Description

Isopropyl 4-(3,5-Ditert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydro-5-Pyrimidinecarboxylate is a high-performance hindered phenol antioxidant designed to protect polymers and other materials from oxidative degradation. This compound matters for its ability to extend the service life and maintain the physical properties of sensitive formulations under demanding conditions. It is primarily needed by manufacturers in the polymer, plastics, and specialty chemical industries seeking reliable stabilization for their products.

Application

• Primary antioxidant and stabilizer in polyolefins (PP, PE) and engineering plastics.
• Additive in synthetic lubricants, greases, and transformer oils to inhibit oxidation.
• Stabilizing component in adhesive and sealant formulations to prevent premature aging.
• Protective agent in elastomers and rubber compounds to maintain elasticity.
• Intermediate in the synthesis of more complex, high-molecular-weight antioxidants.
• Stabilizer for petroleum-derived products and fuels.
• Additive in coatings and paints to protect against UV and thermal oxidative damage.

Basic Information

Product Name	Isopropyl 4-(3,5-Ditert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydro-5-Pyrimidinecarboxylate
CAS No.	488090-08-0
Molecular Formula	C23H34N2O4
Molecular Weight	402.53 g/mol
Synonyms	Isopropyl 4-(3,5-di-tert-butyl-4-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate; 5-Pyrimidinecarboxylic acid, 1,2,3,4-tetrahydro-4-(3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)-6-methyl-2-oxo-, 1-methylethyl ester; Antioxidant 488090-08-0; Phenolic pyrimidinone antioxidant; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our production of Isopropyl 4-(3,5-Ditert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydro-5-Pyrimidinecarboxylate adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is easily oxidized and should be kept under an inert atmosphere (e.g., nitrogen) for long-term storage to preserve efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 10 ppm

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