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(+)Choline Bitartrate

Product name: L(+)Choline Bitartrate
Structural formula: [HOCH2CH2N+(CH3)3]HC4H4O6-
Molecular formula: C9H19NO7
Molecular weight: 253.25
Properties: white crystalline powder , absorbing moisture easily
Edition: USP 26
Specification:

Item

USP 26

Identification A , B , C

Ok
Assay > %

99.7

As ≤%

0.0003

Heavy metals(as Pb ) ≤%

0.002

Pb ≤%

0.001

Residue on ignition ≤%

0.1

Moisture ≤%

0.5

PH

3.4 ~ 3.7

Optical rotation

+17.5 ~ +18.5

1,4-dioxan

Ok

Escherichia coli

no

salmonella

no

coliform

<300g

number of microzyme

<100g

Total number of bacteria

≤3000g

Appearance

white crystalline powder
Home

Home
About us

About us
Products

Products
>Contact us

Contact us