Description

Methyl 4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydropyrimidine-5-Carboxylate is a specialized hindered phenol derivative that functions as a high-performance antioxidant and light stabilizer. Its molecular structure is engineered to effectively inhibit oxidative degradation and scavenge free radicals, thereby extending the service life of sensitive materials. This compound is essential for formulators and manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance the thermal and UV stability of their products.

Application

• Primary antioxidant and stabilizer in polyolefins (PP, PE) and engineering plastics.
• Additive in synthetic lubricants and greases to prevent oxidation and viscosity breakdown.
• Stabilizing component in adhesives, sealants, and elastomers to improve weatherability.
• Intermediate for the synthesis of more complex polymer additives and pharmaceutical agents.
• Protective agent in coatings and paints to mitigate yellowing and embrittlement from UV exposure.
• Used in fuel and oil additive packages to enhance oxidative stability.
• Research and development of novel antioxidant systems in academic and industrial laboratories.

Basic Information

Product Name	Methyl 4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydropyrimidine-5-Carboxylate
CAS No.	313958-91-7
Molecular Formula	C22H32N2O4
Molecular Weight	388.50 g/mol
Synonyms	Methyl 4-(3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)-6-methyl-2-oxo-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate; 5-Carbomethoxy-4-(3,5-di-tert-butyl-4-hydroxyphenyl)-6-methyl-3,4-dihydropyrimidin-2(1H)-one; Antioxidant 3125; Light Stabilizer 3125; CAS 313958-91-7; Tetrahydro-2-oxopyrimidine-5-carboxylate derivative; Hindered Phenol Stabilizer
EINECS	Contact for details

Quality Control

Our production of Methyl 4-(3,5-Di-tert-Butyl-4-Hydroxyphenyl)-6-Methyl-2-Oxo-1,2,3,4-Tetrahydropyrimidine-5-Carboxylate adheres to a stringent quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and R&D use. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its sensitivity to oxidation, it is recommended to store the product under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep away from heat and incompatible materials.

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%
Heavy Metals	≤ 20 ppm

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