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

Tamoxifen Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(E)-3-Hydroxy Tamoxifen-d5 Stable Isotopes CS-T-96800 1185245-32-2 Enquire
(E)-4-Hydroxy Tamoxifen-d5 (Contains up to 10% Z isomer) Stable Isotopes CS-T-96799 Not Available Enquire
(E)-Tamoxifen-13C2, 15N Stable Isotopes CS-T-99824 Not Available Enquire
(E/Z)-N,N-Didesmethyl-4-hydroxy Tamoxifen-d5 Stable Isotopes CS-T-100470 Not Available Enquire
(E/Z)-Tamoxifen-d5 Stable Isotopes CS-T-99825 Not Available Enquire
4’-Hydroxy Tamoxifen-d6 (contains up to 10% E isomer) Stable Isotopes CS-T-101254 1346606-80-1 Enquire
N-Demethyl-3,4-dihydroxytamoxifen-d3 Hydrochloride (Z,E mixt... Stable Isotopes CS-T-99016 Not Available Enquire
N-Demethyl-3-methoxy-4-hydroxytamoxifen-d3 Hydrochloride (Z... Stable Isotopes CS-T-99015 Not Available Enquire
N-Desmethyl N-Nitroso Tamoxifen-d3 Stable Isotopes CS-O-44821 Not Available In Stock
N-Desmethyl-4’-hydroxy Tamoxifen-d3 (E/Z Mixture) Stable Isotopes CS-T-101575 1795139-22-8 Enquire
N-Desmethyl-4-hydroxy Tamoxifen-d5 (1:1 E/Z Mixture) Stable Isotopes CS-T-88732 1584173-54-5 Enquire
N-Desmethyl-4-hydroxy Tamoxifen-d5 Tri-O-acetyl-β-D-glucuron... Stable Isotopes CS-T-98476 Not Available Enquire
N-Desmethyl-4-hydroxy Tamoxifen-d5 β-D-Glucuronide (E/Z Mixt... Stable Isotopes CS-T-98477 Not Available Enquire
Tamoxifen-d3 Stable Isotopes CS-O-10457 508201-30-7 In Stock
(E,Z)-Tamoxifen-d5 N-β-D-Glucuronide (~90%) Stable Isotopes CS-T-95329 Not Available Enquire
(E/Z)-4,4'-Dihydroxy-N-desmethyl Tamoxifen-d3 Stable Isotopes CS-T-53203 1246832-93-8 Enquire
(Z)-4-Hydroxy Tamoxifen-d5 Stable Isotopes CS-T-28766 164365-20-2 Enquire
N-Desmethyl Tamoxifen-d5 Stable Isotopes CS-ZH-09835 164365-16-6 Enquire
Tamoxifen 13C6 Stable Isotopes CS-EK-01223 10540-29-1 unlabeled Enquire
Tamoxifen-13C6 Stable Isotopes CS-T-86363 1346606-38-9 Enquire
Tamoxifen-D5 Stable Isotopes CS-O-11795 157698-32-3 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Tamoxifen API CS-T-43118 10540-29-1 In Stock
Tamoxifen citrate API CS-O-31029 54965-24-1 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-Hydroxy-tamoxifen Metabolite CS-EK-02307 68392-35-8 In Stock
(E/Z)-N,N-Didesmethyl-4-hydroxy Tamoxifen Metabolite CS-T-92059 1217237-98-3 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(Z)-1-[4-(2-Chloroethoxyphenyl]-1,2-diphenyl-1-butene Impurity CS-T-71746 97818-83-2 In Stock
(Z)-4-Hydroxy-N-Desmethyl Tamoxifen Impurity CS-T-27133 112093-28-4 Enquire
E)-4-Hydroxytamoxifen Impurity CS-O-55639 174592-47-3 Enquire
Endoxifen E-isomer Hydrochloride Impurity CS-O-60285 1197194-61-8 Enquire
N-DesmethylTamoxifen (E/Z mixture) Impurity CS-P-09209 1431858-27-3 In Stock
Tamoxifen Citrate Impurity CS-O-36313 7244-96-4 In Stock
Tamoxifen Dimer Impurity CS-T-43127 1346606-51-6 In Stock
Tamoxifen EP Impurity A (HCl salt) Impurity CS-EO-03874 66584-36-9 Enquire
Tamoxifen EP Impurity C Citrate Impurity CS-EO-03877 20171-74-8 Enquire
Tamoxifen EP Impurity E 2-hydroxypropane-1,2,3-tricarboxylic... Impurity CS-EO-03875 2734357-02-7 (Freebase) Enquire
Tamoxifen mixture of EZ isomers HCl Impurity CS-EO-03876 96762-97-9 Enquire
α-Hydroxytamoxifen Impurity CS-O-55640 97151-02-05 Enquire
(E)-4-Acetoxy Tamoxifen Impurity CS-T-64601 76117-70-9 Enquire
(E)-N,N-Didesmethyl-4-hydroxy Tamoxifen Impurity CS-T-91136 1394929-55-5 Enquire
(E/Z)-4,4’-Dihydroxy-N-desmethyl Tamoxifen Impurity CS-T-91659 1217247-19-2 Enquire
(E/Z)-N,N-Didesmethyl-4-hydroxy Tamoxifen 2’-Azide Impurity CS-T-90277 1331643-32-3 Enquire
(Z)-4-Hydroxy Tamoxifen Impurity CS-T-28760 68047-06-3 Enquire
N,N-Didesmethyl Tamoxifen Impurity CS-T-89909 80234-20-4 Enquire
N-Boc-N-desmethyl-4-hydroxy Tamoxifen (E/Z Mixture) Impurity CS-T-68366 1189368-74-8 Enquire
N-Desmethyl (E)-a-Hydroxy Tamoxifen Impurity CS-T-88980 162070-61-3 Enquire
N-Desmethyl Tamoxifen Hydrochloride Impurity CS-T-88640 15917-65-4 Enquire
N-Desmethyl-4’-hydroxy Tamoxifen Impurity CS-T-88950 170171-12-7 Enquire
N-Methyl-N-(2-acetoxyacetyl) Tamoxifen (E/Z Mixture) Impurity CS-T-82013 1076198-47-4 Enquire
N-Methyl-N-(2-hydroxyethyl)tamoxifen Impurity CS-T-80143 77214-91-6 Enquire
tamoxifen citrate impurity B Impurity CS-O-16930 748-97-0 Enquire
Tamoxifen citrate impurity C Impurity CS-O-16931 19957-51-8 Enquire
Tamoxifen citrate impurity D Impurity CS-O-16932 15917-50-7 Enquire
Tamoxifen citrate impurity F Impurity CS-O-16933 31750-48-8 Enquire
Tamoxifen citrate impurity H Impurity CS-O-16934 809285-09-4 Enquire
Tamoxifen Impurity E Impurity CS-EO-00149 2734357-02-7 Enquire
Tamoxifen Impurity G Impurity CS-P-02144 68047-07-4 Enquire
Tamoxifen N-Oxide Impurity CS-T-86360 75504-34-6 Enquire


