparency, initial color, migration resistance, PVC compatibility | Composition disclosure, E&L evaluation, toxicological assessment, applicable biological evaluation |
| DOTP | Balanced plasticization, permanence, migration/extraction resistance | Same device-specific chemical and biological qualification |
| TOTM | Low volatility and permanence for demanding thermal/service conditions | E&L profile after processing/sterilization and device-specific evaluation |
| DOA | Low-temperature flexibility | Migration/extraction behavior and complete medical-device qualification |
| DOS | Low-temperature flexibility and relatively low volatility | Same device-specific chemical and biological qualification |
Purchasers should begin with the current Technical Data Sheet and Safety Data Sheet and request batch-specific quality information such as a Certificate of Analysis when available. Specifications for purity, color, acid value, moisture, density, and other controlled properties help buyers compare incoming batches against agreed requirements.
For sensitive projects, manufacturers can ask whether the supplier has additional compositional, migration, or extractables-related information available. If such data are unavailable, the device manufacturer should define the testing needed for its own formulation and regulatory pathway.
Buyers should also discuss batch consistency, specification limits, traceability, and supplier change-notification procedures. These factors can matter when a PVC formulation has already been validated.
TDS values describe a plasticizer, not the final PVC device. Resin grade, stabilizer system, plasticizer loading, processing temperature, tubing dimensions, and other additives can change migration, hardness, transparency, and mechanical behavior.
Testing should, where appropriate, reflect the intended use environment, including contacting media, contact duration, temperature, sterilization conditions, and storage conditions.
A formulation that performs well before extrusion may exhibit different properties after thermal processing, sterilization, storage, or fluid exposure. Post-processing and post-aging evaluation provides a more realistic basis for material selection.
Yuanyide provides sample-order support as well as R&D, consultation, and technical guidance services, allowing customers to compare candidate plasticizers before committing to full-scale purchasing.
Selecting plasticizers for medical PVC requires a balance of migration control, transparency, flexibility, thermal performance, documentation, and formulation consistency. Yuanyide DEHCH, DOTP, TOTM, DOA, and DOS address different parts of that performance spectrum, from optical clarity and balanced plasticization to heat resistance and low-temperature flexibility.
The appropriate choice ultimately depends on the finished device and its actual conditions of use. Supplier data can narrow the shortlist, but complete PVC formulation and device-level validation should determine the final decision.
Contact Yuanyide to discuss plasticizers for medical PVC tubing and request samples for formulation and application testing.
A: Tubing often stays in contact with various liquids during set periods and at certain temperatures. Since some parts of the material formula might move or leak out, makers must check for chemical exposure when they look at the safety of a finished device. They should not just depend on the basic details of the raw materials alone.
A: Yuanyide lists DOTP for PVC applications including medical devices and describes it as having good compatibility, low volatility, migration resistance, and extraction resistance. However, whether it is suitable for a particular tubing product depends on the full formulation and required device testing.
A: Buyers should request current TDS and SDS documents, batch-specific quality information such as a COA when available, relevant substance or regulatory reports, and any available compositional or extractables information required for their qualification process.
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