默克(merck)无机盐-制冷系统

默克(merck)无机盐-制冷系统

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产品简介

产品简介:名词解释ACS-符合美国化工协会的分析试剂,广泛的用于研发,质量控制。ISO-标准化组织的英语简称。其全称是InternationalOrganizationforStandardization或InternationalStandardOrganizedReag.Ph.Eur-Ph.Eur…

详细介绍

名词解释
ACS - 符合美国化工协会的分析试剂,广泛的用于研发,质量控制。
ISO - 标准化组织的英语简称。其全称是International Organization for Standardization或International Standard Organized
Reag.Ph.Eur - Ph.Eur. = European Pharmacopoeia = EP=欧洲药典。Reag.Ph.Eur就是符合欧洲药典的试剂。
GR - 默克在1851年首先推出的保证级试剂,也就是被行业一致认可的GR级试剂(Guarantee Reagent)
默克试剂新标准( EMSURE,EMPARTA,EMPLURA )
    德国默克化工在2010年推出了试剂新品牌系列:EMSURE®,EMPARTA®,EMPLURA®, 从而取代了GR级在市场上的习惯用法。旨在重新定义试剂的纯度,用的归纳将试剂作出准的分级和定位。
    其实,作为高纯试剂的,默克早在 1851 年首先推出保证级试剂,也就是被行业内一致认可的GR级试剂(Guarantee Reagent),其优异的试剂质量得到用户的肯定,和同行的追随。作为试剂行业的者,2009年开始默克开始致力于开创其产品的新标准,并于2010年推出了高纯试剂的金标准 EMSURE®。它的推出不仅提供了全面的产品线,并在保证质量的前提下,更进一步的保障了实验室技术人员的安全,保护了工作环境。
emsure
    所有EMSURE®高纯试剂拥有的品质和可靠性,符合所有重要的标准的要求。为了满足市场消费者的多样性,默克试剂溶剂提供丰富多样的包装规格和包装材质,供分析使用的EMSURE® 试剂能够满足实验室应用的要求。
  • 默克在 1851 年首先推出保证试剂
  • 列出了高达 42 种杂质
  • 参数 < 100ppb
  • 典型的实际分析 < 10 to 50ppb
  • 根据公开的标准进行批次测试
  • 保证批次间的一致性
  • 互联网上可查看和下载分析证书 COA
  • *符合与 ACS,ISO 及欧洲药典

EMSURE
这些高质量的产品是适合高要求的药品应用。产品符合ACS,ISO和Reag.Ph Eur。为了安全和方便的操作,产品提供了多种规格和材质。参数控制多达60种。
EMPARTA
这些中档的产品适合用于制药,化工和石油化工的应用。这些产品遵从了ACS条例。规格和材质的选择少于EMSURETM,大约控制10种参数。
EMPLURA
仅用于大批量使用,这个级别的产品适用于清洗(例如:用于学校),同时也用于生产,提取和合成。多控制五个参数。
聪明的包装
  • 宽颈聚乙烯瓶(PE)是适合大多数无机盐的包装,不仅聚乙烯瓶不会破碎而且不需要附加外包装。同碱性材料相比,聚乙烯在化学耐用性方面比玻璃更好
  • 只有少量侵蚀性的物质能够同聚乙烯反应,这样的产品采用玻璃瓶包装
  • 超过5kg的大包装采用组合包装:化合物被放入聚乙烯袋然后转入褶皱纸板箱
  • 敏感且有腐蚀性的散装产品被放入聚乙烯袋然后转入聚乙烯桶中
订货信息
货号
产品
101031
Aluminium ammonium sulfate dodecahydrate ( 十二水合硫酸铝铵 )  for analysis EMSURE® ACS
101063
Aluminium nitrate nonahydrate ( 无水硝酸铝 )  for analysis EMSURE®
101047
Aluminium potassium sulfate dodecahydrate ( 十二水合硫酸钾铝 )  for analysis EMSURE® ACS,Reag. Ph Eur
101116
Ammonium acetate ( 醋酸铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
101125
Ammonium bromide ( * )  for analysis EMSURE® ACS
101134
Ammonium carbamate ( 氨基甲酸铵 )  for analysis EMSURE®
102276
Ammonium cerium(IV) nitrate ( 硝酸铈铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
102273
Ammonium cerium(IV) sulfate dihydrate ( 二水合硫酸铈铵 )  for analysis EMSURE® ACS
101145
Ammonium chloride ( 氯化铵 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101126
Ammonium dihydrogen phosphate ( 磷酸二氢铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
101164
Ammonium fluoride ( 氟化铵 )  for analysis EMSURE® ACS
101182
Ammonium heptamolybdate tetrahydrate ( 钼酸铵 )  GR for analysis ACS,ISO,Reag. Ph Eur
101154
di-Ammonium hydrogen citrate ( 柠檬酸氢二铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
101207
