A polyvinyl resin used extensively in the manufacture of plastics, including medical devices, tubing, and other packaging. It is also used as a rubber substitute. References: Featherstone PJ, Ball CM, Westhorpe RN. The evolution of the polyvinyl chloride endotracheal tube. Anaesth Intensive Care. 2015 Jul;43(4):435-6. PubMed PMID: 26099776.

纯度：≥98%

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