國產一級視頻在線觀看_最近中文字幕视频免费_一级片在线观看无码_丰满年轻岳欲乱中文字幕电影_综合少妇影视三级_日本精品卡一卡新区_黄色成人免费电影_97偷自拍亚洲综合二区_国产毛片网站三级国产骚熟_国产无遮挡无码视频在线看

?? ??

????

Tel:+86-335-5978826
Address: Green Chemical Industry Garden, Lulong Economic Development Zone, Qinhuangdao City, Hebei Province, China.
Mobile:+86-15227250682,
+86-13313337629
E-mail:tzchem@163.com;
tzchem@tianzichem.com
tzsales@tianzichem.com

???? > ?? ?????

??? ?????

??：

??? ?????

CAS number:

13845-18-6

???：

NH2SO3Na

??????：

2,000?

???：

118.98

?????:

????，??174℃，?? ? ??? ???? ? ??????.
????, ?????, ????,
??????? ???

?????：

???25kg.?? ?????? ????, ??, ?? ?? ????.

????：

????	??
??? ????? %	≥99.5
? ??? ??%	≤0.5
PH?(10% ???)	7～8

Copyright(C)2017,Qinhuangdao Tianzi Chemical Industry Co.,Ltd All Rights Reserved. ?Supported by ?ChemNet?ChinaChemNet?Toocle?Copyright Notice
Tel:+86-335-5978826 Fax:+86-335-5978826 E-mail:tzchem@163.com; Contact: Mr liu +86-13931486198