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一、化學名：磷酸氫二鉀
二、分子式(shi)：K2HPO4 ；K2HPO4·3H2O
三(san)、分子量：無水物：174.178；三(san)水物：228.238
四、CAS：無水物：7758-11-4；三(san)水物：16788-57-1
五、性狀：無色或(huo)(huo)白色正方晶(jing)體粉末或(huo)(huo)顆粒，易潮解(jie)，呈堿(jian)性不溶(rong)于乙醇，1﹪水溶(rong)液(ye)的PH值約為9。具有吸濕性。
六、用途：在食(shi)(shi)品工業中作(zuo)緩沖劑(ji)、螯合劑(ji)、酵母食(shi)(shi)料、乳化鹽、抗(kang)氧化增效劑(ji)。
七、包裝：內襯聚乙烯塑料袋，外套(tao)復合塑料編織袋包裝，每(mei)袋凈重(zhong)25kg。
八、貯存(cun)與(yu)運輸(shu)(shu)：本(ben)品(pin)應貯存(cun)在干燥通(tong)風清潔的庫(ku)房中，裝(zhuang)載(zai)運輸(shu)(shu)時要輕裝(zhuang)輕放，防止包(bao)裝(zhuang)破損，防止受(shou)潮、受(shou)熱，運輸(shu)(shu)過程(cheng)中防止雨(yu)淋受(shou)潮，應與(yu)有毒(du)物品(pin)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.