过磷酸钙的质量标准为中华人民共和国化工行业的推荐标准HG 2740－1995，具体的技术要求  （%）如下：

                项    目                                                                                               指   标
                                                                                优等品                      一等品                                 合格品
                                                                                                                                                        Ⅰ              Ⅱ
                 外观                                                                                      有色疏松状物
         有效五氧化二磷（P2O5）含量   ≥            18.0                          16.0                             14.0           12.0
            游离酸（以P2O5计）含量      ≤               5.0                           5.5                                5.5              5.5
                水分                                       ≤               12.0                         14.0                              14.0           15.0