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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Atorvastatin, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Atorvastatin 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 Atorvastatin-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.

Atorvastatin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(6-{2-[3-(4-Phenylcarbamoyl)-5-(4-fluoro-phenyl)-2-isopropyl... Stable Isotopes CS-T-94380 265989-34-2 Enquire
[13C6]-o-Hydroxyatorvastatin Stable Isotopes CS-EK-01949 214217-86-4unlabeled Enquire
2-Benzyloxy Atorvastatin-d5 Acetonide tert-Butyl Ester Stable Isotopes CS-T-49020 265989-41-1 Enquire
2-Fluoro Atorvastatin Sodium Salt-d5 Stable Isotopes CS-T-97506 Not Available Enquire
2-hydroxy Atorvastatin D5 Stable Isotopes CS-EO-02936 777841-55-1 Enquire
2-Hydroxy Atorvastatin Lactone-d5 Stable Isotopes CS-T-55832 265989-50-2 In Stock
2-Hydroxy Atorvastatin tert-Butyl Ester-d5 Stable Isotopes CS-T-97452 Not Available Enquire
2-Hydroxy Atorvastatin-D5 Acetonide tert-Butyl Ester Stable Isotopes CS-T-54902 265989-42-2 Enquire
2-Hydroxy Atorvastatin-d5 Calcium Stable Isotopes CS-O-00659 265989-47-7 In Stock
3-Fluoro Atorvastatin Sodium Salt-d5 Stable Isotopes CS-T-97505 Not Available Enquire
4-Benzyloxy Atorvastatin-d5 Acetonide tert-Butyl Ester Stable Isotopes CS-T-49022 265989-37-5 Enquire
4-hydroxy Atorvastatin D5 Stable Isotopes CS-EO-02935 Not Available Enquire
4-Hydroxy Atorvastatin Lactone D5 Stable Isotopes CS-T-55833 265989-49-9 Enquire
4-Hydroxy Atorvastatin-d5 Acetonide tert-Butyl Ester Stable Isotopes CS-T-54918 265989-38-6 Enquire
4-Hydroxy Atorvastatin-d5 Calcium Stable Isotopes CS-O-14019 265989-45-5 In Stock
5-Dehydroxy (3S)-Atorvastatin-d5 Stable Isotopes CS-T-101614 Not Available Enquire
Atorvastatin D5 Stable Isotopes CS-EO-02934 749193-45-1 Enquire
Atorvastatin D5 sodium Stable Isotopes CS-CV-00005 134523-01-6 (Unlabelled) Enquire
Atorvastatin sodium salt 13C6 Stable Isotopes CS-EK-02903 134523-01-6 (Unlabelled) Enquire
Atorvastatin-d5 (N-(phenyl-d5) Lactone Stable Isotopes CS-TA-20572 265989-48-8 Enquire
Atorvastatin-d5 Calcium Stable Isotopes CS-O-01265 222412-82-0 In Stock
Atorvastatin-d5 Lactone (4-phenyl-d5) Stable Isotopes CS-O-14387 125995-03-1(Unlabeled) Enquire
Atorvastatin-d5 Sodium Salt Stable Isotopes CS-TA-20565 222412-87-5 Enquire
Atorvastatin-d5 tert-Butyl Ester Stable Isotopes CS-T-97776 Not Available Enquire
p-Hydroxyatorvastatin 13C6 Stable Isotopes CS-EK-00334 214217-88-6 unlabeled Enquire
tert-Butyl-4-hydroxy Atorvastatin-d5 Stable Isotopes CS-T-100712 Not Available Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Atorvastatin API Standards CS-O-07282 134523-00-5 In Stock
Atorvastatin Calcium Salt API Standards CS-O-05661 134523-03-8 In Stock
Atorvastatin Calcium Trihydrate API Standards CS-O-07283 344423-98-9 In Stock


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Hydroxy Atorvastatin bis sodium salt Metabolites CS-O-06085 1581251-44-6 In Stock
2-Hydroxy Atorvastatin Calcium Salt Metabolites CS-O-14020 265989-46-6 In Stock
2-Hydroxy Atorvastatin Dihydrate Monosodium Salt Metabolites CS-O-07309 1421760-64-6 Enquire
2-Hydroxy Atorvastatin Lactone Metabolites CS-O-14406 163217-74-1 In Stock
3-Oxo Atorvastatin tert-Butyl Ester Metabolites CS-P-07052 134394-98-2 Enquire
4-Hydroxy Atorvastatin Lactone Metabolites CS-O-07274 163217-70-7 In Stock
Atorvastatin 3-Oxo Sodium Salt Metabolites CS-P-03226 Not Available Enquire
