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三水磷酸氫二鉀

一、化學名：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：內襯聚乙烯塑料袋，外套復合塑料編織袋包裝，每袋凈重25kg。

八、貯存與運輸：本品應貯存在干燥通風清潔的庫房中，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，應與有毒物品隔離。

質量指標SpecificationGB 1886.334-2021FCC VII
含量（以干基計），w/%     ≥Content(On dry basis), w/%      ≥98.098.0
砷（As），mg/kg           ≤Arsenic(As),mg/kg             ≤3.03.0
氟化物（以F計），mg/kg    ≤Fluoride(as F),mg/kg           ≤10.010.0
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/%≤0.20.2
鉛（Pb），mg/kg           ≤Lead (Pb),mg/kg              ≤2.02.0
干燥減量，w/%K2HPO4  ≤Loss on drying,w/% K2HPO4       ≤2.02.0
K2HPO4·H2OLoss on drying,w/% K2HPO4·H2O22.0-26.0———
pH值（10g/L溶液）pH value (10g/L Solution )9.0±0.4———

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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.