硫酸铵

硫酸铵 AMMONIUM SULFATE 一、化学名：硫酸铵 二、分子式：(NH4)2SO4 三、分子量：132.14 四、CAS：7783-20-2 五、性状：无色透明斜方晶系结晶。相对密度1.769（50℃）。易溶于水（0℃时70.6g/100mL水，100℃时103.8g/100mL水），水溶液呈酸性。不溶于乙醇、丙酮和氨。与碱类作用放出氨气。易潮解。 六、用途：GB 2760-2011 加工助剂：限用于发酵工艺中用作发酵用营养物质。亦用于面团调节剂；酵母食料。用作鲜酵母生产中酵母菌培养用氮源，用量不规定。作为面包中酵母养料中的用量约10%（约为小麦粉量的0.25%）。 七、包装：内衬聚乙烯塑料袋，外套复合塑料编织袋包装，每袋净重25kg。 八、贮存与运输：本品应贮存在干燥通风清洁的库房中，装载运输时要轻装轻放，防止包装破损，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离。 质量指标 Specifications GB 29206-2012 FCC VII 含量（(NH4)2SO4），w/% Content(?(NH4)2SO4), ?w/% 99.0-100.5 99.0-100.5 灼烧残渣，w/% ≤ ≤ ≤ Residue on Ignition (Sulfated Ash), w/%≤ 0.25 0.25 砷（As），mg/kg ≤ ≤ Arsenic (As) ,mg/kg ≤ 3 ———— 硒（Se），mg/kg ≤ ≤ Selenium(Se),mg/kg ≤ ≤ 30 30 铅（Pb），mg/kg ≤ ≤ Lead(Pb),mg/kg ≤ ≤ 3 3 1、Chemical Name: Ammonium Sulfate 2、Molecular Formula : (NH4)2SO4 3、Molecular Weight: 132.14 4、CAS: 7783-20-2 5、Character: It is colorless transparent orthorhombic crystal,deliquescent.The relative density is 1.769(50℃). It’s easily soluble in water（At 0℃, solubility is 70.6g/100mL water; 100℃, 103.8g/100mL water）. Aqueous solution is acidic. It’s insoluble in ethanol, acetone or ammonia. It reacts with the alkalies to form ammonia. 6、Usage: According to GB 2760-2011, it could be used as processing aid (only used as nutrient for fermentation). It also could be used as dough regulator and yeast food. In the fresh yeast production, it’s used as the nitrogen source for yeast cultivation (Dosage is not specified.). Dosage is about 10% (about 0.25% of wheat powder) for yeast nutrient in bread. 7、Packing: It is packed with polyethylene bag as inner layer, and a compound plastic woven bag as 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 from heat and moisture during transportation, unloaded with care so as to avoid damage. Furthermore, it must be stored separately from poisonous substances.