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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Sofosbuvir, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Sofosbuvir impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Sofosbuvir-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Sofosbuvir Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2’-Defluro-2’-hydroxy 2’-epi-Sofosbuvir-13Cd3 Stable Isotopes CS-T-96982 Not Available Enquire
Sofosbuvir Metabolite GS-331007-13C,d3 Stable Isotopes CS-O-30476 1256490-42-2 In Stock
Sofosbuvir Metabolite GS-566500-13C,d3 Stable Isotopes CS-O-30478 1256490-46-6 In Stock
Sofosbuvir-d6 Stable Isotopes CS-O-10984 1868135-06-1 In Stock
Sofosbuvir 13CD3 Stable Isotopes CS-O-30474 2070009-25-3 Enquire
Sofosbuvir Met. D-13C-15N2 Stable Isotopes CS-BU-00073 863329-66-2 (Unlabeled) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sofosbuvir API CS-O-30473 1190307-88-0 In Stock
Sofosbuvir Polymorphic Form 6 API CS-O-11237 Not Available Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sofosbuvir metabolite GS331007 Metabolite CS-O-30475 863329-66-2 In Stock
Sofosbuvir metabolite GS-566500 Metabolite CS-O-30477 1233335-78-8 In Stock
1-((2S,3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxymethyl)-3-meth... Metabolite CS-O-40210 2041584-99-8 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(2S,3R)-Ethyl 3-((R)-2,2-Dimethyl-1,3-Dioxolan-4-yl)-2,3-Dih... Impurity CS-O-15605 93635-76-8 In Stock
(R)-Sofosbuvir Pentafluorophenoxy Analogue Impurity CS-O-11149 1334513-02-8 In Stock
2-Alkene Sofosbuvir Impurity CS-O-15606 2095551-20-3 Enquire
Ethyl (4S,5R)-5-[(4R)-2,2-Dimethyl-1,3-Dioxolan-4-yl]-4-Meth... Impurity CS-O-15712 879551-01-6 Enquire
Ethyl sofosbuvir Impurity CS-O-11152 1064684-30-5 In Stock
Isopropyl N-[chloro(phenoxy)phosphoryl]-L-alaninate Impurity CS-O-14004 261909-49-3 In Stock
L-Alanine Isopropyl Ester Hydrochloride Impurity CS-G-00131 62062-65-1 In Stock
O-Desphenyl Sofosbuvir Impurity CS-T-73645 1233335-82-4 Enquire
Pentafluoro Sofosbuvir Impurity Impurity CS-O-40464 1337529-56-2 Enquire
Sofosbuvir 3,5-dibenzoate inmurity Impurity CS-O-32141 874638-80-9 In Stock
Sofosbuvir 3’,5’-Bis-(S)-phosphate Impurity CS-T-84999 1337482-17-3 Enquire
Sofosbuvir 3’Analogue Impurity CS-O-52904 1256490-28-4 Enquire
Sofosbuvir Acid Impurity CS-EO-03173 1859162-79-0 Enquire
Sofosbuvir Chloro Analogue Impurity CS-O-11153 1496552-51-2 Enquire
Sofosbuvir D-Alaninate Impurity CS-O-11150 1064684-71-4 In Stock
Sofosbuvir Degradation Impurity 1 Impurity CS-O-14747 1015073-43-4 Enquire
Sofosbuvir Des L-​Alanine Impurity CS-O-43898 1859162-80-3 Enquire
Sofosbuvir Dimer Impurity CS-O-11148 1256490-29-5 In Stock
Sofosbuvir Impurity Impurity CS-O-16052 1351925-15-9 In Stock
Sofosbuvir Impurity 11 Impurity CS-O-47961 1987950-05-9 Enquire
Sofosbuvir impurity 19 Impurity CS-DG-00022 1337482-15-1 Enquire
Sofosbuvir Impurity 22 Impurity CS-EO-03122 Not Available Enquire
Sofosbuvir Impurity 94 Impurity CS-SN-00164 1064684-44-1 Enquire
Sofosbuvir intermediate isomer Impurity Impurity CS-O-43897 1946820-96-7 Enquire
sofosbuvir isomer 1 (2R,3R,4R,5S-isomer) Impurity CS-O-59316 ---- Enquire
sofosbuvir isomer 17 (D-Alanine-2R,3R,4R,5S-isomer) Impurity CS-O-59317 ---- Enquire
Sofosbuvir L-alanitate (Mixture of Diasteriomers) Impurity CS-O-14752 1190308-01-0 In Stock
(2R)-2-Deoxy-2-fluoro-2-methyl-a-D-erythro-pentofuranosyl Ch... Impurity CS-T-73615 1199809-23-8 Enquire
(2R)-2-Deoxy-2-fluoro-2-methyl-ß-D-erythro-pentofuranosyl Ch... Impurity CS-T-73449 1500076-79-8 Enquire
(2R,3R,4R,5R)-5-(4-benzamido-2-oxopyrimidin-1(2H)-yl)-2-((be... Impurity CS-N-05199 1496551-70-2 Enquire
(2S)-isopropyl-2-(((((2R,3S,5R)-5-(2,4-dioxo-3,4-dihydropyri... Impurity CS-T-93933 2095551-20-3 Enquire
(3R,4R,5R)-3-Fluoro-4-hydroxy-5-(hydroxymethyl)-3-methyldihy... Impurity CS-T-75426 879551-04-9 Enquire
(S)-Sofosbuvir Pentafluorophenoxy Analogue Impurity CS-O-14745 1256490-52-4 Enquire
2(R)-Methyl Sofosbuvir Impurity CS-T-92617 1496552-28-3 Enquire
2’-Deoxy-2’-methyleneuridine Impurity CS-T-73118 119410-95-6 Enquire
3,5-di-O-benzoyl-2-deoxy-2-chloro-2-C-methyl-D-ribono-γ-lact... Impurity CS-N-05197 1496551-65-5 Enquire
Chloro (R)-Phosphoryl Sofosbuvir Impurity CS-T-72809 1496552-50-1 Enquire
Chloro Sofosbuvir Desphosphate Impurity CS-O-15621 1496551-72-4 Enquire
Sofosbuvir Benzoyl Cytidine Impurity CS-O-32142 817204-32-3 Enquire
Sofosbuvir impurity 12 Impurity CS-DG-00023 114262-49-6 Enquire
Sofosbuvir impurity 3 Impurity CS-DG-00027 863329-62-8 Enquire
Sofosbuvir impurity 32 Impurity CS-DG-00021 1157884-58-6 Enquire
Sofosbuvir impurity 43 Impurity CS-DG-00020 1520010-86-9(Freeacid) Enquire
Sofosbuvir impurity 5 Impurity CS-DG-00026 863329-63-9 Enquire
Sofosbuvir impurity 6 Impurity CS-DG-00025 874638-94-5 Enquire
Sofosbuvir impurity 9 Impurity CS-DG-00024 944476-44-2 Enquire
Sofosbuvir impurity A Impurity CS-BX-02780 1496552-16-9 Enquire
Sofosbuvir Impurity D Impurity CS-O-33875 Not Available Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Methyl-2-propenoic acid ethyl ester Fine Chemicals CS-O-15603 81997-76-4 In Stock
4-Nitrophenyl phosphorodichloridate Fine Chemicals CS-O-11294 777-52-6 In Stock
pentafluorophenol Fine Chemicals CS-T-39076 771-61-9 In Stock