久久在这里有精彩视频-激情综合五月婷婷久久-亚洲欧美高清国产精品-亚洲天堂成人在线一区

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

Reagent Ammonium Fluoride

Quality StandardGB/T 1276-1999

Molecular FormulaNH4F                Molecular Weight37.04

Item

Index

G.R.

A.R.

C.P.

Ammonium Fluoride (NH4F) %  ≥

96.0

96.0

95.0

Clarify Degrees Test

qualified

qualified

qualified

Ignition Residue(Express as SO4) %   ≤

0.005

0.02

0.05

Free Acid(Express as NH4HF2) %   ≤

0.2

0.5

1.0

Free Alkali

qualified

qualified

qualified

Chloride(Cl) %   ≤

0.0005

0.005

0.01

Sulfate(Express as SO4) %  ≤

0.005

0.01

0.02

Fluosilicate %  ≤

0.08

0.30

0.60

Fe  %  ≤

0.0005

0.002

0.004

Heavy metal(Express as Pb) %  ≤

0.0005

0.001

0.002

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 10kg or 20kg 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

日本午夜免费观看视频| 冬爱琴音一区二区中文字幕| 我想看亚洲一级黄色录像| 日韩免费av一区二区三区| 好吊色免费在线观看视频| 99久久精品国产麻豆| 香蕉网尹人综合在线观看| 亚洲熟女熟妇乱色一区| 欧美人妻盗摄日韩偷拍| 国产女高清在线看免费观看| 不卡免费成人日韩精品| 果冻传媒在线观看免费高清| 东京热男人的天堂社区| 国产欧美日韩精品成人专区| 国产老熟女乱子人伦视频| 欧美国产在线观看精品| 日本一本在线免费福利| 99精品国产一区二区青青| 丁香六月啪啪激情综合区| 精品国产亚洲av久一区二区三区| 精品一区二区三区免费看| 精品欧美日韩一二三区| 日韩在线视频精品视频| 欧美精品专区一区二区| 欧美日韩精品综合一区| 又黄又硬又爽又色的视频 | 国产午夜精品久久福利| 在线观看免费视频你懂的| 91人妻人人澡人人人人精品| 国产91人妻精品一区二区三区| 日本久久精品在线观看| 天堂网中文字幕在线视频| 韩国日本欧美国产三级| 日本欧美一区二区三区就| 亚洲一区二区三区一区| 国产午夜精品久久福利| 欧美久久一区二区精品| 99一级特黄色性生活片| 丁香七月啪啪激情综合| 国产精品日韩精品最新| 亚洲视频一区二区久久久|