一、化学名：磷酸镁
二、分子式：mg3(po4) 2·xh2o
三、分子量：无水物：262.87
四、cas：7757-87-1
五、性状：白色结晶性粉末。可分为含有四、五或八个分子结合水的三种磷酸镁。易溶于稀无机酸，几乎不溶于水。
六、用途：在食品工业中作营养增补剂，稳定剂、ph调节剂、抗结剂；在其他工业中作沉淀剂使用，牙科研磨剂。
七、包装：内衬聚乙烯塑料袋，外套塑料编织袋，每袋25kg。
八、贮存与运输：本品应贮存在干燥通风清洁的库房中，装载运输时要轻装轻放，防止包装破损，防止受潮、受热，运输过程中防止雨淋受潮，应与有毒物品隔离。
| 质量指标 | specification | fcc vii |
| 含量（mg3(po4) 2 ，灼烧干基计）， w/% | content(mg3(po4) 2,ignited basis),w/% | 96.0-101.5 |
| 砷（as），mg/kg ≤ | arsenic(as),mg/kg ≤ | 3 |
| 氟化物（f），mg/kg ≤ | fluorides(f),mg/kg ≤ | 25 |
| 铅（pb），mg/kg ≤ | lead(pb),mg/kg ≤ | 2 |
| 灼烧失重（425℃），w/% | loss on ignition (425℃),w/% | 30.0-37.0 (8h2o)
20.0-27.0 (5h2o) 15.0-23.0 (4h2o) |
1、chemical name: trimagnesium phosphate
2、molecular formula: mg3(po4) 2·xh2o
3、molecular weight: anhydrous:262.87
4、cas: 7757-87-1
5、character: it occurs as white, crystalline powder. it may contain four, five or eight hydrates. it’s readily soluble in dilute mineral acids, but almost insoluble in water.
6、usage: nutrient
7、packing: it is packed with polyethylene bag as inner layer, and a compound plastic woven bag as outer layer. the net weight of each bag is 25kg.
8、storage and transport: 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.