Atorvastatin impurity H Metabolites CS-O-07292 125995-03-1 In Stock
rac-3-Oxo Atorvastatin Sodium Salt Metabolites CS-O-07265 1391052-00-8 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"Atorvastatin (3R,5S)-Isomer Sodium Salt" Impurities CS-O-07268 131275-93-9 Enquire
(3R,5S)-Atorvastatin Impurities CS-EO-03339 651770-09-1 Enquire
(3R,5S)-Atorvastatin Acetonide tert-Butyl Ester Impurities CS-TA-20608 947249-30-1 Enquire
(3R,5S)-Atorvastatin Calcium salt Impurities CS-EO-02022 1312366-79-2 Enquire
(3S,5R)-atorvastatin Impurities CS-EO-01333 887324-52-9 Enquire
(3S,5R)-Atorvastatin Calcium Impurities CS-O-20027 887196-25-0 In Stock
(3S,5S)-Atorvastatin Calcium Salt Impurities CS-T-48403 1105067-88-6 In Stock
(3S,5S)-Atorvastatin Calcium Salt Trihydrate Impurities CS-O-36421 Not Available Enquire
(3S,5S)-Atorvastatin Sodium Impurities CS-ED-11746 1428118-38-0 In Stock
2- Fluoro Atorvastatin Impurities CS-O-14424 Not Available Enquire
2,2-dibromo-1-(4-fluorophenyl)-2-phenylethanone Impurities CS-O-40348 2514955-94-1 In Stock
2,2-dichloro-1-(4-fluorophenyl)-2-phenylethanone Impurities CS-O-37179 1403667-07-1 In Stock
2-Hydroxy Atorvastatin Impurities CS-MM-60170 214217-86-4 Enquire
2-Hydroxy Atorvastatin tert-Butyl Ester Impurities CS-T-78426 1346599-89-0 Enquire
3- Fluoro Atorvastatin Impurities CS-O-14425 Not Available Enquire
3-Des Hydroxy Atorvastatin Impurities CS-O-37963 Not Available Enquire
3-O-methyl Atorvastatin Impurities CS-O-14631 887324-53-0 In Stock
3-OXO ATORVASTATIN Impurities CS-ED-41471 Not Available Enquire
3-Oxo Atorvastatin Calcium Impurities CS-O-15197 887196-30-7(free base) Enquire
3-Oxo Atorvastatin Methyl Ester Impurities CS-O-07273 2206606-73-5 Enquire
4-Fluoro Atorvastatin Calcium Salt Impurities CS-P-07059 693793-42-9 Enquire
4-Hydroxy Atorvastatin Calcium Impurities CS-O-14647 265989-44-4 In Stock
4-Hydroxy Atorvastatin Disodium Salt Impurities CS-O-07266 1276537-18-8 In Stock
4-Hydroxy Atorvastatin Hemicalcium Salt Impurities CS-T-79380 1263176-34-6 In Stock
4-Hydroxy Atorvastatin Monosodium Salt Impurities CS-O-06084 163217-71-8 Enquire
5-Dehydroxy (3S)-Atorvastatin Impurities CS-T-73405 887196-26-1 In Stock
5-Oxo Atorvastatin Impurities CS-O-07267 1391052-82-6 Enquire
Allyl Ester of Atorvastatin Cyclic (Fluorophenyl) Impurity Impurities CS-T-48409 1316643-57-8 Enquire
Allyl Ester of Atorvastatin Cyclic (Isopropyl) Impurity Impurities CS-T-48410 1316295-72-3 Enquire
Atorvastatin 2-Fluoro Analog Impurities CS-P-03224 1346746-49-3 In Stock
Atorvastatin 2-Fluoro t-Butyl Ester Impurities CS-O-15198 1099474-28-8 In Stock
Atorvastatin 2-Hydroxy Sodium Impurities CS-EO-00300 163217-75-2 Enquire
Atorvastatin 3-Deoxy-Hept-2-Enoic Acid Ethyl Ester Impurities CS-O-07271 1624328-52-4 Enquire
Atorvastatin 3-Deoxyhept-2Z-Enoic Acid Sodium Salt Impurities CS-P-07058 1659317-56-2 Enquire
Atorvastatin 3-Fluoro Analog Impurities CS-P-03225 Not Available In Stock
Atorvastatin 5-O-Methyl Sodium Impurities CS-O-07275 Not Available Enquire
Atorvastatin Acetonide Impurities CS-O-07276 581772-29-4 In Stock
Atorvastatin Acetonide Methyl Ester Impurities CS-O-15340 1353049-81-6 Enquire
Atorvastatin Acid Methyl Ester Impurities CS-O-07280 345891-62-5 In Stock
Atorvastatin Acid Sodium salt Impurities CS-EO-03340 134523-01-6 Enquire
Atorvastatin Acid t-Butyl Ester Impurities CS-O-07281 134395-00-9 In Stock
Atorvastatin Allyl Ester Impurities CS-T-48400 915092-85-2 Enquire
Atorvastatin Amide Impurity Impurities CS-EO-01906 2125501-02-0 In Stock
