Description

1,3-Butanesultone is a versatile organosulfur compound, specifically a cyclic sulfonate ester, widely used as a key sulfonation and alkylation agent in organic synthesis. Its primary value lies in its ability to introduce the sulfobutyl group, a crucial moiety for modifying the solubility and ionic properties of target molecules. This makes it an essential intermediate for manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries seeking to develop advanced materials and active ingredients.

Application

• Pharmaceutical Intermediates: Key building block for synthesizing sulfobutyl ether derivatives, particularly in the production of solubilizing agents for poorly soluble drugs (e.g., in sulfobutylether-β-cyclodextrin).
• Agrochemical Synthesis: Used to create sulfonated active ingredients and surfactants that enhance the efficacy and environmental profile of herbicides and fungicides.
• Polymer Modification: Employed to introduce anionic sulfonate groups into polymers, improving hydrophilicity, dyeability, and antistatic properties for fibers and membranes.
• Surfactant & Detergent Industry: Serves as a precursor for specialized anionic surfactants and betaines with unique foaming and emulsifying characteristics.
• Electrolyte Additives: Investigated for use in lithium-ion battery electrolytes to improve stability and cycle life by forming protective solid-electrolyte interphase (SEI) layers.
• Chemical Research & Development: A valuable reagent in organic chemistry for the controlled introduction of sulfonic acid functionalities under mild conditions.

Basic Information

Product Name	1,3-Butanesultone
CAS No.	3289-23-4
Molecular Formula	C4H8O3S
Molecular Weight	136.17 g/mol
Synonyms	1,3-Butanesultone; 1,2-Oxathiolane 2,2-dioxide, 4-methyl-; 4-Methyl-1,2-oxathiolane 2,2-dioxide; 3-Hydroxy-1-propanesulfonic acid sulfone; 1,3-Butyl sultone; 3-Hydroxypropane-1-sulfonic acid γ-sultone; γ-Butyrosultone; NSC 9375
EINECS	221-946-7

Quality Control

Our 1,3-Butanesultone is produced under stringent quality management systems. Every batch undergoes comprehensive analytical testing to ensure high purity and consistency, meeting the exacting requirements of our global B2B clients. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key parameters such as assay, identity, and impurity profiles. We support compliance with relevant regulatory frameworks, including REACH.

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 product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under an inert atmosphere (e.g., nitrogen) to prevent moisture absorption and degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC or HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Related Substances (GC/HPLC)	Individual impurity ≤ 1.0%
Total Impurities	≤ 2.0%

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