中文名称：外消旋聚乳酸，聚DL-丙交酯，聚DL-乳酸，DL-聚乳酸

英文名称：Poly(DL-lactide)，Poly（DL-lactic acid），DL-polylactide                      

化学式：(C₆H₈O₄)_n                         

CAS登录号：26023-30-3

应用说明：外消旋聚乳酸（PDLLA）是一种生物可吸收降解材料。可用于医学领域，如一次性输液用具、免拆型手术缝合线；药物控释、缓释包装剂；组织工程支架、骨固定及骨修复材料、注射用微胶囊、微球、埋植剂及动物器官支撑弹性体等材料.

项目                                                               质量指标

外观                                                               白色粉末或颗粒

粘均分子量                                                     0.6-100万

特性粘度                                                        0.3-11dL/g

旋光度（氯仿）                                     -10°—+10°

玻璃化温度                                                     45℃—55℃

熔点                                                              无定形

残留单体                                                       ＜1%

残留溶剂                                                       ＜0.5%

重金属                                                          ＜10 ppm

锡（催化剂）                                                ＜200 ppm

密度：                                                          1.2-1.3 g/cm³

硫酸盐灰分                                                   ＜0.1%