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一、化學名：磷酸氫二鉀
二(er)、分子式(shi)：K2HPO4 ；K2HPO4·3H2O
三、分子量：無水物：174.178；三水物：228.238
四(si)、CAS：無水(shui)物(wu)：7758-11-4；三水(shui)物(wu)：16788-57-1
五、性(xing)狀：無色(se)或白(bai)色(se)正方晶體(ti)粉(fen)末或顆粒，易潮解，呈堿性(xing)不(bu)溶于乙醇，1﹪水溶液的PH值約為9。具有吸濕性(xing)。
六(liu)、用途：在食品工(gong)業中作(zuo)緩沖劑、螯(ao)合劑、酵母食料(liao)、乳化(hua)鹽、抗氧化(hua)增效劑。
七、包(bao)裝：內襯(chen)聚(ju)乙烯(xi)塑料袋，外套(tao)復合塑料編(bian)織袋包(bao)裝，每袋凈重25kg。
八、貯存與運輸(shu)：本品應貯存在干(gan)燥通(tong)風(feng)清潔的庫房(fang)中(zhong)，裝(zhuang)載運輸(shu)時要輕(qing)裝(zhuang)輕(qing)放，防(fang)(fang)止(zhi)(zhi)包裝(zhuang)破損，防(fang)(fang)止(zhi)(zhi)受(shou)潮、受(shou)熱，運輸(shu)過程中(zhong)防(fang)(fang)止(zhi)(zhi)雨淋受(shou)潮，應與有毒物品隔離。
| 質量指標 | Specification | GB 1886.334-2021 | FCC VII | ||
| 含量（以干基計），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計），mg/kg ≤ | Fluoride(as F),mg/kg ≤ | 10.0 | 10.0 | ||
| 重金屬（以Pb計），mg/kg ≤ | Heavy metal(as Pb),mg/kg ≤ | 10 | ——— | ||
| 水不溶物（以干基計），w/% ≤ | Insoluble substances(On dry basis),w/%≤ | 0.2 | 0.2 | ||
| 鉛（Pb），mg/kg ≤ | Lead (Pb),mg/kg ≤ | 2.0 | 2.0 | ||
| 干燥減量，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.