Sofosbuvir impurities - New development in our R&D

Synthink Research Chemicals is specialized in providing API impurities, intermediates compounds.

Recently after a long research & efforts, we have synthesized impurities of Sofosbuvir API.

We have supplied the Sofosbuvir impurities to some of our regular clients and some new clients.

We take challenges in R&D work in new API synthesis and always strive to obtain highest quality material.

We make sure that our products are reaching the end user safely and on time to enhance a long term business relationship with sourcing, analytical, R &D depts. of the client.


Following are the list of Sofosbuvir impurities we have in-stock;

Sofosbuvir alpha isomer

2'-S-Fluoro sofosbuvir

1. Sofosbuvir (CAS Number :1190307-88-0)
2. Sofosbuvir α-isomer
3. 2-R-Methyl SofosbuvirO-Desphenyl sofosbuvir
4. RP-isomer of sofosbuvir
5. 2'-S-Fluoro sofosbuvir
6. Sofosbuvir 3',5'-Bis-O-Phosphoramidate
7. Sofosbuvir 3'-O-Phosphoramidate 
8. 2'-Hydroxy Sofosbuvir
9. 2'-Keto Sofosbuvir
10. 2'-Alkene Sofosbuvir
11. Sofosbuvir Chloro Analog

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Fulvestrant Impurities Manufcturer - Synthink Research Chemicals

We are expertise in manufacturing (Synthesis) of Fulvestrant impurities & reference standards.

We have developed below Fulvestrant impurities in our Laboratory.

1)  6-Keto Fulvestrant
2)  7β-Fulvestrant
3)  ∆6-Fulvestrant
4)  Fulvestrant Extended
5) Fulvestrant 9-Sulfone
6) Fulvestrant 17-Ketone
7) 3-O-Methyl Fulvestrant
8) Fulvestrant Sterol Dimer


Synthink Research Chemicals is the manufacturer and supplier of certified impurity.

We provide all characterization data like HPLC, MS, NMR, IR, RT , RRT along with Certificate of analysis.

We are manufacturer and supplier of API impurities which are used for ANDA filing/DMF filing.
We provide certified API impurities which is used as raw material to prepare working standards.

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Please send your inquiry at info@synthinkchemicals.com

For more details pleas contact on :8007179444