一、化学名：磷酸氢二钠
二、分子式：Na2HPO4；Na2HPO4·2H2O；Na2HPO4·12H2O
三、分子量：无水物：141.958；二水物：177.998；十二水物：358.198
四、CAS：无水物：7558-79-4；二水物：10028-24-7；十二水物：10039-32-4
五、性状：白色结晶性粉末或颗粒。它可以是无水物或含有两分子结合水。无水物形式易吸湿。两种形式都易溶于水，但不溶于乙醇。
六、用途：食品中作焙制品，防止氧化变色；奶制品的乳化剂，防止蛋白凝固，固体饮料起螯合、乳化缓冲作用。还可以用于软水剂、防火剂、工业水质处理剂和洗涤剂。
七、包装：内衬聚乙烯塑料袋，外套复合塑料编织袋，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 | Specification | GB1886.329-2021 | FCC VII | ||
| 含量Na2HPO4（以干基计），w/% ≥ | Content Na2HPO4,( On dry basis),w/%≥ | 98.0 | 98.0 | ||
| 砷（As），mg/kg ≤ | Arsenic(As),mg/kg ≤ | 3.0 | 3.0 | ||
| 重金属（以Pb计），mg/kg ≤ | Heavy metal(as Pb),mg/kg ≤ | 10 | ——— | ||
| 铅（Pb），mg/kg ≤ | Lead(Pb),mg/kg ≤ | 4.0 | 4.0 | ||
| 氟化物（以F计），mg/kg ≤ | Fluorides(as F),mg/kg ≤ | 50.0 | 50.0 | ||
| 水不溶物，w/% ≤ | Insoluble substances,w/% ≤ | 0.2 | 0.2 | ||
| 干燥减量，w/% | Na2HPO4 ≤ | Loss on drying,w/% | Na2HPO4 ≤ | 5.0 | 5.0 |
| Na2HPO4·2H2O | Na2HPO4·2H2O | 18.0-22.0 | 18.0-22.0 | ||
| Na2HPO4·12H2O≤ | Na2HPO4·12H2O ≤ | 61.0 | ——— | ||
1、Chemical Name: Disodium Phosphate
2、Molecular Formula: Na2HPO4 ; Na2HPO4·2H2O ; Na2HPO4·12H2O
3、Molecular Weight: Anhydrous:141.958 ; Dihydrate:177.998 ; Dodecahydrate:358.198
4、CAS: Anhydrous:7558-79-4 ; Dihydrate:10028-24-7 ; Dodecahydrate:10039-32-4
5、Character: It is a white crystalline powder or particle. It can be anhydrous or contain two molecules of bound water. The anhydrous form absorbs moisture easily. Both forms are soluble in water but insoluble in ethanol.
6、Usage: In food industry, it is used as agent for baking to avoid oxidation stain and as emulsifier in dairy product to prevent egg white from solidification. It is also used as emulsifier and chelating agent for solid drinks.It can also be used as water softener, fire retardant, industrial water treatment agent and detergent.
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.
