以上所述只是講了七水硫酸鋅在一些具有代表性領(lǐng)域的應(yīng)用,詳細(xì)的介紹還有很多,因此在硫酸鋅采購和應(yīng)用過程中,作為采購者或經(jīng)營使用者首先要搞清楚它的用途,不同的用途對產(chǎn)品的要求不盡相同,有時甚至區(qū)別很大,有些是國家標(biāo)準(zhǔn)所不能涵蓋的和所不能達(dá)到的,因此硫酸鋅產(chǎn)品的價格差別很大,可達(dá)2—3倍,所以請采購者必須注意以下幾點(diǎn):
1.說明用途
2.明確使用原理
3.清楚使用方法
4.其他特殊要求
搞清楚以上四點(diǎn),就基本上能夠按質(zhì)量要求和適當(dāng)?shù)膬r格買到你所要的產(chǎn)品,不至于造成盲目采購,給工作帶來麻煩和損失。
硫酸鋅、性能:無色晶體,小針狀或粒狀晶形粉末,無臭,在空氣中會風(fēng)化。溶液對石蕊呈酸性比重1.957(25/4℃),熔點(diǎn)100℃在280℃失去7H2O,溶于水及甘油,不溶于酒精,毒性底。
蘋果公司今天在紐約股市收盤后發(fā)布了2016財年第三財季的財報,營收和利潤不出意外的下滑,不過因?yàn)榭偁I收和每股收益超過了市場預(yù)期,蘋果股票在目前的盤后交易中上漲了7.21%,重回100美元以上。
質(zhì)量指標(biāo)SpecificationGB25579-2010FCC,1996含量w/% ZnSO4.H2OContentZnSO4.H2O99.0-100.598.0-100.5ZnSO4.7H2OZnSO4.7H2O99.0-108.799.0-108.7砷(As),mg/kg ≤As0.0003——堿金屬和堿土金屬鹽w/%≤Alkali metal0.500.5酸度PH通過試驗(yàn)正常硒(Se),mg/kg ≤Se0.0030.003汞(Hg),mg/kg ≤Hg0.00010.0005鉛(Pb),mg/kg ≤Pb0.00040.001鎘(Cd),mg/kg ≤Cd0.00020.0005
1、ChemicalName: Zinc sulfate
2、Molecular Formula :ZnSO4.H2O, ZnSO4.7H2O
3、MolecularWeight:179.48(Monohydrate), 287.54(Heptahydrate)
4、CAS:7446-19-7(H2O);7446-20-0 (7H2O)
5、Character:It iscolorless or white crystalline powder,odorlessness. Efflorescence in air. Acid hydrometer is 1.957(25/4℃) to litmus.Melting point is 100℃. It’s soluble in water and glycerol, insoluble in ethanol and light toxicity, lose crystal water in 280℃.
6、Usage:It is used as food additives, animal feed, printing and dyeing, timber preservative.Used as analytical reagent.
7、Packing:It is packed with polythene bag as the inner layer, and a compound plastic woven bag as the outer layer. The net weight of each bag is 25kg.
8、Storage and Transport:It should be stored in a dry and ventilative warehouse; kept away form water and moisture during transport; unloaded with care, so as to avoid damage to bags. Furthermore, it should be stored separately from poisonous substances.
鋅是許多酶系統(tǒng)
(
如碳酸酐酶、乙醇脫氫酶和堿性磷酸酶等
)
的組成部分,鋅
缺乏可導(dǎo)致酶功能異常。
口服硫酸鋅可糾正鋅缺乏,
恢復(fù)酶系統(tǒng)的功能。
鋅離子
能沉淀蛋白質(zhì),外用有收斂防腐作用,且能幫助肉芽組織形成。