Description

Sulfur Trioxide is a highly reactive and versatile chemical intermediate essential for industrial sulfonation and sulfation reactions. Its primary value lies in its powerful electrophilic properties, enabling the efficient production of surfactants, dyes, and pharmaceuticals. This compound is a critical raw material for manufacturers in the detergent, chemical synthesis, and agrochemical industries seeking to introduce sulfonic acid groups into organic molecules. Sulfur Trioxide CAS NO 14265-45-3 is typically handled as a stabilized liquid or gas to ensure safe and controlled reactivity.

Application

• Surfactant Manufacturing: Key reagent for the sulfonation of linear alkylbenzene (LAB) to produce linear alkylbenzene sulfonate (LAS), a major component in household and industrial detergents.
• Dye and Pigment Production: Used in the sulfonation of aromatic compounds to create water-soluble intermediates for dyes and organic pigments.
• Pharmaceutical Synthesis: Employed as a sulfating agent in the production of certain heparin derivatives and other active pharmaceutical ingredients (APIs).
• Agrochemical Formulations: Intermediate in the synthesis of sulfonated herbicides and pesticides to enhance solubility and efficacy.
• Chemical Intermediate: Serves in the manufacture of sulfonic acids, sulfates, and other specialty chemicals used across multiple industrial sectors.
• Catalyst and Reagent: Acts as a potent Lewis acid catalyst in various organic synthesis and polymerization processes.

Basic Information

Item	Detail
Product Name	Sulfur Trioxide
CAS No.	14265-45-3
Molecular Formula	SO3
Molecular Weight	80.06 g/mol
Synonyms	Sulfuric anhydride; Sulfur(VI) oxide; SO3; Sulfuric oxide; Sticky sulfur trioxide; γ-sulfur trioxide; Sulfur trioxide, stabilized
EINECS	238-122-7

Quality Control

Our Sulfur Trioxide is produced and handled under stringent quality management protocols to ensure batch-to-batch consistency and reliability for industrial processes. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as assay, purity, and stabilizer content. Our quality systems are designed to meet the rigorous demands of global chemical manufacturing, ensuring the material's performance in critical sulfonation reactions.

Storage

Preserve in a tightly closed, properly rated pressure vessel or container, protected from moisture and heat. Store in a cool, well-ventilated, dedicated area away from incompatible materials such as water, organic compounds, and strong bases. Due to its highly volatile and hygroscopic nature, storage areas must be dry and equipped with appropriate safety measures. Containers must be kept sealed under a dry, inert atmosphere when not in use to prevent polymerization and ensure stability.

Specification

Item	Specification
Appearance	Colorless to slightly yellow liquid or solid
Assay (SO3)	Min. 99.5%
Stabilizer Content	As specified (e.g., Boric acid, Dioxane)
Iron (Fe)	Max. 10 ppm
Heavy Metals (as Pb)	Max. 5 ppm
Water Content	Max. 0.05%

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