Hangzhou VIWA Co., Ltd.
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   About us

VIWA pharma division is a professional supplier of active pharmaceutical ingredients and intermediates. We are specialized in R&D and custom manufacturing. Supported by our highly qualified team of professor and technicians, we have rich experience on a wide range of chemical reactions and fermentation from multi gram scale to hundred tons scale according to customers' requirement.

Our main products are cardiovascular, anti-diabetes, anti-cancer, steroid, anti-HIV and their intermediates, especially on oncology products.

Moreover, we are quite strong at regulatory issues. Our products have been marketed in USA, Europe, Latin America, India, Vietnam, Turkey, etc.
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Product List  

Aripiprazole

Application

Aripiprazole

Intermediates

1-(2,3-Dichloro-phenyl)-piperazine hydrobromide


Application

Aripiprazole

Intermediates

7-(4-Bromo-butoxy)-3,4-dihydro-2(1H)-quinolinone


Application

Aripiprazole

CAS No.

22246-18-0

Structure

Intermediates

7-Hydroxy-3,4-dihydro-2(1H)Quinolinone


Application

Aripiprazole

CAS No.

41202-77-1

Structure

Intermediates

1-(2,3-Dichlorophenyl) piperazine hydrochloride

Aripiprazole

Chemical name : 7-{4-[4-(2,3-dichlorophenyl)-1-piperazinyl]-butoxy}-3,4-dihydro-2(1H)-quinolinone
Specification :
Characteristic : white crystalline powder
Assay(HPLC) : 99.5%min
Individual impurity : 0.1%max
Total impurity : 0.5%max
Melting point : 135~140 degree C

 
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