Description

Pyridine Sulfur Trioxide is a versatile and highly reactive sulfonating and sulfating agent, widely recognized for its role as a key intermediate in organic synthesis. Its primary value lies in its ability to introduce sulfonate groups under mild conditions, making it indispensable for creating complex molecules with precision. This compound is essential for research laboratories and industrial-scale production facilities in the pharmaceutical, agrochemical, and specialty chemical sectors.

Application

• Pharmaceutical Synthesis: A critical reagent for the sulfonation of sensitive intermediates in the production of active pharmaceutical ingredients (APIs) and drug candidates.
• Agrochemical Manufacturing: Used in the synthesis of sulfonated herbicides, pesticides, and plant growth regulators.
• Dye and Pigment Production: Facilitates the introduction of sulfonate groups to enhance the water solubility and dyeing properties of colorants.
• Polymer Modification: Employed to sulfonate polymers, improving characteristics like hydrophilicity, ion-exchange capacity, and biocompatibility.
• Laboratory Research: A valuable tool in academic and R&D settings for studying sulfonation reactions and developing new synthetic methodologies.
• Surfactant and Detergent Intermediates: Serves as a building block in the manufacture of anionic surfactants.

Basic Information

Product Name	Pyridine Sulfur Trioxide
CAS No.	26412-87-3
Molecular Formula	C5H5N·SO3
Molecular Weight	159.16 g/mol
Synonyms	Pyridine-SO3 Complex; Sulfur Trioxide Pyridine Complex; Pyridinium Sulfonate; Pyridine Sulfonate; SO3-Pyridine; Pyridine·SO3; Pyridine Sulfotrioxide; 2-Sulfopyridine
EINECS	247-683-3

Quality Control

Our Pyridine Sulfur Trioxide is manufactured under strict quality management systems. Every batch undergoes comprehensive analytical testing to ensure high purity, consistency, and compliance with relevant industry standards. A detailed Certificate of Analysis (COA), including assay, identification, and impurity profiles, is provided with each shipment to guarantee reliable performance in your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed under an inert atmosphere (e.g., nitrogen or argon) to prevent decomposition. Recommended storage temperature is 2-8°C for long-term stability.

Specification

Item	Specification
Appearance	White to off-white crystalline powder or lumps
Identification (IR)	Conforms to reference spectrum
Assay (Titration)	≥ 95.0%
Water Content (KF)	≤ 1.0%
Pyridine Content (GC)	Balance
Residue on Ignition	≤ 0.1%

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