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

Allopurinol Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
[13C4]-Allopurinol Stable Isotopes CS-EK-02123 315-30-0 unlabeled Enquire
Allopurinol 13C4 Stable Isotopes CS-O-15455 315-30-0(Unlabeled) Enquire
Allopurinol-13C Stable Isotopes CS-O-03343 315-30-0 (Unlabeled) In Stock
Allopurinol-13C,15N2, D2 Stable Isotopes CS-EO-02398 2465-59-0 unlabelled Enquire
Allopurinol-d2 Stable Isotopes CS-O-03126 916979-34-5 In Stock


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Allopurinol API Standards CS-O-07146 315-30-0 In Stock
Oxypurinol API Standards CS-O-02049 2465-59-0 In Stock


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(Z)-2-cyano-3-morpholinoacrylamide Impurities CS-O-46766 Not Available Enquire
2-Cyano-3-morpholinoacrylamide Impurities CS-O-47831 25229-97-4 Enquire
3-Aminopyrazole-4-carboxamide Hemisulfate Impurities CS-O-07140 27511-79-1 In Stock
7N-[1-(2-Carboxy)ethyl]allopurinol Impurities CS-T-50319 34397-00-7 Enquire
Allopurinol EP Impurity B Impurities CS-O-07141 22407-20-1 In Stock
Allopurinol EP Impurity B -Formate salt Impurities CS-O-40326 22407-20-1 (Free base) Enquire
Allopurinol EP Impurity C Impurities CS-O-07142 1346604-13-4 In Stock
Allopurinol EP Impurity D Impurities CS-O-07143 6994-25-8 In Stock
Allopurinol EP Impurity E Impurities CS-O-07144 31055-19-3 In Stock
Allopurinol EP Impurity H Impurities CS-T-102285 321571-07-7 Enquire
Allopurinol Nitrile Hydrochloride Impurity Impurities CS-EO-03302 478081-97-9 Enquire
Allopurinol Nitrile Impurity Impurities CS-O-07145 16617-46-2 In Stock
Allopurinol Related compound F Impurities CS-T-13617 321571-07-7 In Stock


EP Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Allopurinol (A0350000) EP Standards CS-EG-00526 315-30-0 Enquire
ALLOPURINOL IMPURITY A (A0350010) EP Standards CS-EG-03066 27511-79-1 Enquire
Allopurinol impurity B (A0350020) EP Standards CS-EG-00058 22407-20-1 Enquire
Allopurinol impurity C (A0350030) EP Standards CS-EG-00059 1346604-13-4 Enquire
Allopurinol impurity D (A0350040) EP Standards CS-EG-00060 6994-25-8 Enquire
Allopurinol impurity E (A0350050) EP Standards CS-EG-00061 31055-19-3 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Allopurinol riboside Intermediates CS-T-65189 16220-07-8 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Hydrazine Hydrate Fine Chemicals CS-DB-00093 10217-52-4 In Stock