di-Ammonium hydrogen phosphate ( 磷酸氢二铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
103776
Ammonium iron(III) sulfate dodecahydrate ( 十二水合硫酸铁铵 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
103792
Ammonium iron(II) sulfate hexahydrate ( 六水合*铵 )  for analysis EMSURE® ISO
101226
Ammonium monovanadate ( 钒酸铵 )  GR for analysis Reag. Ph Eur
101188
Ammonium nitrate ( )  for analysis EMSURE® ACS
101192
di-Ammonium oxalate monohydrate ( 一水合草酸铵 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101201
Ammonium peroxodisulfate ( 过硫酸铵 )  for analysis EMSURE® ACS,Reag. Ph Eur
101217
Ammonium sulfate ( 硫酸铵 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101213
Ammonium thiocyanate ( 硫氰酸铵 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
107838
Antimony(III) chloride ( 氯化锑 )  for analysis EMSURE® ACS
101704
Barium acetate ( 醋酸钡 )  for analysis EMSURE® ACS
101714
Barium carbonate ( 碳酸钡 )  for analysis EMSURE® ACS,Reag. Ph Eur
101719
Barium chloride dihydrate ( 二水合氯化钡 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101737
Barium hydroxide octahydrate ( 八水合氢氧化钡 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101729
Barium nitrate ( * )  for analysis EMSURE® ACS
101738
Barium perchlorate ( 高氯酸钡 )  anhydrous for analysis EMSURE®
101878
Bismuth(III) nitrate ( 硝酸铋 )  alkaline for analysis EMSURE® Reag. Ph Eur
102003
Cadmium acetate dihydrate ( 二水合醋酸镉 )  for analysis EMSURE®
102027
Cadmium sulfate hydrate ( 水合硫酸镉 )  for analysis EMSURE® ACS
102066
Calcium carbonate ( 碳酸钙 )  precipitated for analysis EMSURE® Reag. Ph Eur
102382
Calcium chloride dihydrate ( 二水合氯化钙 )  for analysis EMSURE® ACS,Reag. Ph Eur
102047
Calcium hydroxide ( 氢氧化钙 )  for analysis EMSURE® ACS,Reag. Ph Eur
102121
Calcium nitrate tetrahydrate ( 四水合硝酸钙 )  for analysis EMSURE® ACS
102161
Calcium sulfate dihydrate ( 二水合硫酸钙 )  precipitated for analysis EMSURE®
102274
Cerium(IV) sulfate tetrahydrate ( 四水合硫酸铈 )  for analysis EMSURE®
102038
Cesium chloride ( 氯化铯 )  for analysis EMSURE®
102481
Chromium(III) nitrate nonahydrate ( 九水合硝酸铬 (III) )  for analysis EMSURE®
101036
Chromium(III) potassium sulfate dodecahydrate ( 十二水合硫酸钾铬 )  for analysis EMSURE® ACS,Reag. Ph Eur
102529
Cobalt(II) acetate tetrahydrate ( 四水合醋酸亚钴 )  for analysis EMSURE® ACS
102539
Cobalt(II) chloride hexahydrate ( 六水合氯化亚钴 )  for analysis EMSURE® ACS,Reag. Ph Eur
102536
Cobalt(II) nitrate hexahydrate ( 六水合硝酸亚钴 )  for analysis EMSURE®
102554
Cobalt(II) nitrate hexahydrate ( 六水合硝酸亚钴 )  for analysis (max. 0.001% Ni) EMSURE® ACS,Reag. Ph Eur
102556
Cobalt(II) sulfate heptahydrate ( 七水合硫酸亚钴 )  for analysis EMSURE®
102711
Copper(II) acetate monohydrate ( 一水合醋酸铜 )  for analysis EMSURE® ACS
