The microcosmic salt is

The microcosmic salt is

A
$Na ({NH}_{4}) H_{2} O$
B
$K ({NH}_{4}) {HPO}_{3} 2 H_{2} O$
C
$Na ({NH}_{4}) {HPO}_{4} 4 H_{2} O)$
D
$Na ({NH}_{3}) {HPO}_{4} 4 H_{2} O$

Solution:

$Na ({NH}_{4}) {HPO}_{4} \cdot 4 H_{2} O$ (Microcosmic salt).

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