亚洲国产精品99久久久久久,日韩亚洲综合一区二区三区,无码 人妻 在线 视频,双乳被一左一右吃着的,中文字幕人妻色偷偷久久

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

亚洲av久久无码| 日日摸日日碰天天爽歪歪| 久久久久久久国产精品人| 亚洲av制服一区二区三区| 蜜臀国产av一区二区三区| 18禁亚洲深夜福利人口| 免费观看性欧美大片无片| 中文字幕乱码在线人视频| 中文在线中文资源| 久久久久久9一区二区黒| 香港三日本三级少妇三级视频| segui久久综合精品| 无码乱码av天堂一区二区| 色狠狠色噜噜av天堂一区| 韩国公妇里乱片a片| 亚洲成色www久久网站| 精品日韩欧美一区二区三区| 紧身裤翘臀福利一区二区| 精品久久久久久久无码人妻热| 一边摸一边做爽的视频17国产| 双乳被一左一右吃着动态图| 日本xxxx色视频在线观看免费| 亚洲综合色视频在线观看| 国产精品无码a∨精品影院| 日本久久久久久久久网站| 亚洲综合欧美色五月俺也去| 疯狂做受XXXX高潮对白| 青娱乐在线精品| 国产成人无码a区在线观看视频| 伊人国产精品久久久久久| 国色天香久久久久久久小说| 国产未成女YOUNV仙踪林| 女人三a级毛片视频| 亚洲Ⅴa国产片| 六十路の高齢熟女が中文在线播放 | 污污污网站在线观看污污污| 被强到爽的邻居人妻完整版| 亚洲av无码国产综合专区| 被黑人猛烈进出到抽搐动态图| 久久精品亚洲精品国产高潮| 韩国日本在线观看一区二区|