中文无码精品一区二区三区,欧美亚洲777奇米四色,72人少妇精品导航,777熟女色

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

欧洲色综合天天在线观看| 老子影院午夜精品无码| 八戒观看免费高清电视剧| 1级毛片在线观看| 日本人妻中文字| 护士做爰取精视频| 69xx免费播放| 十八岁高清版免费观看电视剧| 午夜大肉棒插大鸡巴视频| 亚洲欲色欲香天天综合网| 转生成为史莱姆这档事第四季| 1024影视基地| 国产欧美一区色二区三区| 中国产一级片| 肉yin荡公厕肉便调教车ac| 成人伊人青草久久综合网| 护士的色诱2在线观看免费| 另类老妇性bbwbbw高清| 日本一级爽快片淫片潘金莲在线| 中文字幕人妻丝袜成熟乱| 久久99精品久久久久婷综合| 日韩精品中文一区二区三区| 99无人区码一码二码三| 美女视频图片一区二区三区| 欧美大荫蒂毛茸茸视频汇编| 日韩欧美一区二区三区不学| 乳乱人伦| 日本午夜三级视频| 久久99精品久久久久婷综合| 欧美亚洲777奇米四色| 女警察高清一级毛片| 亚洲高清穴| 九七电影院微信在线观看| 7799天天综合网精品| 国产精品天天看| 羞羞av.tv| 中文精品欧美无线码一区| 色妞av一区二区在线观看| 少妇邻居成人妻久久| 伊东千奈美一区二区在线观看| 香蕉人妻av久久久久天天|