Jining Wansheng Environmental Materials Co., Ltd., a wholly-owned subsidiary of Shandong Changxing Plastic Additives Co., Ltd., offers three DOTP product grades: Superior DOTP, First-Grade DOTP and Qualified DOTP. PVC buyers don't all need the same spec, so the line is split three ways: premium consumer products, general industrial applications, and cost-driven volume use.
All three grades are produced at Wansheng's plasticizer facility in Wenshang Chemical Industrial Park, Jining City, Shandong Province, which currently operates 80,000 tonnes/year from Phase I. A 100,000 tonnes/year Phase II expansion is under construction; it is being built to produce the same three grades to the same specifications, so once commissioned, material from either phase will behave the same way on your line.
Grade Overview: Superior, First-Grade and Qualified DOTP
Superior and First-Grade differ only in colour specification (APHA ≤150 vs APHA ≤230). Qualified keeps the same ester content, acid value, flash point, water content and density as the other two, widens colour to APHA ≤450, and steps down one order of magnitude in volume resistivity:
Product Grade Quick Reference
| Grade | Color (APHA) | Best for | Compliance |
|---|---|---|---|
| First-Grade DOTP | ≤230 | Cables, flooring, artificial leather, industrial films, other general-purpose PVC applications | Non-phthalate, REACH, RoHS, CPSIA |
| Superior DOTP | ≤150 | Food-contact packaging, medical devices, children's products, premium consumer goods | Non-phthalate, REACH, RoHS, CPSIA, EN 71-3 |
| Qualified DOTP | ≤450 | Cable jackets, mat backing, dark or filled compounds, cost-driven general PVC where colour is not part of the sale | Non-phthalate, REACH, RoHS |
All three grades are produced under ISO 9001, ISO 14001, ISO 45001, and ISO 50001 certified management systems. Superior and First-Grade share the same volume resistivity specification; Qualified sits one order of magnitude lower.
Color specification (APHA) is a critical quality indicator for DOTP. Lower APHA values indicate higher purity and better appearance in finished PVC products. First-Grade DOTP at APHA ≤230 handles the majority of industrial applications. Superior DOTP at APHA ≤150 is for the harder cases, where colour and regulatory status are part of the purchase spec. Qualified DOTP at APHA ≤450 covers volume applications where the finished part is dark, filled, or hidden — and where a lower volume resistivity is acceptable.
First-Grade DOTP: Optimized for General Industrial Applications
First-Grade DOTP is Wansheng's workhorse product, designed for the broadest range of PVC applications:
- Cable and wire insulation: Reliable plasticization, good electrical properties, and lower cost.
- PVC flooring and artificial leather: Softness, durability, and processing stability that hold from batch to batch.
- Industrial films and sheets: Good transparency, flexibility, and heat resistance for general-purpose use.
- Profiles and pipe fittings: Easy to process, with long service life in rigid and semi-rigid PVC.
First-Grade DOTP is the value option. Where ultra-low color isn't a hard requirement, you get the same DOTP benefits (phthalate-free compliance, good migration resistance, solid durability) at a lower price.
Superior DOTP: The Premium Tier
Superior DOTP is the top grade in Wansheng's line, at APHA ≤150:
- Food-contact packaging films: Meets the most stringent purity requirements for direct and indirect food contact.
- Medical devices and tubing: Ultra-low impurities and consistent quality for regulated medical applications.
- Children's products and toys: Full compliance with EN 71-3, CPSIA, and other toy safety regulations.
- Premium consumer goods: Strong appearance, clarity, and long-term stability.
All three grades are independently verified by third-party laboratories. Our published SGS test results cover phthalate-free screening, EN 71-3 element migration, and PFAS-free verification for customer review.
The tighter tolerances on Superior DOTP keep batch-to-batch performance steady in demanding uses. If quality, appearance, or regulatory compliance leaves you no wiggle room, this is the grade to qualify.
Qualified DOTP: The Cost-Effective Tier
Qualified DOTP is the volume grade. It keeps the same ester content, acid value, flash point, water content and density as First-Grade and Superior, so loading and processing behaviour carry over. What changes is colour (APHA ≤450) and volume resistivity, which is one order of magnitude below the other two grades.
- Cable jackets and sheathing: Dark or filled compounds where jacket colour is not a selling point.
