Strontium Perchlorate is hygroscopic and has found use in sealed pyrotechnic devices where it produces a red colour.
It can be made by electrolysis.
Several hydrates exist, the dihydrate and possible a monohydrate. 3Sr(ClO4)2:2H2O also exists.
Its molecular weight is (anhydrous) 286.52

Solubility of Strontium Perchlorate
Temp.	Moles Sr(ClO4)2 per 1000gms. water
0	8.16
5	8.57
10	9.03
15	9.49
20	10.18
25	10.54
30	11.43
35	12.02
40	12.70

See Electrochemical Preparation of Strontium Perchlorate, PDF file, 450k.

See here for more solubility data.

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