DL-Lysine Acetylsalicylate – Impurity D (CAS 671-42-1): A Quick Insight

DL-Lysine Acetylsalicylate – Impurity D (CAS 671-42-1):

DL-Lysine Acetylsalicylate – Impurity D is a high-purity chemical standard offered by Pharmaffiliates, catalogued under PA 04 2720040. This compound is chemically identified as (3RS)-3-Aminoazepan-2-one, with a molecular formula of C₆H₁₂N₂O and molecular weight of 128.18 g/mol.

Key Specifications:

  • CAS Number: 671-42-1

  • Chemical Name: (3RS)-3-Aminoazepan-2-one (a chiral lactam)

  • Molecular Formula & Weight: C₆H₁₂N₂O, 128.18 g/mol

  • Chemical Class: Impurity / chiral standard / pharmaceutical reference standard / fine chemical

Storage & Handling:

  • Storage Conditions: Maintain between 2–8 °C in a refrigerator.

  • Shipping Conditions: Ambient temperature is acceptable.

Related Compounds:

Pharmaffiliates offers an extensive suite of related products including other impurities (B, C, E, F, G, H, I, J, K) and the primary API standard, DL-Lysine Acetylsalicylate.

Why DL-Lysine Acetylsalicylate – Impurity D Matters

1. Reference Standard for Quality Control

In the pharmaceutical industry, accurately quantifying and separating impurities is crucial during synthesis, formulation, and regulatory submissions. Impurity standards like Impurity D ensure analytical methods (e.g., HPLC, UPLC, NMR) are precise and validated—a critical step for regulatory approval and product safety.

2. Support for Method Development & Validation

Analytical labs rely on pure impurity standards to develop, validate, and transfer methods across labs or organizations. Using a certified standard such as this one helps maintain consistency and compliance with regulatory norms.

3. Chiral Compound for Advanced Research

As a chiral molecule, (3RS)-3-Aminoazepan-2-one can play a role in stereochemistry studies, impurity profiling, and research into molecule–structure relationships.



Chemical Profile & Broader Context

Impurity D, also known as 3-Amino-azepan-2-one, is catalogued under global substance registration systems. It is also recognized by synonyms such as dl-α-aminocaprolactam and NSC-522223.

In a broader pharmaceutical context, Lysine Acetylsalicylate (the API parent of Impurity D) is a water-soluble aspirin derivative. It’s known for faster onset when administered intravenously and is commonly used for acute pain and rapid antiplatelet effects.

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