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Tadalafil Impurity

Veeprho Laboratories is a manufacturer and supplier of Tadalafil Impurity-(6R, 12aS) / 6R, 12aS Diastereomer / Tadalafil Impurity A, Tadalafil Impurity-(6S, 12aS) / 6S, 12aS Enantiomer / Tadalafil Impurity B, Tadalafil Impurity-(6S, 12aR) / 6S,12aR Diastereomer / Tadalafil Impurity C, Tadalafil N-Methyl, Tadalafil Impurity A (In House), Tadalafil Impurity B (In House) and Tadalafil Impurity C (In House), Tadalafil Process Impurity, Tadalafil Degradation Impurity, Tadalafil Related Compound and Tadalafil Potential Impurity. These impurities are provided with certificate of analysis along with the characterization data like NMR MASS IR and HPLC Purity. We also provide additional data like C NMR, CHN, TGA RF on request.


We are also manufacturer and supplier of all Tadalafil USP, EP, BP pharmacopoeia impurities, any unknown impurity, APIs and intermediates with structure elucidation with help of C NMR, H NMR, MASS, CHN, HPLC data. On request we also manufacture and supply all impurity of Tadalafil as per pharmacopoeia RRT.


We also manufacture and supply all Tadalafil impurities which are to be isolated by preparative HPLC and Lyophilized.


All the Tadalafil impurities like Tadalafil Impurity-(6R, 12aS) / 6R, 12aS Diastereomer / Tadalafil Impurity A, Tadalafil Impurity-(6S, 12aS) / 6S, 12aS Enantiomer / Tadalafil Impurity B, Tadalafil Impurity-(6S, 12aR) / 6S,12aR Diastereomer / Tadalafil Impurity C, Tadalafil N-Methyl, Tadalafil Impurity A (In House), Tadalafil Impurity B (In House) and Tadalafil Impurity C (In House) are manufactured and supplied by Veeprho Laboratories are acceptable to all regulatory agencies in the world like US-FDA, MHRA, MCC, WHO, Brazil and Japan.


These Tadalafil impurities are also used for ANDA filling/DMF filling and genotoxic study.


Tadalafil impurity – (6S,12aS) : CAS No. 629652-72-8

Tadalafil impurity – (6R,12aS) : CAS No. 171596-27-3

Tadalafil impurity – (6S,12aR) : CAS No. 171596-28-4


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Tadalafil impurity-(6R, 12aS)/6R, 12aS Diastereomer/Impurity A
Tadalafil impurity-(6R, 12aS)/6R, 12aS Diastereomer/Impurity A

(6R,12aS)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methyl-pyrazino[1’ ,2’ :1,6]pyrido[3,4-b]indole-1,4-dione.

Catalogue No : VL300003

Tadalafil impurity-(6S, 12aS)/6S, 12aS Enantiomer/ Impurity B
Tadalafil impurity-(6S, 12aS)/6S, 12aS Enantiomer/ Impurity B

(6S,12aS)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methylpyrazino[ 1’ ,2’ :1,6]pyrido[3,4-b]indole-1,4-dione.

Catalogue No : VL300001

Tadalafil impurity-(6S, 12aR)/6S,12aR Diastereomer/ Impurity C
Tadalafil impurity-(6S, 12aR)/6S,12aR Diastereomer/ Impurity C

(6S,12aR)-6-(1,3-Benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methylpyrazino[ 1’ ,2’ :1,6]pyrido[3,4-b]indole-1,4-dione.

Catalogue No : VL300002

Tadalafil N-Methyl
Tadalafil N-Methyl

(6S,12aR)-6-[benzo[d][1,3]dioxol-5-yl)-2,7-dimethyl-2,3,12,12a-tetrahydropyrazino[1’ ,2’ .1,6] pyrido[3,4-b]indole-1,4(6H,7H)-dione

Catalogue No : VL300004

Tadalafil Impurity A (In House)
Tadalafil Impurity A (In House)

benzo[d][1,3]dioxole-5-carbaldehyde

Catalogue No : VL300007

Tadalafil Impurity B (In-House)
Tadalafil Impurity B (In-House)

(6R,12aS)-6-(1,3-benzodioxal-5yl)-2-methyl-2,3,6,7,12,12a-hexahydropyrazino[1’ , 2’ :1,6]pyrido[3,4-b]-1,4-dione

Catalogue No : VL300008

Tadalafil Impurity C (In House)
Tadalafil Impurity C (In House)

(1R,3R)-Methyl-1-(Benzo[d][1,3]dioxol-5-yl)-2-(2-chloroacetyl)-2,3,4,9-tetrahydro- 1H-pyrido[3,4-b]indole-3-carboxylate

Catalogue No : VL300009