一、化學(xué)名：磷酸氫二鉀
二、分子式：K2HPO4?；K2HPO4·3H2O
三、分子量：無水物：174.178；三水物：228.238
四、CAS：無水物：7758-11-4；三水物：16788-57-1
五、性狀：無色或白色正方晶體粉末或顆粒，易潮解，呈堿性不溶于乙醇，1﹪水溶液的PH值約為9。具有吸濕性。
六、用途：在食品工業(yè)中作緩沖劑、螯合劑、酵母食料、乳化鹽、抗氧化增效劑。
七、包裝：內(nèi)襯聚乙烯塑料袋，外套復(fù)合塑料編織袋包裝，每袋凈重25kg。
八、貯存與運輸：本品應(yīng)貯存在干燥通風(fēng)清潔的庫房中，裝載運輸時要輕裝輕放，防止包裝破損，防止受潮、受熱，運輸過程中防止雨淋受潮，應(yīng)與有毒物品隔離。
| 質(zhì)量指標(biāo) | 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.
