Description

p-Toluenesulfonic Acid sec-Butyl Ester is a versatile organic sulfonate ester, widely recognized for its utility as an alkylating agent and a reactive intermediate in fine chemical synthesis. Its value lies in its ability to efficiently transfer the sec-butyl group under controlled conditions, enabling the synthesis of complex molecules. This compound is essential for R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty chemical industries seeking reliable building blocks for advanced manufacturing.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs) and other drug candidates.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and pesticides where the sec-butyl moiety is required.
• Polymer Chemistry: Acts as an initiator or chain transfer agent in controlled polymerization reactions.
• Fine Chemical Manufacturing: Employed as an alkylating agent for the introduction of the sec-butyl group into target molecules in custom synthesis.
• Dye and Pigment Production: Serves as an intermediate in the synthesis of specialized colorants and functional materials.
• Research & Development: A valuable reagent for method development and exploratory organic synthesis in academic and industrial labs.

Basic Information

Product Name	p-Toluenesulfonic Acid sec-Butyl Ester
CAS No.	715-11-7
Molecular Formula	C11H16O3S
Molecular Weight	228.31 g/mol
Synonyms	sec-Butyl p-toluenesulfonate; 4-Methylbenzenesulfonic acid sec-butyl ester; 1-Methylpropyl 4-methylbenzenesulfonate; p-Toluenesulfonic acid 1-methylpropyl ester; Tosic acid sec-butyl ester; sec-Butyl tosylate; 4-Toluenesulfonic acid sec-butyl ester
EINECS	211-929-6

Quality Control

Our p-Toluenesulfonic Acid sec-Butyl Ester is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay and impurity profile analysis by chromatographic methods, to ensure it meets high-purity standards suitable for synthetic applications. Certificates of Analysis (COA) with full batch traceability are provided to guarantee supply reliability and consistent performance for your critical processes.

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 bases. Recommended storage temperature is 2-8°C for long-term stability. The compound is moisture-sensitive; keep container tightly sealed when not in use.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Specific Gravity (20°C)	1.10 - 1.20

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