一、化學(xué)名:?磷酸氫二鉀
二、分子式:?K2HPO4,K2HPO4· 3H2O
三、分子量:?無(wú)水物:174.18;三水物:228.22
四、CAS: 無(wú)水物:7758-11-4;三水物:16788-57-1
五、性狀:無(wú)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。
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(fēng)清潔的庫房中,裝載運輸時(shí)要輕裝輕放,防止包裝破損,防止受潮、受熱,運輸過(guò)程中防止雨淋受潮,應與有毒物品隔離。
質(zhì)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 | ——— |