Description

Triphenyl-(4-Sulfo-Butyl)-Phosphonium Inner Salt is a specialized organophosphorus compound featuring a zwitterionic structure that combines a lipophilic triphenylphosphonium cation with a hydrophilic sulfonate anion. This unique molecular architecture makes it a highly effective phase-transfer catalyst and a versatile intermediate for synthesizing advanced materials. It is particularly valuable for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty polymer industries who require precise control over reaction kinetics and product purity. Its inner salt form offers advantages in solubility and handling for specific synthetic applications.

Application

• Phase-Transfer Catalyst (PTC): Facilitates reactions between reagents in immiscible phases, crucial for alkylation, esterification, and polymerization processes.
• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and drug candidates, particularly where quaternary phosphonium moieties are required.
• Polymer Chemistry: Serves as a monomer or additive for creating functional polymers with specific ionic or surfactant properties.
• Agrochemical Synthesis: Acts as a key building block in the production of certain herbicides, fungicides, and plant growth regulators.
• Material Science: Employed in the development of ionic liquids, conductive polymers, and other advanced materials.
• Organic Synthesis Reagent: Utilized in various name reactions and as a precursor for other functionalized phosphonium salts.

Basic Information

Product Name	Triphenyl-(4-Sulfo-Butyl)-Phosphonium Inner Salt
CAS No.	164982-05-2
Molecular Formula	C22H23O3PS
Molecular Weight	398.45 g/mol
Synonyms	(4-Sulfobutyl)triphenylphosphonium inner salt; Triphenyl(4-sulfobutyl)phosphonium betaine; 1-Butanesulfonic acid, 4-(triphenylphosphonio)-, inner salt; 4-(Triphenylphosphonio)butane-1-sulfonate; P,P,P-Triphenyl-4-sulfobutylphosphonium hydroxide inner salt; Sulfobutyltriphenylphosphonium inner salt; TPP-SB; [4-(Triphenylphosphonio)butyl]sulfonate
EINECS	Contact for details

Quality Control

Our Triphenyl-(4-Sulfo-Butyl)-Phosphonium Inner Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure high purity and consistency, meeting the stringent requirements for research and industrial synthesis. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with each shipment and are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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