东京热av人妻无码,国产在线视频一区二区三区,亚洲av无码一区二区二三区 ,日本人丰满xxxxhd

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

天天爽夜夜爽人人爽| 麻豆精品一区二区综合AV| 玩弄朋友娇妻呻吟交换电影| 女人下边紧了好还是松点好| 久久久久亚洲av成人片乱码| 同学的妺妺2在线观看| 肉妇春潮干柴烈火myfducc| 国产GV猛男GV无码男同网站| 四虎永久在线精品免费网址| 穿着旗袍方便c英语老师| 十七岁在线观看免费高清完整版| 国产午夜精品一区理论片飘花| 狠狠色噜噜狠狠狠狠色综合久av| 国产精品另类激情久久久免费| 亚洲国产一区二区三区亚瑟| 黄金网站免费下载安装| 精品久久久久久中文字幕无码软件| 人妻换人妻仑乱| 中文字幕无码乱人伦| 日本无码sm凌虐强制m字开腿| 国产精品久久| 国产人成视频在线观看| 老少配maturetube妊妇| 亚洲香蕉成人av网站在线观看| 爆乳无码av一区二区三区| 日韩精品无码专区免费播放| 成人av无码一区二区三区| 被男人吃奶跟添下面特舒服| 抽插视频| 国产在线拍偷自揄拍无码成人小说 | 97人伦影院a级毛片| 精品无码一区二区三区av| 艳妇乳肉豪妇荡乳AV| 国产重口小伙子嫖老女人| 少妇大荫蒂被巨大爽爽大| 色橹橹欧美在线观看视频高清| 99国产精品白浆在线观看免费| 妈妈的朋友在线观看| 好男人在线社区www在线影院 | 国精品无码一区二区三区在线蜜臀| 中文字幕无码精品亚洲资源网久久 |