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
fcc,1996
含量                   %
content（dry basis）
99.0-100.5
干燥失重（105℃，1h）  ≤%
loss on drying
1.0
硫酸盐灰分             ≤%
sulfate ash
0.1
乙醇不容物             ≤%
insoluble in ethanol
0.04
砷                     ≤%
as
0.0003
重金属                 ≤%
heavy metals
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 is colorless or white odorless little flakes or crystalline powder. it has hygroscopicity. 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.

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