Atorvastatin Amlodipine Dimer Impurities CS-P-03227 Not Available Enquire
Atorvastatin Calcium Propylene Glycol Solvate Impurities CS-EO-03347 1040350-07-9 Enquire
Atorvastatin Cyclic (Fluorophenyl) Impurity Impurities CS-P-07054 873950-18-6 In Stock
Atorvastatin Cyclic (Fluorophenyl) Sodium Impurities CS-O-15160 1315629-79-8 In Stock
Atorvastatin Cyclic Fluorophenyl calcium Salt Impurity Impurities CS-O-49960 873950-18-6(Free Base) Enquire
Atorvastatin Dehydro Acid Sodium Impurities CS-O-07272 1105067-93-3(FreeAcid) In Stock
Atorvastatin Dehydro Lactone Impurities CS-P-07050 442851-50-5 In Stock
Atorvastatin Di-acetonide tert-Butyl Ester Impurities CS-T-102321 1116118-82-1 Enquire
Atorvastatin diacid impurity Impurities CS-T-68872 1821498-27-4 Enquire
Atorvastatin Diamino impurity Impurities CS-O-47422 2299304-89-3 Enquire
Atorvastatin Diepoxide Calcium Salt Impurities CS-EO-01907 1807481-01-1 In Stock
Atorvastatin Diepoxide Impurity Impurities CS-EO-00023 887470-43-1 In Stock
Atorvastatin Diketoene Impurity Impurities CS-P-07061 1331869-19-2 Enquire
Atorvastatin diol Methyl ester impurity Impurities CS-O-38514 Not Available Enquire
Atorvastatin EP Impurity A Impurities CS-O-07285 433289-83-9 In Stock
Atorvastatin EP Impurity B Impurities CS-EO-01596 842103-12-2 In Stock
Atorvastatin EP Impurity B Calcium salt Impurities CS-EO-03346 840528-19-0 Enquire
Atorvastatin EP Impurity C Impurities CS-O-07287 693793-53-2 In Stock
Atorvastatin EP Impurity C Sodium salt Impurities CS-EO-03343 1807481-00-0 Enquire
Atorvastatin EP Impurity D Impurities CS-O-07288 148146-51-4 In Stock
Atorvastatin EP Impurity E Sodium Impurities CS-O-07289 501121-34-2 (Free Acid) In Stock
Atorvastatin EP Impurity F Calcium Impurities CS-RS-00073 1105067-87-5 Enquire
Atorvastatin EP Impurity F Calcium Impurities CS-O-07290 1105067-87-5 In Stock
Atorvastatin EP Impurity G (3-O-methyl Atorvastatin calcium ... Impurities CS-O-07291 887196-29-4 In Stock
Atorvastatin EP Impurity G Sodium Salt Impurities CS-O-41208 Not Available In Stock
Atorvastatin EP Impurity I Impurities CS-O-07293 125971-95-1 In Stock
Atorvastatin EP Impurity J Impurities CS-P-07051 1105067-93-3 In Stock
Atorvastatin EP Impurity J (Calcium salt) Impurities CS-EO-03344 1105067-93-3 (Freebase) Enquire
Atorvastatin EP Impurity O Sodium salt Impurities CS-EO-03341 887196-30-7 (Freebase) Enquire
Atorvastatin EP Impurity P (Sodium salt) Impurities CS-EO-03342 862260-38-6 Enquire
Atorvastatin EP Impurity P calcium Salt Impurities CS-EO-02282 929540-41-0 Enquire
Atorvastatin EP Impurity Q sodium salt Impurities CS-O-44473 906552-18-9 (Freebase) Enquire
Atorvastatin Epoxy Pyrrolooxazin 6-Hydroxy Analog Impurities CS-P-07053 873950-17-5 In Stock
Atorvastatin epoxy pyrrolooxazin 7-hydroxy analog (3R-Hydrox... Impurities CS-O-34592 873950-18-6 (racemic) In Stock
Atorvastatin Epoxy Pyrrolooxazin 7-Hydroxy Analog Sodium Impurities CS-O-14629 1315629-79-8 In Stock
Atorvastatin Epoxy Pyrrolooxazin Analog (sodium salt) Impurities CS-O-14960 1316291-19-6 In Stock
Atorvastatin Epoxy Pyrrolooxazin Tricyclic Calcium Impurities CS-O-15072 Not Available In Stock
Atorvastatin Epoxy Tetrahydrofuran Analog Impurities CS-O-07295 873950-19-7 In Stock
Atorvastatin Ethyl Ester Impurity Impurities CS-O-07278 1146977-93-6 In Stock
Atorvastatin Impurity 1 Impurities CS-O-14671 Not Available Enquire
Atorvastatin Impurity 16 Impurities CS-P-07060 1450739-65-7 Enquire
Atorvastatin Impurity 17 Impurities CS-EO-01526 666714-64-3 In Stock
