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

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

亚洲国产长腿丝袜AV天堂| 日韩精品一区二区三区在线观看| 乱色欧美激惰| 亚洲精品ww久久久久久| 亚洲欧美日韩V在线观看不卡| 日韩中文字幕精品在线| 国产a∨精品一区二区三区不卡| 久久这里精品国产99丫E6| 在线成人精品国产区免费| 公交车大龟廷进我身体里| 久久久国产麻豆精品一区| 免费A级毛片无码免费视频120软件| 国产一区精品在线观看| 国产精品久久久久久久新郎| 日韩欧美一区二区三区免费观看| 少妇扒开双腿自慰出白浆| 亚洲AV中文无码字幕色最| 日本欧美韩国在线观看| 国产在线精彩视频二区| 亚色影库| 插我一区二区在线观看| 日韩欧国产精品一区综合无码| 中文字幕亚洲精品日韩一区| 少妇高潮无套内谢麻豆传| 国产福利在线观看91精品| 国产男人av天堂| 好紧好大快点舒服使劲| 日韩欧美色视频在线观看| 亚洲精品ty久久久久久| 偷偷狠狠的日日高清完整视频| 久久WWW成人看片免费不卡| 精品国产自在在线午夜精品| JIZZJIZZ日本高潮喷水| 国产日韩视频| 少妇高校长白结全文阅读| 在线天堂网WWW| 蜜桃视频一区二区在线看| 西西人体44| 看大片人与拘牲交| 把腿张开老子臊烂你调教束缚| 精品国富产二代APP官方入口|