102739
Copper(I) chloride ( 氯化亚铜 )  for analysis EMSURE® ACS
102733
Copper(II) chloride dihydrate ( 二水合氯化铜 )  for analysis EMSURE® ACS,Reag. Ph Eur
102753
Copper(II) nitrate trihydrate ( 三水合硝酸铜 )  for analysis EMSURE®
102791
Copper(II) sulfate anhydrous ( 无水硫酸铜 )  for analysis EMSURE®
102790
Copper(II) sulfate pentahydrate ( 五水合硫酸铜 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
103943
Iron(III) chloride hexahydrate ( 六水合氯化铁 )  for analysis EMSURE® ACS,Reag. Ph Eur
103861
Iron(II) chloride tetrahydrate ( 四水合氯化亚铁 )  for analysis EMSURE®
103883
Iron(III) nitrate nonahydrate ( 九水合硝酸铁 )  for analysis EMSURE® ACS,Reag. Ph Eur
103965
Iron(II) sulfate heptahydrate ( 七水合* )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
112219
Lanthanum(III) chloride heptahydrate 98% ( 98%七水合氯化镧 )  for analysis
105326
Lanthanum nitrate hexahydrate ( 六水合硝酸镧 )  for analysis
107375
Lead(II) acetate trihydrate ( 三水合醋酸铅 )  for analysis EMSURE® ACS,Reag. Ph Eur
107381
Lead(II) carbonate ( 碳酸铅 )  for analysis EMSURE® ACS
107398
Lead(II) nitrate ( * )  for analysis EMSURE® ACS,Reag. Ph Eur
105680
Lithium carbonate ( * )  for analysis EMSURE® ACS,Reag. Ph Eur
105679
Lithium chloride ( 氯化锂 )  for analysis EMSURE® ACS,Reag. Ph Eur
105694
Lithium sulfate monohydrate ( 一水合硫酸锂 )  for analysis EMSURE® ACS,Reag. Ph Eur
105819
Magnesium acetate tetrahydrate ( 四水合醋酸镁 )  for analysis EMSURE® ACS,Reag. Ph Eur
105833
Magnesium chloride hexahydrate ( 六水合氯化镁 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
105827
Magnesium hydroxide carbonate ( 碱式碳酸镁 )  for analysis EMSURE®
105853
Magnesium nitrate hexahydrate ( 六水合硝酸镁 )  for analysis EMSURE® ACS,Reag. Ph Eur
105873
Magnesium perchlorate hydrate ( 高氯酸镁 )  [about 83% Mg(ClO4)2], desiccant, about 1-4 mm
105874
Magnesium perchlorate hydrate ( 高氯酸镁 )  [about 83% Mg(ClO4)2] for analysis 
106067
Magnesium sulfate anhydrous ( 无水* )  for analysis EMSURE®
105886
Magnesium sulfate heptahydrate ( 七水合* )  for analysis EMSURE® ACS,Reag. Ph Eur
105927
Manganese(II) chloride tetrahydrate ( 四水合氯化锰 )  for analysis EMSURE® ACS
105940
Manganese(II) nitrate tetrahydrate ( 四水合硝酸锰 )  for analysis EMSURE®
105941
Manganese(II) sulfate monohydrate ( 一水合硫酸锰 )  spray-dried for analysis EMSURE® ACS,Reag. Ph Eur
102786
Manganese(II) sulfate tetrahydrate ( 四水合硫酸锰 )  for analysis EMSURE®
104410
Mercury(II) acetate ( )  for analysis EMSURE® ACS,Reag. Ph Eur
104421
Mercury(II) bromide ( )  for analysis EMSURE® ACS,Reag. Ph Eur
104425
Mercury(I) chloride ( 氯化亚汞 )  for analysis EMSURE®
104419
Mercury(II) chloride ( )  for analysis EMSURE® Reag. Ph Eur,ACS
104428
Mercury(II) iodide ( )  red, for analysis EMSURE® ACS,Reag. Ph Eur
