Description

Butyryl Chloride CAS NO 141-75-3 is a versatile and highly reactive acid chloride derivative of butyric acid. This compound is a critical intermediate in organic synthesis, valued for its ability to introduce the butyryl group into target molecules efficiently. It is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to produce active ingredients, fragrances, and polymer modifiers.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of various active pharmaceutical ingredients (APIs), including local anesthetics and other therapeutic agents.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators.
• Perfumery and Flavoring Agent: Serves as a precursor for esters used in artificial flavorings and fragrance compositions.
• Polymer and Resin Modification: Acts as an acylating agent to modify the properties of polymers, plastics, and synthetic resins.
• Dye and Pigment Manufacturing: Employed in the synthesis of organic dyes and pigments.
• Chemical Research & Development: A fundamental reagent in organic chemistry labs for acylation reactions and novel compound synthesis.

Basic Information

Product Name	Butyryl Chloride
CAS No.	141-75-3
Molecular Formula	C4H7ClO
Molecular Weight	106.55 g/mol
Synonyms	Butanoyl Chloride; n-Butyryl Chloride; Butyric Acid Chloride; n-Butanoyl Chloride; 1-Propanecarbonyl Chloride; Butyroyl Chloride; Butyryl Chloride; Butyric Chloride
EINECS	205-498-5

Quality Control

Our Butyryl Chloride is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for industrial and fine chemical synthesis. A comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles is provided with each shipment to guarantee consistent quality and traceability.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat, ignition sources, and incompatible materials such as strong bases, alcohols, and oxidizing agents. Due to its hygroscopic and highly volatile nature, containers must be kept tightly sealed under an inert atmosphere (e.g., nitrogen) to maintain product integrity. Recommended storage temperature: 2-8°C.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Water Content (Karl Fischer)	≤ 0.5%
Butyric Acid (Titration)	≤ 1.0%
Density at 20°C	1.025 - 1.035 g/mL
Boiling Point	101 - 102°C

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