Atorvastatin Impurity 19 Impurities CS-P-07062 196085-84-4 Enquire
Atorvastatin Impurity 20 Impurities CS-P-06984 1016893-70-1 Enquire
Atorvastatin Impurity 21 Impurities CS-P-07063 1357600-18-0 Enquire
Atorvastatin Impurity 40 Impurities CS-O-54388 1198087-00-1 Enquire
Atorvastatin Impurity D Impurities CS-O-14632 148146-51-4 In Stock
Atorvastatin Impurity D ( Mixture of compounds ) Impurities CS-O-49586 Not Available Enquire
Atorvastatin Impurity F Impurities CS-O-14630 887196-24-9 In Stock
Atorvastatin Isopropyl Ester Impurities CS-O-07279 1035205-25-4 Enquire
Atorvastatin Lactam Calcium Salt Impurity Impurities CS-O-16248 148127-11-1 In Stock
Atorvastatin Lactam Impurity calcium salt Impurities CS-O-39694 1046118-41-5 Enquire
Atorvastatin Lactam Phenanthrene Impurities CS-O-15565 148127-12-2 Enquire
Atorvastatin Lactam Sodium Salt Impurity Impurities CS-O-52709 148217-40-7 Enquire
Atorvastatin Lactone 3-O-Methyl Ether Impurities CS-O-15199 Not Available Enquire
Atorvastatin Lactone Diepoxide Impurities CS-O-14628 1046118-40-4 In Stock
Atorvastatin Oxirane Impurity Impurities CS-P-07064 1246818-88-1 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Atorvastatin calcium trihydrate (Y0001327) EP Standards CS-EG-00679 344423-98-9 Enquire
Atorvastatin impurity A (Y0001328) EP Standards CS-EG-00128 Not Available Enquire
Atorvastatin impurity B (Y0001329) EP Standards CS-EG-00129 Not Available Enquire
Atorvastatin impurity C (Y0001330) EP Standards CS-EG-00130 Not Available Enquire
Atorvastatin impurity D (Y0001331) EP Standards CS-EG-00131 148146-51-4 Enquire
Atorvastatin System suitability EP Standards CS-EG-03063 134523-00-5 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(3S,5S)-Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-48405 472967-95-6 Enquire
10-trans-Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-48406 1105067-90-0 Enquire
10-trans-Atorvastatin tert-Butyl Ester Intermediates CS-T-48411 1217751-95-5 Enquire
2-Benzyloxy Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-49019 265989-39-7 Enquire
2-Hydroxy Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-54901 265989-40-0 Enquire
3-ETHYL-5-(2-HYDROXYETHYL)-4-METHYL THIAZOLIUM BROMIDE Intermediates CS-O-10745 54016-70-5 In Stock
4-Benzyloxy Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-49021 163217-68-3 Enquire
4-Hydroxy Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-54903 265989-36-4 Enquire
4-methyl-3-oxo-N-phenyl-2- (phenylmethylene) pentanamide Intermediates CS-O-31957 125971-57-5 In Stock
4-tert-Butyldimethylsilyl Atorvastatin Lactone Intermediates CS-T-50117 842162-99-6 Enquire
Atorvastatin 3-Isopropyl Ether tert-Butyl Ester Intermediates CS-ED-11752 1797009-04-1 Enquire
Atorvastatin Lactam Allyl Ester Intermediates CS-ED-11747 1246812-55-4 Enquire
Atorvastatin Lactam Lactone Intermediates CS-ED-11758 1795791-15-9 Enquire
Atorvastatin Lactam Methyl Ester Intermediates CS-ED-11754 1795790-02-1 Enquire
Atorvastatin Lactam Phenanthrene Methyl Ester (Mixture of Di... Intermediates CS-ED-11756 906552-20-3 Enquire
Defluoro Atorvastatin Acetonide tert-Butyl Ester Intermediates CS-T-74076 1105067-91-1 In Stock
ent-Atorvastatin Intermediates CS-ED-11743 501121-34-2 Enquire
rac-Atorvastatin Calcium Intermediates CS-ED-11761 363599-71-7 Enquire


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Hydroxy Atorvastatin Acyl-β-D-glucuronide Glucuronides CS-O-13499 Not Available Enquire
Atorvastatin acyl-beta-D-Glucuronide Glucuronides CS-T-48404 463962-58-5 In Stock