104437
Mercury(I) nitrate dihydrate ( 二水合硝酸亚汞 )  for analysis EMSURE®
104439
Mercury(II) nitrate monohydrate ( 一水合 )  for analysis EMSURE® ACS,Reag. Ph Eur
104480
Mercury(II) sulfate ( 硫酸汞 )  for analysis EMSURE® ACS
104484
Mercury(II) thiocyanate ( )  for analysis EMSURE® Reag. Ph Eur
106717
Nickel(II) chloride hexahydrate ( 六水合氯化镍 )  for analysis EMSURE® ACS
106721
Nickel(II) nitrate hexahydrate ( 六水合硝酸镍 )  for analysis EMSURE® ACS
106727
Nickel(II) sulfate hexahydrate ( 六水合硫酸镍 )  for analysis EMSURE® ACS
104912
Potassium bromate ( 溴酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
104905
Potassium bromide ( * )  for analysis EMSURE® ACS,Reag. Ph Eur
104928
Potassium carbonate ( 碳酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
104944
Potassium chlorate ( )  for analysis EMSURE®
104933
Potassium chloride ( )  for analysis (<= 0.005% Br) EMSURE® ACS,ISO,Reag. Ph Eur
104936
Potassium chloride ( )  for analysis EMSURE®
104952
Potassium chromate ( 铬酸钾 )  for analysis EMSURE® ACS,Reag. Ph Eur
104967
Potassium cyanide ( )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
104864
Potassium dichromate ( 重铬酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
104865
Potassium dichromate ( 重铬酸钾 )  for analysis (max. 0.000001% Hg) EMSURE® ACS,ISO
104877
Potassium dihydrogen phosphate ( 磷酸二氢钾 )  for analysis (<= 0.005% Na) EMSURE® ACS,ISO,Reag. Ph Eur
104873
Potassium dihydrogen phosphate ( 磷酸二氢钾 )  for analysis EMSURE® ISO
105107
Potassium disulfate (Potassium pyrosulfate) ( 二硫酸钾(焦硫酸钾) )  for analysis EMSURE® ACS
105057
Potassium disulfite ( 二亚硫酸钾 )  for analysis EMSURE®
104994
Potassium fluoride ( 氟化钾 )  for analysis EMSURE® ACS
104973
Potassium hexacyanoferrate(III) ( 六氰高铁酸钾 )  for analysis EMSURE® ACS,Reag. Ph Eur
104984
Potassium hexacyanoferrate(II) trihydrate ( 三水合六氰亚铁酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
105110
Potassium hexahydroxoantimonate(V) ( 六羟基锑酸钾 )  cryst. for analysis EMSURE®
104854
Potassium hydrogen carbonate ( 碳酸氢钾 )  for analysis EMSURE® ACS
104867
Potassium hydrogen diiodate ( 二碘酸氢钾 )  for analysis EMSURE®
105104
di-Potassium hydrogen phosphate ( * )  anhydrous for analysis EMSURE®
105099
di-Potassium hydrogen phosphate trihydrate ( 三水合* )  for analysis EMSURE®
104874
Potassium hydrogen phthalate ( 邻苯二甲酸氢钾 )  for analysis EMSURE® Reag. Ph Eur
104885
Potassium hydrogen sulfate ( 硫酸氢钾 )  for analysis EMSURE® Reag. Ph Eur
105051
Potassium iodate ( * )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
105043
Potassium iodide ( * )  for analysis EMSURE® ISO,Reag. Ph Eur
105063
Potassium nitrate ( 硝酸钾 )  for analysis EMSURE® ISO,Reag. Ph Eur
105067
