Tadalnafil    cas:171596-29-5  Formula: C22H19N3O4


Product name : Tadalnafil 

(6R,12aR)-6-(benzo[d][1,3]dioxol-5-yl)-2-methyl-2,3,12,12a tetrahydropyrazino [1',2':1,6] pyrido[3,4b] indole1,4(6H,7H)-dione;

(6R,12aR)-6-(1,3-benzodioxol-5-yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1',2':1,6] pyrido[3,4-b]indole-1,4-dione;


other name : Cialis
CAS No.: 171596-29-5
Formula: C22H19N3O4

package :1kg/bag or 25kgs/drum

Appearance : White or almost white crystalline powder

Solubility : Practically insoluble in water, freely soluble in dimethyl sulfoxide, slightly soluble in methylene chloride

Melting point : 302℃~303℃


Identification
The infrared absorption spectrum is concordant with the reference spectrum

The principal peak in the chromatogram obtained with the test solution is similar in retention time and size to the principal peak in the chromatogram obtained with reference solution

Rotation : + 78.0°to + 84.0°
Impurities A, B and C    , Impurity  A, B and C≤0.1%

Loss on drying  ≤0.5%
Residue on ignition  ≤0.1%
Heavy metals ≤10ppm

Individual impurity≤0.1%
Total unknown impurity≤0.3%

Residual Solvents
Methanol;≤0.3%
EA≤0.5%
IPA≤0.5%
Methyl acetate≤0.5%
DCM≤0.06%
AceticAcid≤0.5%

Assay :98% ~ 102.0 % (dried substance).

The test results conform with EP 9/USP40 Specification.