强乱强乱中文字幕,国产精品日韩 欧美 一区二区,午夜福利在线视频性色,亚洲国产看片在线观看

1.Product Name：Pyromellitic dianhydride(PMDA)

2.CAS NO.:89-32-7

3. Structural Formula: 

4. Molecular Formula: C₁₀H₂O₆ 

5. Quality indexes:

6.PACKING AND RESERVATION
External Package is plastic barrel or Fiber Drum (or use iron barrel according to customer's request), 20-200kg/barrel. Internal Package is polyethylene cuticle bag, Store in shady and dry place,and keep off heart sourc
e