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

久久国产精品偷| 欧洲精品99毛片免费高清观看| 欧美成人片一区二区三区| 两个人免费视频| 亚洲国产成人精品久久久久| 免费萌白酱国产一区二区三区| 无码精品黑人一区二区三区| 亚洲AV午夜成人片精品网站 | 欧美 亚洲 另类 偷偷 自拍| 亚洲熟妇色XXXXX欧美老妇| 欧美日韩亚洲精品瑜伽裤| 少妇极品熟妇人妻无码| 国产产无码乱码精品久久鸭| 欧美性69式xxxx护士| 亚洲∧v久久久无码精品| 人妻绿帽yin乱| 奶水h人妻销魂共妻高h| 人妻少妇征服沉沦| 欧美BBBWBBWBBWBBW| 乱人伦人妻中文字幕无码| 夜夜爽77777妓女免费看| 日韩av无码一区二区三区不卡 | 亚洲区小说区图片区QVOD| 免费观看丰满少妇做受| 秋霞在线看片无码免费| 熟妇女人妻丰满少妇中文字幕| 精品久久久久久777米琪桃花| 欧美精品一区二区少妇免费A片| 国产色爽免费无码视频| 无码一区二区三区不卡AV| 又大又粗又爽a级毛片免费看| 精品夜夜爽欧美毛片视频 | 日本va欧美va精品发布| 成人在色线视频在线观看免费社区 | 中文字幕无码他人妻味| 99精品人妻少妇一区二区| 久久精品亚洲av无码乱码三区| 久久99精品久久久久久水蜜桃| 在线播放免费人成毛片乱码| 大学生疯狂高潮呻吟免费视频| 免费看韩国黄a片在线观看|