Description

Carboxylic Acid tert-Butyl Ester CAS NO 856935-80-3 is a high-purity chemical intermediate characterized by its tert-butyl ester functional group, offering enhanced stability and solubility for advanced synthesis. This compound is critical for researchers and manufacturers requiring a protected carboxylic acid moiety for precise, multi-step organic transformations. It is primarily utilized in the pharmaceutical, agrochemical, and specialty chemical sectors for the development of active ingredients and novel materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for prodrug development and peptide chemistry.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators requiring specific ester functionalities.
• Polymer & Material Science: Serves as a monomer or modifying agent in the creation of specialty polymers with tailored properties.
• Organic Synthesis Reagent: Employed as a protecting group for carboxylic acids in complex multi-step laboratory and industrial syntheses.
• Flavor & Fragrance Industry: Intermediate for the production of certain ester-based aroma compounds.
• Research & Development: Essential tool compound in medicinal chemistry and process development for exploring new chemical entities.

Basic Information

Product Name	Carboxylic Acid tert-Butyl Ester
CAS No.	856935-80-3
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	tert-Butyl carboxylate; Carboxylic Acid t-Butyl Ester; t-Butyl Ester of Carboxylic Acid; Butyl ester, tert-; 2-Methyl-2-propyl carboxylate; (CH3)3COOCR; BOC-protected acid (context-dependent); 856935-80-3
EINECS	Contact for details

Quality Control

Our Carboxylic Acid tert-Butyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatographic purity analysis and identity confirmation, to ensure it meets exacting standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong acids and organic solvents. Recommended storage temperature is between 15°C and 25°C. Keep container tightly sealed when not in use to maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Individual impurity ≤ 0.5% Total impurities ≤ 2.0%

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