尿素 UREA
一、化学名：尿素
二、分子式：CH4N2O
三、分子量：60.06
四、CAS：57-13-6
五、性能：无色或白色无臭小片或结晶性粉末。具吸湿性。相对密度为1.335，熔点132.7℃（分解）。溶于水、乙醇和苯，几乎不溶于乙醚和氯仿。
六、用途：酵母食料；胶姆糖组织改进剂。用于含醇饮料、明胶制品、葡萄酒、酵母发酵性焙烤制品。
七、包装：内衬聚乙烯塑料袋，外套塑料编织袋，每袋25Kg。
八、贮存与运输：应贮在干燥，通风清洁的库房中，轻装轻放，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离堆放。
质量指标 | Specification | FAO/WHO,1993 | FCC,1996 |
含量(干基计) % | Content（Dry Basis） | 99.0-101.0 | 99.0-100.5 |
干燥失重（105℃，1h） ≤% | Loss On Drying | 1.0 | 1.0 |
硫酸盐灰分 ≤% | Sulfate Ash | 0.1 | 0.1 |
乙醇不容物 ≤% | Insoluble In Ethanol | 0.04 | 0.04 |
碱度 | Alkalinity | Normal | -- |
铵离子 ≤% | Ammonium Ion | 0.05 | -- |
缩二脲 ≤% | Biuret | 0.1 | -- |
砷 ≤% | As | 0.0003 | 0.0003 |
重金属 ≤% | Heavy Metals | 0.001 | 0.001 |
氯化物 ≤% | Chlorides | -- | 0.007 |
铅 ≤% | Pb | -- | 0.0005 |
硫酸盐 ≤% | Sulfates | -- | 0.01 |
1、Chemical Name:UREA
2、Molecular Formula :CH4N2O
3、Molecular Weight:60.06
4、CAS:57-13-6
5、Character:It iscolorless or white ordorless little flakes or crystalline powder. It hashygroscopicity. Relative density is 1.335. Melting point is 132.7℃(decompose). It’s soluble in water, ethanol and benzene, almost insoluble in aether and chloroform.
6、Usage:It is used as yeast food and gum confection improver. It also can be used in ethanol drinks, glutin products, wines and yeast fermented baking products.
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.