Potassium nitrite ( 亚硝酸钾 )  cryst. for analysis EMSURE® ACS
105073
di-Potassium oxalate monohydrate ( 一水合草酸钾 )  for analysis EMSURE® ACS
105076
Potassium perchlorate )  for analysis EMSURE® ACS
105082
Potassium permanganate ( * )  for analysis EMSURE® ACS,Reag. Ph Eur
105084
Potassium permanganate )  for analysis (max. 0.000005% Hg) EMSURE® ACS
105092
Potassium peroxodisulfate ( 过硫酸钾 )  for analysis (<= 0.001% N) EMSURE® ACS,Reag. Ph Eur
105091
Potassium peroxodisulfate ( 过硫酸钾 )  for analysis EMSURE®
108087
Potassium sodium tartrate tetrahydrate ( 四水合酒石酸钾钠 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
105153
Potassium sulfate ( 硫酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
105134
Potassium sulfide ( 硫化钾 )  small lumps for analysis EMSURE®
105125
Potassium thiocyanate ( 硫氰酸钾 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
107615
Rubidium chloride ( 氯化铷 )  for analysis EMSURE®
101512
Silver nitrate ( * )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
101509
Silver sulfate ( 硫酸银 )  GR for analysis ACS
106268
Sodium acetate ( 醋酸钠 )  anhydrous for analysis EMSURE® ACS,Reag. Ph Eur
106267
Sodium acetate trihydrate ( 三水合醋酸钠 )  for analysis indifferent to potassium permanganate EMSURE® ACS,ISO,Reag. Ph Eur
106682
Sodium ammonium hydrogen phosphate tetrahydrate ( 四水合磷酸氢铵钠 )  for analysis EMSURE®
106393
Sodium carbonate ( 碳酸钠 )  anhydrous, for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106392
Sodium carbonate ( 碳酸钠 )  anhydrous for analysis EMSURE® ISO
106391
Sodium carbonate decahydrate ( 十水合碳酸钠 )  for analysis EMSURE® ISO,Reag. Ph Eur
106404
Sodium chloride ( )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106448
tri-Sodium citrate dihydrate ( 二水合柠檬酸三钠 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106336
Sodium dichromate dihydrate ( 二水合 )  for analysis EMSURE® ACS
106346
Sodium dihydrogen phosphate monohydrate ( 一水合* )  for analysis EMSURE® ACS,Reag. Ph Eur
106591
tetra-Sodium diphosphate decahydrate ( 十水合二磷酸四钠 )  for analysis EMSURE® ACS,Reag. Ph Eur
106528
Sodium disulfite ( 焦亚硫酸钠 )  (sodium metabisulfite) for analysis EMSURE® ACS,Reag. Ph Eur
106449
Sodium fluoride ( 氟化钠 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106443
Sodium formate ( 甲酸钠 )  for analysis EMSURE® ACS,Reag. Ph Eur
102521
Sodium hexanitrocobaltate(III) ( 六硝基钴酸钠 )  [sodium cobalt(III)nitrite] for analysis EMSURE® ACS,Reag. Ph Eur
106329
Sodium hydrogen carbonate ( * )  for analysis EMSURE® ACS,Reag.Ph Eur
106586
di-Sodium hydrogen phosphate ( * )  anhydrous for analysis EMSURE® ACS,Reag. Ph Eur
106559
di-Sodium hydrogen phosphate anhydrous ( 无水* )  for analysis particle size about 0.2-1 mm (~18-80 mesh ASTM) EMSURE®
