阳茎伸入女人阳道视频免费,欧美老肥婆牲交videos,十八禁男女猛烈拍拍拍无遮挡,亚洲中文字幕av无码专区,波多野结衣叫声最爽的一部,动漫美女h黄动漫在线观看,国产精品_国产精品_k频道,精品午夜福利在线视在亚洲,好男人视频社区在线观看www,又粗又大又黄的少妇毛片

Hotline: +86-571-82225795

Products

L-Cystine

CAS No.: 56-89-3
Molecule Formula: C6H12N2O4S2
Molecule Weight: 240.30
Structure Formula:
 
Description: White crystals or crystalline powder; almost insoluble in water, practically insoluble in ethanol and in ether.
Manufacture Standards: AJI92/EP5
Specification:

Specific rotation
-215 - -225
Heavy metals
≤10ppm
Water content
≤0.20%
Residue on ignition
≤0.10%
assay
98.5-101.0%
pH
5.0-6.5

Mainly uses:Used in food additive, medicine and cosmetic etc.
Packing:25kgs/ fiber drum.

Home

Home

About us

About us

Products

Products

>Contact us

Contact us