Description

Phenylbutazone CAS NO 50-33-9 is a non-steroidal anti-inflammatory drug (NSAID) belonging to the pyrazolidine class. This compound is valued for its potent anti-inflammatory, analgesic, and antipyretic properties, making it a critical intermediate in pharmaceutical synthesis. It is primarily required by manufacturers in the veterinary and human pharmaceutical sectors for the production of therapeutic formulations.

Application

• Pharmaceutical Intermediate: Key starting material for the synthesis of anti-inflammatory and analgesic drugs.
• Veterinary Medicine: Used in the formulation of treatments for musculoskeletal disorders and pain management in large animals, particularly horses.
• Research & Development: Serves as a reference standard and active compound in pharmacological and toxicological studies.
• Analytical Chemistry: Employed as a standard in HPLC and other chromatographic methods for quality control testing.
• Bulk Drug Substance: Supplied to compounding pharmacies and generic drug manufacturers for final dosage form production.

Basic Information

Product Name	Phenylbutazone
CAS No.	50-33-9
Molecular Formula	C19H20N2O2
Molecular Weight	308.38 g/mol
Synonyms	4-Butyl-1,2-diphenyl-3,5-pyrazolidinedione; Butazolidin; Butadion; Diphenylbutazone; Fenilbutazona; 1,2-Diphenyl-4-butyl-3,5-pyrazolidinedione; PBZ; Bute
EINECS	200-029-0

Quality Control

Our Phenylbutazone is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including identification, purity assay, and impurity profiling, to ensure it meets high-grade pharmaceutical standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Keep away from heat and incompatible materials.

Specification

Item	Specification
Appearance	White or almost white crystalline powder
Identification (IR)	Conforms to reference spectrum
Identification (HPLC)	Retention time corresponds to reference standard
Assay (HPLC)	98.0% - 102.0% (on dried basis)
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.0%
Heavy Metals	≤ 20 ppm

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