国产一区二区三区在线播放,成年人看的黄色高清无码,久久久久久人妻一区精品,被黑人强伦姧人妻完整版

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

Chemical Reagent Ammonium Bifluoride

Quality StandardGB/T 1278-1994

Molecular FormulaNH4HF2                             Molecular Weight57.05

Item

Index

A.R.

C.P.

Ammonium Bifluoride (NH4HF2)   w/%   ≥

98.0

97.0

Ignition residue(Sulfate) w/%   ≤

0.01

0.05

Chloride(Cl) w/%   ≤

0.001

0.005

Sulfate(以SO4計(jì))  w/%   ≤

0.005

0.01

Fluorosilicate(SIF6) w/%   ≤

0.2

0.5

Fe w/%   ≤

0.001

0.005

Heavy metal(Pb)  w/%   ≤

0.002

0.005

Properties
The product is a rhombohedra or flaky 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

亚洲av人人夜夜澡人人| 日韩久久无码免费毛片软件| 欧美性大战。久久久久久| 无码欧美多人性站交大战| 精品无码人妻一区二区三区不卡 | 精品人人妻人人澡人人爽牛牛| java强行videos另类| 和黑人做爰下边好大舒服| 在教室伦流澡到高潮hgl视频| 日本妇人成熟a片免费现看| 美女做爰a片毛片aaaa| 色综合久久精品中文字幕| 夜月直播视频直播免费观看| 成人综合伊人五月婷久久| 欧美性猛交xxxx免费看| 熟妇高潮喷沈阳45熟妇高潮喷| 国产在线观看国偷精品产拍| 色翁荡熄500篇| 99精品视频在线看17| 8050午夜免费级一片| 天天做天天爱天天综合网2021| 中华姓氏起源一览图| 亚洲中文字幕永久在线看| 色欲av亚洲情无码av蜜桃| 亚洲精品乱码久久久久久中文字幕| 糙汉lvl奶瘾古言| 亚洲精品无码高潮喷水在线| H无码精品视频在线观看| 久久久99精品| 97在线观视频免费观看| 在线视频中文字幕乱人伦| 香蕉欧美成人精品A∨在线观看 | 日韩精品久久久肉伦网站| 精品人妻av区乱码| 小妖精跪趴你好湿好紧好浪| 黄色的视频 久久久久久| 日本丰满熟妇VIDEOS| 国产精品久久av免费看| 欧美性大战久久久久xxx| 97最早青青草视频在线| 亚洲va久久噜噜噜久久|