Description

L-Cephalexin CAS NO 34632-04-7 is a semi-synthetic, first-generation cephalosporin antibiotic. It is valued for its broad-spectrum bactericidal activity against a wide range of Gram-positive and some Gram-negative bacteria. This active pharmaceutical ingredient (API) is essential for manufacturers in the pharmaceutical industry, primarily for the formulation of oral antibiotic medications used to treat various bacterial infections.

Application

• Pharmaceutical API: Primary use as the active ingredient in the manufacture of oral cephalexin monohydrate capsules, tablets, and suspensions.
• Veterinary Medicine: Formulation of antibiotics for treating bacterial infections in companion animals and livestock.
• Research & Development: Used as a reference standard and intermediate in pharmacological and microbiological research studies.
• Generic Drug Production: A key component for companies producing generic antibiotic formulations for global markets.
• Bulk Pharmaceutical Compound: Supplied to contract manufacturing organizations (CMOs) for finished dosage form production.

Basic Information

Product Name	L-Cephalexin
CAS No.	34632-04-7
Molecular Formula	C16H17N3O4S
Molecular Weight	347.39 g/mol
Synonyms	Cephalexin; Cefalexin; 7-(D-α-Amino-α-phenylacetamido)-3-methyl-3-cephem-4-carboxylic acid; Keflex; Ceporex; Cepol; Ceforal; Cephalexin Anhydrous; Cephalexin USP
EINECS	Contact for details

Quality Control

Our L-Cephalexin is manufactured and tested under a strict quality management system. It is typically produced to meet or exceed relevant pharmacopoeial standards such as USP, EP, and BP. Each batch undergoes comprehensive analytical testing including identification, assay, impurity profiling, and residual solvent analysis. A Certificate of Analysis (COA) documenting all test results is provided with every shipment to ensure full traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). The product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Identification (HPLC)	Conforms
Assay (HPLC)	98.0% - 102.0% (on anhydrous basis)
Water Content (KF)	≤ 6.0%
Related Substances (HPLC)	Meets USP/EP requirements
Residual Solvents (GC)	Meets ICH guidelines
Specific Rotation	+149° to +158°
Heavy Metals	≤ 20 ppm
Sulfated Ash	≤ 0.2%

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