一、化学名：磷酸氢二钾
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、抗氧化增效剂。
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。
| 质量指标 | specification | gb 1886.334-2021 | fcc vii | ||
| 含量（以干基计），w/% ≥ | content(on dry basis), w/% ≥ | 98.0 | 98.0 | ||
| 砷（as），mg/kg ≤ | arsenic(as),mg/kg ≤ | 3.0 | 3.0 | ||
| 氟化物（以f计），mg/kg ≤ | fluoride(as f),mg/kg ≤ | 10.0 | 10.0 | ||
| 重金属（以pb计），mg/kg ≤ | heavy metal(as pb),mg/kg ≤ | 10 | ——— | ||
| 水不溶物（以干基计），w/% ≤ | insoluble substances(on dry basis),w/%≤ | 0.2 | 0.2 | ||
| 铅（pb），mg/kg ≤ | lead (pb),mg/kg ≤ | 2.0 | 2.0 | ||
| 干燥减量，w/% | k2hpo4 ≤ | loss on drying,w/% | k2hpo4 ≤ | 2.0 | 2.0 |
| k2hpo4·h2o | loss on drying,w/% | k2hpo4·h2o | 22.0-26.0 | ——— | |
| ph值（10g/l溶液） | ph value (10g/l solution ) | 9.0±0.4 | ——— | ||
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.