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Desmethyl-3-hydroxy Tamoxifen O-β-D-Glucuronide Glucuronide CS-T-88201 206440-83-7 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Desmethyl Tamoxifen (Mixture of Isomers) Nitrosamine CS-O-45155 Not Available In Stock


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Tamoxifen Citrate Secondary Standards CS-SS-25500-300MG 54965-24-1 Enquire


Pharmaceutical Stds.

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-[4-(1,2-Diphenyl-1-propenyl)phenoxy]-N,N-dimethylethanamin... Pharmaceutical Stds. CS-TB-35133 197251-11-9 Enquire


Analytical Standard

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Desmethyl Tamoxifen (Mixture of Isomers) Analytical Standard CS-O-45155-10MG ---- Enquire
N-nitroso-desmethyl-tamoxifen-100 PPM in Acetonitrile Analytical Standard CS-O-45155-1.5ML ---- Enquire


Carbohydrates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(E)-N-desmethyltamoxifen-4-O-glucuronide Carbohydrates CS-O-55644 152764-52-8 Enquire
(Z)-N-desmethyltamoxifed-4-O-glucuronide Carbohydrates CS-O-55641 2102025-90-9 Enquire


Chiral

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(E)-Tamoxifen Chiral CS-T-43122 13002-65-8 In Stock
(E-Z)-Tamoxifen Chiral CS-T-61374 7728-73-6 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Tamoxifen citrate for performance test EP Standards CS-BX-030818 54965-24-1 Enquire