硫酸锌
中文名称:七水硫酸锌
英文名称:Zinc sulphate
化学分子式:ZnSO4·7H2O
硫酸锌的特点:
锌是作物生长必需的微量元素之一,施用硫酸锌能提高作物籽实产量和品质,增强作物的光合作用和呼吸作用,激发细胞活力,促进作物体内碳水化合物的合成和运转,增加叶绿素和生长素的合成,促进作物对氮磷钾等营养元素的吸收,提高作物耐寒、耐旱、抗盐碱、抗病、抗逆能力,促早熟、增加千粒重。
做基肥:在种植玉米、小麦、棉花、甘薯、大豆等旱地上,一般每亩用硫酸锌1~2千克,拌干细土10~15千克,充分混合后均匀撒于地表,然后翻耕入土,也可条施或穴施。
种植蔬菜每亩用硫酸锌2~4千克。
用于水田可做早、中稻的耙面肥,每亩用1~1.5千克硫酸锌,加干细土20~25千克,充分拌匀后撒施,施后耙田插秧,也可与有机肥或生理酸性肥料混合均匀后再撒施(不能与磷肥混合)。
做秧田基肥时,每亩用3千克硫酸锌,在秧田播种前3天均匀撒于床面上。
硫酸锌、性能:无色晶体,小针状或粒状晶形粉末,无臭,在空气中会风化。溶液对石蕊呈酸性比重1.957(25/4℃),熔点100℃在280℃失去7H2O,溶于水及甘油,不溶于酒精,毒性底。
苹果公司今天在纽约股市收盘后发布了2016财年第三财季的财报,营收和利润不出意外的下滑,不过因为总营收和每股收益超过了市场预期,苹果股票在目前的盘后交易中上涨了7.21%,重回100美元以上。
质量指标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——碱金属和碱土金属盐w/%≤Alkali metal0.500.5酸度PH通过试验正常硒(Se),mg/kg ≤Se0.0030.003汞(Hg),mg/kg ≤Hg0.00010.0005铅(Pb),mg/kg ≤Pb0.00040.001镉(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.