磷酸三钙几乎完全不溶于水，在稀酸中溶解也极为缓慢。所以，作为肥料，通常得把磷酸三钙转化为过磷酸钙。

It is practically insoluble in water and only very slowly soluble in diluted acids, so it is largely converted for fertilizing purposes into superphosphate.

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三料过磷酸钙简称：重钙(TSP)质量标准：HG 2219 - 2224 - 91性状：粒状固体，微酸性，外观呈灰白色或暗竭色。

Triple superphosphate Abbreviations: TSP (TSP) Quality Standard: HG2219-2224-91 Characters: granular solid, slightly acidic, look pale or dark colored exhaust.

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