Theophylline
Synonyms:
- 1,3-dimethyl-3,4,5,7-tetrahydro-1H-purine-2,6-dione
CAS: 58-55-9
Molecular Formula: C7H10N4O2
Molecular Weight: 182.1799
Characteristics: A white crystalline powder
Identification: Positive reaction
Clarity and color of solution: Clear, colorless
Heavy metals: < 20 ppm
Acidity: 50 ml of solution S consumes 0.01 mal/l NaOH <1ml
Related Substances: < 0.5%
Organic Volatile Impurities: Meet requirements
Melting range: 270 ~ 274ºC
Loss on drying: < 0.5%
Assay: 97.0 ~ 102.0%
