久久爱综合久久爱久久爱,间谍过家家第二季在线观看免费,国产美女在线精品免费观看网址,欧美+日本+国产+在线观看

Welcome to Fujian Yongjing Technology Co., Ltd. the website!

Contact us

Add: 18#, Xin'An Road, Shaowu City, Fujian, China
International Trade Dept.
Tel: +86-599-6655932/6654968
Fax: +86-599-6654591
Home Trade Dept. 
Tel: +86-599-6654866/6654968
Fax: +86-599-6655755
High-purity Chemicals Dept.
Tel: +86-599-6655536/6654968
Fax: +86-599-6655755


Products

Industrial Ammonium Fluoride

Quality StandardGB28653-2012

Molecular FormulaNH4F                 Molecular Weight37.04

Item

Index

First grade

Qualified product

Ammonium Fluoride (NH4F) w/%  ≥

95.0

93.0

Free Acid(as HF) w/%  ≤

1.0

1.0

Ammonium fluosilicate[as(NH42SIF6]w/% ≤

0.5

1.0

 

Properties
The product is a white powdery crystal. It can deliquesce easily and dissolve easily in water. It can dissolve in alcohol slightly. It can be resolved when it is affected by the heat or it is in hot water. It can corrode glass. It’s poisonous.
Application
The product can be used for glass frosting or extracting rare elements and used as a preservative or a mordant.
Storage
Moisture-proof and sealed preservation is needed.
Transport
It should be treated as inorganic poisonous goods.
Packing
The product is packed in a 25kg polythene plastic bag. Also pack it on consumer requests.

【Back】

Copyright(C)2017,Fujian Yongjing Technology Co., Ltd. All Rights Reserved. Supported by ChemNet ChinaChemNet Toocle Copyright Notice

国产国拍亚洲精品AV在线| 欧美VPSWINDOWS| 日日av夜夜添久久奶无码| 免费视频完整版软件下载| 国产suv精品一区二区五| 99久久国产综合精品| 国产精品va在线播放我和闺蜜 | 99久久99久久精品国产片果冻 | 国产婷婷色一区二区三区在线| 国外精品视频在线观看免费| 歪歪漫画网免费版在线观看| 亚洲国产精品久久久久秋霞小| 久久夜色精品国产噜噜av| 欧美性猛交AAAA片黑人| 精品欧美一区二区三区成人片在线| 精品久久久久久综合日本| 亚洲av无码一区二区乱子仑| 久久久久亚洲AV无码A片| 亚洲色欲色欲www| 免费a级毛片| 久久精品国产亚洲AV麻豆色欲| 亚洲va中文字幕无码| 日韩一区二区三区精品| 国产精品伦一区二区三级视频| 精品欧美一区二区三区成人片在线| 国产精品亚洲AV人片| 无码AV免费一区二区三区试看| 欧美乱熟人妻色情影视| 成人免费一区二区三区视频软件 | freexx性黑人大战欧美视频| 国产成人猛男69精品视频| 欧美AV在线观看| 亚州日本乱码一区二区三区| 五月天激情国产综合婷婷婷| 午夜不卡久久精品无码免费| 无码精品久久久久久人妻中字| 国产精品久久久久久AV| 欧美 变态 另类 人妖| 无码免费一区二区三区| 亚洲AV无码一区二区三区网站| 99久久99这里只有免费费精品|