焦磷酸钾

别名:焦磷酸钾
分子式：K₄P₂O₇
性状说明：焦磷酸钾，是一种无机化合物，化学式为K4P2O7，为白色粉末，溶于水，不溶于乙醇；焦磷酸钾通常呈白色或略带浅黄色的结晶粉末，无味或略带浅咸味。它在水中的溶解度较高，可以形成透明的水溶液。焦磷酸钾是一种强碱性盐，它在水溶液中能够离解出K+和P2O74-离子。它具有一定的氧化性，但在常温下相对稳定，不易发生化学反应。

执行标准：GB 1886.340-2021

执行指标：

感官要求

项目	要求	检测方法
色泽	白色	取适量试样置于５０ｍＬ烧杯中，在自然光下观察色泽和状态
状态	粉末或颗粒	取适量试样置于５０ｍＬ烧杯中，在自然光下观察色泽和状态

理化指标

项目	要求
焦磷酸四钾（Ｋ_４Ｐ_２Ｏ_７）（以干基计）含量，ω／％≥	95.0
灼烧减量，ω／％ ≤	0.5
水不溶物，ω／％ ≤	0.1
ｐＨ（１０ｇ／Ｌ水溶液）	10.5±0.5
氟（Ｆ）／（ｍｇ／ｋｇ） ≤	10.0
铅（Ｐｂ）／（ｍｇ／ｋｇ） ≤	2.0
砷（Ａｓ）／（ｍｇ／ｋｇ） ≤	3.0
重金属（以Ｐｂ计）／（ｍｇ／ｋｇ） ≤	10

用途：焦磷酸钾在电镀工业中的应用：在电镀工业中，焦磷酸钾常作为电镀液的组成部分，特别是在镀锌、镀铜等过程中。它能够提供稳定的电镀环境，促进金属离子的沉积，从而得到质量均匀、致密的金属镀层。焦磷酸钾在食品工业中的应用：在食品工业中，焦磷酸钾可以用作食品添加剂，如作为面团改良剂，能够改善面团的韧性和弹性，使面制品口感更加筋道。同时，它还可以用作防腐剂，延长食品的保质期。磷酸钾在清洁剂中的应用：焦磷酸钾在清洁剂中用作去污剂和表面活性剂，能够与油污、水垢等发生反应，使其易于被水冲洗掉。它在家庭清洁用品、工业清洗剂等中都有广泛的应用。焦磷酸钾在化妆品和其他行业的应用：在化妆品行业，焦磷酸钾可以作为配方成分，用于调节产品的酸碱度，提高产品的稳定性。此外，它还可以用于牙膏、洗发水等产品的研发中，发挥其清洁和保健功能。除了以上行业外，焦磷酸钾还在医药、农业等领域有所应用。

注：食品级焦磷酸钾在使用和储存、运输等过程中需严格按照食品安全管理相关内容执行。

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