Description

2,3,3-Trimethyl-3H-Indole-5-Sulfonic Acid is a key sulfonated indole derivative, serving as a critical intermediate in the synthesis of advanced functional molecules. Its value lies in its unique molecular structure, which combines a reactive sulfonic acid group with a substituted indole core, enabling precise chemical modifications. This compound is essential for manufacturers and R&D teams in the pharmaceutical, dye, and specialty chemical sectors seeking to develop novel compounds with specific properties.

Application

• Pharmaceutical Intermediate: A crucial building block for the synthesis of active pharmaceutical ingredients (APIs), particularly in the development of dyes for diagnostic imaging and other specialized drug candidates.
• Dye and Pigment Synthesis: Used in the production of sulfonated indole-based dyes, which offer excellent water solubility and color fastness for textiles, inks, and biological staining.
• Functional Material Precursor: Serves as a starting material for creating advanced organic materials, including liquid crystals, organic semiconductors, and photoactive compounds.
• Biochemical Research: Employed as a reagent or probe in biochemical research due to its fluorescent indole backbone and reactive acid site.
• Chemical Synthesis: Acts as a versatile intermediate in organic synthesis for introducing the trimethylindole-sulfonate moiety into more complex molecular architectures.

Basic Information

Product Name	2,3,3-Trimethyl-3H-Indole-5-Sulfonic Acid
CAS No.	132557-72-3
Molecular Formula	C11H13NO3S
Molecular Weight	239.29 g/mol
Synonyms	5-Sulfo-2,3,3-trimethyl-3H-indole; 2,3,3-Trimethyl-5-sulfoindolenine; 3H-Indole-5-sulfonic acid, 2,3,3-trimethyl-; Trimethylindoleninesulfonic acid; 5-Indolesulfonic acid, 2,3,3-trimethyl-; 2,3,3-Trimethylindolenine-5-sulfonic acid; TMI-5-Sulfonic Acid
EINECS	Contact for details

Quality Control

Our 2,3,3-Trimethyl-3H-Indole-5-Sulfonic Acid is produced under stringent quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for research and industrial synthesis. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available for every shipment upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept sealed to prevent absorption of atmospheric moisture. Keep away from strong bases and incompatible materials.

Specification

Item	Specification
Appearance	Off-white to light yellow powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals	≤ 20 ppm

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