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:

IDENTIFICATION	POSITIVE
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/
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