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

Trimethoprim Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(4-Trideuteromethoxy) Trimethoprim N3-Oxide Stable Isotopes CS-T-102462 27653-67-4(Unlabelled) Enquire
4-Hydroxy Trimethoprim-13C3 Stable Isotopes CS-T-101039 1391053-67-0 Enquire
4-Hydroxy Trimethoprim-d9 Stable Isotopes CS-T-101038 1794752-40-1 Enquire
4-O-Desmethyl 4-O-Ethyl Trimethoprim-D5 Stable Isotopes CS-T-96815 Not Available Enquire
C-α-NAC Trimethoprim-d3 Stable Isotopes CS-T-104085 Not Available Enquire
Trimethoprim-15N3 Stable Isotopes CS-T-100994 Not Available Enquire
Trimethoprim-d9 Stable Isotopes CS-O-02914 1189460-62-5 In Stock
α-Hydroxy Trimethoprim-D3 (Major) Stable Isotopes CS-T-96797 Not Available Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Syringaldehyde API CS-T-87281 134-96-3 In Stock
Trimethoprim API CS-O-02487 738-70-5 In Stock


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Desmethoxy-3-bromo Trimethoprim Impurity CS-T-16091 16285-82-8 Enquire
3-Desmethyl Trimethoprim Impurity CS-T-16505 27653-69-6 Enquire
4-Demethyltrimethoprim Impurity CS-T-15135 21253-58-7 Enquire
4-Hydroxy Trimethoprim Impurity CS-T-28866 112678-48-5 Enquire
5-(3,4,5-Trimethoxybenzyl)pyrimidine-2,4-diol Impurity CS-T-45600 93885-69-9 Enquire
Trimethoprim 1-N-oxide Impurity CS-O-33931 27653-68-5 Enquire
Trimethoprim EP Impurity A Impurity CS-T-35337 213745-86-9 Enquire
Trimethoprim EP Impurity C Impurity CS-T-56515 29606-06-2 Enquire
Trimethoprim EP Impurity D Impurity CS-T-03580 92440-76-1 Enquire
Trimethoprim EP Impurity E Impurity CS-T-03586 60729-91-1 Enquire
Trimethoprim EP Impurity G Impurity CS-T-16503 78025-68-0 Enquire
Trimethoprim EP Impurity I(Mixture of cis/trans Isomers) Impurity CS-T-48268 30078-48-9 In Stock
Trimethoprim Impurity B Impurity CS-P-00200 30806-86-1 Enquire
Trimethoprim Impurity C Impurity CS-P-00198 29606-06-2 Enquire
Trimethoprim Impurity G Impurity CS-P-00199 78025-68-0 Enquire
Trimethoprim Keto Analogue Impurity CS-T-45595 30806-86-1 In Stock
Trimethoprim L-glutamate Impurity CS-O-51158 94232-28-7 Enquire
Trimethoprim N-oxide Impurity CS-O-33930 27653-67-4 Enquire
α-(3,4,5-Trimethoxybenzylidene)-β-methoxypropylnitrile Impurity CS-T-62422 7520-69-6 In Stock


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Trimethoprim lactate Intermediate CS-DK-00035 23256-42-0 In Stock


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Trimethoprim EP Impurity A Nitrosamine CS-EO-02722 Not Available Enquire