106580
di-Sodium hydrogen phosphate dihydrate ( 二水合* )  for analysis EMSURE®
106579
di-Sodium hydrogen phosphate dodecahydrate ( 十二水合* )  for analysis EMSURE® ISO,Reag. Ph Eur
106575
di-Sodium hydrogen phosphate heptahydrate ( 七水合* )  for analysis 
106352
Sodium hydrogen sulfate monohydrate ( 一水合硫酸氢钠 )  for analysis EMSURE®
106525
Sodium iodate ( 碘酸钠 )  for analysis EMSURE®
106597
Sodium metaperiodate ( 偏过碘酸钠 )  for analysis EMSURE® ACS,Reag. Ph Eur
106521
Sodium molybdate dihydrate ( 二水合钼酸钠 )  for analysis EMSURE®
106537
Sodium nitrate ( 硝酸钠 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106549
Sodium nitrite ( * )  for analysis EMSURE® ACS,Reag. Ph Eur
106541
Sodium nitroprusside dihydrate ( 亚硝铁 )  [disodium pentacyanonitrosyl ferrate(III) dihydrate] GR for analysis ACS,Reag. Ph Eur
106557
di-Sodium oxalate ( 草酸二钠 )  for analysis EMSURE®
106563
Sodium peroxide ( 过氧化钠 )  granular for analysis ACS,ISO
106609
Sodium peroxidisulfate ( 过二硫酸钠 )  for analysis EMSURE®
106572
tri-Sodium phosphate dodecahydrate ( 十二水合磷酸钠 )  for analysis EMSURE®
106578
tri-Sodium phosphate dodecahydrate ( 十二水合磷酸三钠 )  for analysis EMSURE® ACS,Reag. Ph Eur
106601
Sodium salicylate ( * )  for analysis EMSURE®
106637
Sodium sulfate ( 硫酸钠 )  anhydrous, coarse granules for analysis 0.63 - 2.0 mm EMSURE® ACS
106649
Sodium sulfate ( 硫酸钠 )  anhydrous for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106648
Sodium sulfate decahydrate ( 十水合硫酸钠 )  for analysis EMSURE® ACS,Reag. Ph Eur
106657
Sodium sulfite ( 亚硫酸钠 )  anhydrous for analysis EMSURE® Reag. Ph Eur
106663
di-Sodium tartrate dihydrate ( 二水合酒石酸二钠 )  for analysis EMSURE®
106516
Sodium thiosulfate pentahydrate ( * )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
106673
Sodium tungstate dihydrate ( 二水合钨酸钠 )  for analysis EMSURE®
107865
Strontium chloride hexahydrate ( 六水合氯化锶 )  for analysis EMSURE® ACS
107872
Strontium nitrate ( 硝酸锶 )  for analysis EMSURE®
108150
Tetraphenylarsonium chloride monohydrate ( 四苯基氯化砷 )  for analysis EMSURE®
107815
Tin(II) chloride dihydrate ( 二水合氯化亚锡 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
107814
Tin(II) chloride dihydrate ( 二水合氯化亚锡 )  for analysis (max. 0.000001% Hg) EMSURE®
107823
Tin(II) sulfate ( 硫酸亚锡 )  for analysis EMSURE®
108802
Zinc acetate dihydrate ( 二水合醋酸锌 )  for analysis EMSURE® ACS
108816
Zinc chloride ( 氯化锌 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
108828
Zinc iodide ( 碘化锌 )  for analysis EMSURE®
108833
Zinc nitrate tetrahydrate ( 四水合硝酸锌 )  for analysis EMSURE®
108883
Zinc sulfate heptahydrate ( 七水合硫酸锌 )  for analysis EMSURE® ACS,ISO,Reag. Ph Eur
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