日韩 一区 在线,色香欲天天影视综合网,性欧美丰满熟妇XXXX性久久久,午夜视频国产在线观看

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

国产精品久久久久久久新郎| CHINESE国产AV巨作VIDEOS| 农场主儿女1984免费| 亚洲AV无码不卡私人影院| 久久久久久亚洲综合影院| 亚洲日韩国产一本视频| 岳的下面又大又黑又肥| 精品国产亚洲乱| 麻豆第一区MV免费观看网站| 在厨房我撕开岳的丁字裤| 成在人线AV无码免费高潮水| 久久A级毛片免费观看| 亚洲高清久久久久久| 久久久久久AV无码免费网站| 九九精品99久久久香蕉| 精品国产一区二区三区AV性色| 原来是电影神马在线观看| 中文日韩精品一区二区三区| 国产普通话对白刺激| 日本护士高潮叫床声| 国自产在线精品一本无码中文| 少妇特殊按摩高潮惨叫无码| 我的初次内射欧美成人影视| 国产精品亚洲一区二区在线观看 | 善良的闺蜜韩国三级3| 欧美人妻精品一区二区三区| 中文在线а天堂中文在线新版| 黄瓜视频下载| ...91久久精品一区二区三区| 国产精品福利自产拍久久| 再深点灬舒服灬太大了添视频| 色欲狠狠躁天天躁无码中文字幕| 无码AV免费精品一区二区三区| 精品久久久久久综合日本| 国产精品一区二区久久精品| 日韩精品一区二区亚洲AV| 综合欧美日韩国产成人| xfplay宣宣理论片先锋影音| 日本一区二区在线播放| 国语对白男女一级毛片免费| 天堂AV男人在线播放|