Aldehyde; 1,3-dimethyl-3,7-dihydro-1H-purine-2,6-dione; dioxymethylpurine; 1,3-bis Methyl xanthine; hydrated tea leaves;
【English name】: Theophylline
[CAS No.]: 58-55-9
【EINECS】: 200-385-7
Molecular formula: C7H10N4O2
[Molecular weight]: 182.1799
Density: 1.62g / cm3
Melting point: 270-274 ° C
[Boiling point]: 390.1 ° C at 760 mmHg
[Flash point]: 189.7 ° C
【Water solubility】: 8.3 g / L (20 ℃)
【Steam pressure】: 2.72E-06mmHg at 25 ° C
Solubility: 0.1 M HCl: soluble
[Water solubility]: 8.3 g / L (20 ° C)
【Storage conditions】: 2-8 ° C
【Solubility】: soluble in water at room temperature (1: 120), ethanol (1:18), chloroform (1: 86), hydrochloric acid, ammonia, dilute hydrochloric acid and dilute nitric acid.
【Appearance】: white crystal or crystalline powder, odorless, bitter taste.
[Quality] Standard: BP / CP / USP
【Packing: 25KG / cardboard drum (37 * 50)
【Residue on ignition】: ≤ 0.1%
【Total Impurities】 ≤0.5%
[Any single magazine] ≤ 0.1%
[Water] ≤ 9.5%
[Anhydrous] ≤ 0.5%
【Content】: ≥99.0%
【Uses】: methyl purine drugs. With cardiac, diuretic, dilated coronary artery, relaxation of bronchial smooth muscle and excitement of the central system by the role. Mainly used for the treatment of bronchial asthma, emphysema, bronchitis, cardiac dyspnea.
【Usage】 used as pharmaceutical intermediates
【Uses】 mainly used for the treatment of bronchial and cardiac asthma, can also be used for cardiac edema
[Production method] 1,3-dimethyl-4-amino-5-carboxamide urea and sodium hydroxide solution at 90-95 ° C reaction, obtained theophylline crude, recrystallized by hot water, activated carbon decolorization Finished product.
【Production methods】 ethyl cyanoacetate and dimethyl urea as raw materials, by condensation, nitrosation, reduction, formylation, cyclization reaction was crude, and then recrystallization derived.
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