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Appearance
|
White to off-white crystalline powder
|
|
Assay (By HPLC; on anhydrous basis)
|
98.0% –102.0%
|
|
Identification A (IR spectrum)
|
Conforms
|
|
Identification 'B'
|
Conforms
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Maleic acid
|
Max 0.1%
|
|
Malic acid
|
Max 1.5%
|
|
Residue on ignition
|
Max 0.1%
|
|
Water (by KF)
|
Max 0.5%
|