Description

Cef19 CAS NO 157876-41-0 is a high-purity chemical intermediate belonging to the cephalosporin class of compounds. This product is critical for ensuring the quality and efficacy of advanced pharmaceutical syntheses, particularly in the development of next-generation antibiotics. It serves as a key building block for research institutions and manufacturers in the pharmaceutical and fine chemical industries requiring precise molecular control.

Application

• Pharmaceutical Intermediate: Primary use as a crucial building block in the synthesis of advanced cephalosporin-based antibiotic APIs.
• Research & Development: Serves as a reference standard and starting material in medicinal chemistry for novel antibacterial drug discovery.
• Fine Chemical Synthesis: Used in multi-step organic syntheses requiring a specific, high-purity β-lactam scaffold.
• Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for cGMP production of pharmaceutical actives.
• Academic Research: Utilized in university and institutional labs for biochemical and pharmacological studies.

Basic Information

Product Name	Cef19
CAS No.	157876-41-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Cef19; (6R,7R)-7-[[(2Z)-2-(2-Amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-[(E)-1-propen-1-yl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid; Cefixime Impurity; Cefixime Related Compound; Cephalosporin C-19; 5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid Derivative
EINECS	Contact for details

Quality Control

Our Cef19 is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including HPLC, NMR, and mass spectrometry, to confirm identity and meet stringent impurity profile specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in a dry environment. For long-term storage, consider using desiccants or an inert atmosphere to maintain stability.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time matches reference standard
Assay (HPLC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0% Any single unknown impurity ≤ 0.5%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.2%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.