- Mat backing and filled compounds: Applications that already carry filler or pigment and do not need a water-clear base.
- Cost-driven general PVC: Parts where the plasticizer is bought on price per tonne, not on appearance.
Do not specify Qualified DOTP for insulation compounds, food contact, medical parts or toy applications. Those need the tighter colour and the higher resistivity of First-Grade or Superior, and the price difference is small next to the cost of a failed batch.
Phase II Expansion: Same Grades, Same Standards
Wansheng Phase II expansion project is under construction. When commissioned, it will add 100,000 tonnes/year of plasticizer capacity on top of Phase I's 80,000 tonnes/year, bringing Wansheng to 180,000 tonnes per year upon full completion. Commissioning is planned for May 2027.
The Phase II expansion is being built to produce all three grades to identical specifications as the current Wansheng plant. In practice this means:
- Identical colour specifications (APHA ≤150 Superior, ≤230 First-Grade, ≤450 Qualified)
- Identical purity and performance characteristics
- Identical quality management systems (ISO 9001/14001/45001/50001)
- Identical regulatory compliance (REACH, RoHS, CPSIA, EN 71-3)
For buyers, this eliminates the need to re-qualify products from the expanded facility. A qualification based on Wansheng production automatically applies to both phases, simplifying procurement and reducing supply chain risk.
How to Choose the Right Grade for Your Application
Which grade fits depends on the job:
Choose First-Grade DOTP if: Your application is a general industrial product (cables, flooring, artificial leather, industrial films) where ultra-low color is not critical and price matters.
Choose Superior DOTP if: Your application involves food contact, medical use, children's products, or premium consumer goods, where appearance, purity, and compliance decide the sale.
Choose Qualified DOTP if: The finished part is a dark or filled compound — cable jackets, mat backing, hidden or pigmented PVC — where colour is not part of the sale and the lower volume resistivity is acceptable.
All three grades are available for sampling and technical evaluation. Contact our sales team to request samples, technical data sheets, and pricing.
Frequently Asked Questions About Wansheng DOTP Grades
What are the three DOTP product grades offered by Wansheng?
Wansheng offers three DOTP product grades: Superior DOTP (APHA ≤150), First-Grade DOTP (APHA ≤230) and Qualified DOTP (APHA ≤450). All three share the same ester content, acid value, flash point, water content and density. Superior and First-Grade differ only in colour; Qualified widens colour and steps down one order of magnitude in volume resistivity.
What is the difference between Superior, First-Grade and Qualified DOTP?
Superior and First-Grade differ only in colour: APHA ≤150 versus APHA ≤230, for premium and general industrial PVC respectively. Qualified has a wider colour of APHA ≤450 and a volume resistivity one order of magnitude lower, which suits cable jackets, mat backing and other dark or filled compounds where colour is not part of the sale.
Will the Wansheng Phase II expansion factory produce the same grades?
Yes. The Wansheng Phase II expansion is under construction and is being built to produce all three DOTP grades — Superior, First-Grade and Qualified — to identical specifications and quality standards as Phase I. Once commissioned, product from either facility will meet the same spec.
Which grade should I choose for my application?
For general-purpose PVC applications such as cable insulation, flooring, artificial leather, and industrial films, First-Grade DOTP does the job at a lower price. For applications requiring superior colour, purity, and regulatory compliance (such as food-contact packaging, medical devices, children's products, and premium consumer goods), Superior DOTP is recommended. For dark or filled compounds such as cable jackets and mat backing, where colour is not part of the sale, Qualified DOTP is the cost-effective choice.
Are all three grades phthalate-free and compliant with international regulations?
Yes. Superior, First-Grade and Qualified DOTP are all non-phthalate plasticizers compliant with REACH, RoHS, CPSIA, and other international regulations. All three grades are produced under ISO 9001, ISO 14001, ISO 45001, and ISO 50001 certified management systems.
Can I request samples of all three grades?
Yes. Free samples of Superior, First-Grade and Qualified DOTP are available. Contact our sales team to request samples and technical data sheets for evaluation.
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Shandong Changxing Plastic Additives Co., Ltd. is an ISO 9001 certified manufacturer with 230,000 tonnes of annual plasticizer capacity upon full completion. We supply DOTP, DCP, and 2-octanol to clients worldwide.
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