THEOPHYLINE
ANHYDROUS
SYNONYM: 1,3-DIMETHYLXANTHINE
FORMULA: C7H8N4O2
M. W.: 180.27
CAS NO.: 58-55-9
GRADE: USP24, BP98
DESCRIPTION: IT IS WHITE CRYSTALLINE POWDER.
SPECIFICATIONS:
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IDENTIFICATION
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POSITIVE
|
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MELTING POINT
|
270-274℃
|
|
CLARITY AND COLOUR OF SOLUTION
|
B9 MAX. (BP1998)
|
|
ACIDITY 0.01M NaOH (BP98)
0.02N NaOH (USP24)
|
1ml MAX.
1ml MAX.
|
|
HEAVY METALS
|
20ppm MAX/
|
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RELATED SUBSTANCES
|
0.5% MAX. (BP98)
|
|
LOSS ON DRYING
|
0.5% MAX.
|
|
RESIDUE ON IGNATION
|
0.1% MAX. (BP98)
0.15% MAX. (USP24)
|
|
ASSAY (DRIED BASIS)
|
99-102% (BP98)
97-102% (USP24)
|
PACKING: 25kg/carton
drum
