Lot. No. of
representative samples

Subtype

Content of CPZ-Na (%)

Initial

Final

Reduction

K000402

91.0

84.3

6.7

0004020

90.9

84.5

6.4

95835063

90.3

83.9

6.4

95835064

89.6

83.1

6.5

000301

91.1

81.8

9.3

991109

91.3

82.1

9.2

Table 4: Chemical stability of different subtypes of crystal form A of CPZ-Na at room temperature.
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