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二、分子式：K2HPO4 ；K2HPO4·3H2O
三、分子量：无水物：174.178；三水物：228.238
四、CAS：无水物：7758-11-4；三水物：16788-57-1
五、性状：无色或白色正方晶体粉末或颗粒，易潮解，呈碱性不溶于乙醇，1﹪水溶液的PH值约为9。具有吸湿性。
六、用途：在食品工业中作缓冲剂、螯合剂、酵母食料、乳化盐、增效剂。
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。
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质量指标 |
Specification |
GB 1886.334-2021 |
FCC VII |
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含量（以干基计），w/% ≥ |
Content(On dry basis), w/% ≥ |
98.0 |
98.0 |
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砷（As），mg/kg ≤ |
Arsenic(As),mg/kg ≤ |
3.0 |
3.0 |
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氟化物（以F计），mg/kg ≤ |
Fluoride(as F),mg/kg ≤ |
10.0 |
10.0 |
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重金属（以Pb计），mg/kg ≤ |
Heavy metal(as Pb),mg/kg ≤ |
10 |
——— |
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水不溶物（以干基计），w/% ≤ |
Insoluble substances(On dry basis),w/%≤ |
0.2 |
0.2 |
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铅（Pb），mg/kg ≤ |
Lead (Pb),mg/kg ≤ |
2.0 |
2.0 |
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干燥减量，w/% |
K2HPO4 ≤ |
Loss on drying,w/% |
K2HPO4 ≤ |
2.0 |
2.0 |
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K2HPO4·H2O |
Loss on drying,w/% |
K2HPO4·H2O |
22.0-26.0 |
——— |
|
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pH值（10g/L溶液） |
pH value (10g/L Solution ) |
9.0±0.4 |
——— |
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1、Chemical Name: Dipotassium Phosphate
2、Molecular Formula: K2HPO4 ; K2HPO4· 3H2O
3、Molecular Weight: Anhydrous:174.178 ; Trihydrate:228.238
4、CAS: Anhydrous:7758-11-4 ; Trihydrate:16788-57-1
5、Character: It’s colorless or white square crystal granule or powder, easily deliquescent, alkaline, insoluble in ethanol. PH value is about 9 in 1% aqueous solution.
6、Usage: In food industry, it is used as buffering agent, chelating agent, yeast food, emulsifying salt, synergistic agent of anti-oxidation.
7、Packing: It is packed with a polyethylene bag as the inner layer, and a compound plastic woven bag as outer layer. The net weight of each bag is 25kg.
8、Storage & Transportation: 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.