国产三级不卡在线播放_欧美日韩精品系列c_无码av在线一本无码_无遮无挡免费真人裸交视频_极品丰满翘臀后进啪啪_一二三四视频免费观看中文版1_亚洲第一区在线播放_日韩不卡在线播放_日本熟妇浓毛hdsex_中文字幕日韩久久综合影院

Traits: colorless tetragonal crystals or white crystalline powder
Relative density: 4.174
Solubility: soluble in water, sulfuric acid, nitric acid and acetic acid, insoluble in alcohol
For pharmaceutical intermediates and health products