中文字幕在线永久视频,宅男噜66免费看网站,一区二区日韩精品中文字幕,日韩精品一区二区三区小说,制服丝袜天堂网,国产成人综合手机在线播放,国产情侣在线播放

1.Product Name：Pyromellitic acid (PMA) 

2.CAS NO.89-05-4

3. Structural Formula: 

4. Molecular Formula: C₁₀H₆O₈ 

5. Quality indexes:

6. Packing and storageinternal:

Plastic, external woven bag ( according to the specific demand of customers); net weight is 25kg/bag,800kg/bag,stored in dry, cool place away from the heat source.