一、化学名：双乙酸钠
　　二、分子式：c4h7na o4·xh2o
　　三、分子量：142.09(无水物)
　　四、cas：126-96-5
　　五、性能：白色结晶。带醋酸气味。易吸潮。极易溶于水(1g/ml)，放出42.25%醋酸。10%水溶液的ph值4.5~5.0.加热至150℃以上分解。可燃。
　　六、用途：防腐剂;防霉剂;酸度调节剂;螯合剂。
　　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
gb25538-2010
游离乙酸（以干基计）, w/% 
free acetic acid (as dry basis) %
39.0~41.0
乙酸钠（以干基计）, w/%     
naoac (as dry basis) %
58.0~60.0
ph值
ph value
4.5~5.0
水分, w/%               ≤
moisture
2.0
易氧化物, w/%           ≤
oxidizable substances
0.2
铅（pb）,mg/kg           ≤
lead （as pb）
2
1.chemical name:sodium diacetate
　　2.molecular formula :c4h7na o4.xh2o
　　3.molecular weight: 142.09 (anhydride)
　　4.cas: 126-96-5
　　5.character: white crystalline granule or powder; with acetic acid smell. deliquescent; highly soluble in water (1g/ml), and create acetic acid with 42.25%. the ph value of aqueous solution with 10% is between 4.5 and 5.0. it will be broken up when heated to 150. flammable.
　　6.usage: it is used as preservative, mildew-retarding agent, acidity regulator, and chelating agent.
　　7.packing: it is packed with polythene bag as the inner layer, and polywoven bag as the outer layer. the net weight of each bag is 25kg.
　　8.storage and transport: it should be stored in a dry, clean, and ventilative warehouse, kept away from water and moisture during transport, unload with care so as to avoid damaging the bags. be cautious to keep away from moisture and hot.

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