Description

Ethyl p-Toluenesulfonate is an organic sulfonate ester, a versatile alkylating agent and chemical intermediate. Its primary value lies in its ability to efficiently transfer an ethyl group in synthesis, making it a critical reagent for modifying molecular structures. This compound is essential for manufacturers and R&D laboratories in the pharmaceutical, agrochemical, and specialty chemical sectors seeking reliable and high-purity building blocks.

Application

• Pharmaceutical Intermediate: Key reagent in the synthesis of active pharmaceutical ingredients (APIs), particularly for introducing ethyl groups into target molecules.
• Agrochemical Synthesis: Used in the production of certain herbicides, pesticides, and plant growth regulators where ethylation is a required step.
• Dye and Pigment Manufacturing: Serves as an intermediate in the synthesis of specific dyes and organic pigments.
• Polymer Modification: Employed as a cross-linking agent or catalyst in the production of specialty polymers and resins.
• Organic Synthesis Reagent: A valuable tool in research laboratories for alkylation reactions, protecting group chemistry, and the synthesis of complex organic compounds.
• Chemical Research & Development: Used in process development and scale-up for novel chemical entities across multiple industries.

Basic Information

Product Name	Ethyl p-Toluenesulfonate
CAS No.	80-40-0
Molecular Formula	C9H12O3S
Molecular Weight	200.25 g/mol
Synonyms	Ethyl Tosylate; p-Toluenesulfonic Acid Ethyl Ester; Tosic Acid Ethyl Ester; Ethyl 4-Methylbenzenesulfonate; 4-Methylbenzenesulfonic Acid Ethyl Ester; ETs; Ethyl p-Tosylate; Ethyl Tos
EINECS	201-277-7

Quality Control

Our Ethyl p-Toluenesulfonate is produced under stringent quality management systems. Each batch undergoes comprehensive analytical testing, including assay, purity profiling, and identification, to ensure it meets exacting standards for use in sensitive applications like pharmaceutical synthesis. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is light-sensitive and easily oxidized; prolonged exposure to light or air should be avoided. For long-term storage under optimal conditions, consider an inert atmosphere.

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)	1.160 - 1.180

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