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

Aspirin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Acetylsalicylic acid d3 (Aspirin (Acetoxy-d3) Stable Isotopes CS-T-47333 921943-73-9 In Stock
Aspirin-d4 Stable Isotopes CS-O-02745 97781-16-3 In Stock


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aspirin API Standards CS-T-01103 50-78-2 In Stock
Aspirin calcium API Standards CS-ZH-10170 69-46-5 Enquire
NO-Aspirin API Standards CS-T-37358 287118-97-2 Enquire
NO-Aspirin 1 API Standards CS-T-37357 175033-36-0 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aspirin EP Impurity D Impurities CS-O-10918 530-75-6 In Stock
Aspirin Impurity B Impurities CS-O-31086 636-46-4 In Stock
Aspirin Impurity F Impurities CS-O-31087 1466-82-6 In Stock
Salicylic Acid EP Impurity A (Aspirin Impurity-A) Impurities CS-T-42069 99-96-7 In Stock
Salicylic Acid Impurity B Impurities CS-O-10403 636-46-4 In Stock
Salsalate (Aspirin Impurity-E) Impurities CS-T-42088 552-94-3 In Stock


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aspirin dipyridamole Intermediates CS-O-32568 87653-67-6 Enquire
Aspirin sodium Intermediates CS-ED-37810 493-53-8 Enquire


Glucuronides

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aspirin acyl-beta-D-glucuronide Glucuronides CS-O-30505 24719-72-0 In Stock