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：无色或白色正方结晶、粉末或颗粒，吸湿性强、极易潮解；水溶液呈碱性，不溶于乙醇，相对密度 2.44 g/cm³，1% 水溶液 pH 约 9.0。
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：本品存放于干燥、通风、洁净库房；装卸运输轻拿轻放，避免包装破损；严防雨淋、受潮、受热，需与有毒化学品隔离存放运输。
| 质量指标 | Specification | GB 1886.334-2021 | FCC 14 | ||
| 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（以F计），mg/kg ≤ | Fluoride(as F),mg/kg ≤ | 10.0 | 10.0 | ||
| 重金属（以Pb计），mg/kg ≤ | Heavy metals(as Pb),mg/kg ≤ | 10.0 | ——— | ||
| 水不溶物（以干基计），w/%≤ | Water-insoluble matter (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 |
| K2HPO4·3H2O | Loss on drying,w/% | K2HPO4·3H2O | 22.0-26.0 | ——— | |
| pH值（10g/L溶液） | pH value (10g/L Solution ) | 9.0±0.4 | 9.0 | ||
| 焦磷酸钾（以K4P2O7计），w/% ≤ | Pyrophosphate (as K4P2O7 )，w/% ≤ | ——— | 2.0 | ||
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:Colorless or white cubic crystalline powder or granules, hygroscopic, alkaline, insoluble in ethanol, with a relative density of 2.44 g/cm³ and a pH of approximately 9 for a 1% aqueous solution. It is hygroscopic.
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.
