Description

3-Guanidinobenzenesulfonic Acid Methyl Ester is a specialized organic sulfonate ester derivative featuring a guanidino functional group. This compound serves as a valuable chemical intermediate and building block in advanced organic synthesis, particularly for the development of pharmaceuticals and biologically active molecules. It is primarily utilized by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and fine chemical sectors.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel drug candidates, particularly those targeting enzyme inhibition or receptor modulation.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, or plant growth regulators.
• Bioconjugation & Probe Development: The reactive ester and guanidine groups make it suitable for creating chemical probes, affinity labels, or protein modification reagents.
• Material Science Research: Potential monomer or additive in the development of specialty polymers with unique ionic or hydrogen-bonding properties.
• Chemical Biology: Serves as a precursor for compounds used to study biological pathways and protein function.
• Custom Synthesis & Contract Manufacturing: Supplied to CDMOs (Contract Development and Manufacturing Organizations) for client-specific synthetic routes.

Basic Information

Product Name	3-Guanidinobenzenesulfonic Acid Methyl Ester
CAS No.	46426-73-7
Molecular Formula	C8H11N3O3S
Molecular Weight	229.26 g/mol
Synonyms	Methyl 3-Guanidinobenzenesulfonate; Benzenesulfonic acid, 3-guanidino-, methyl ester; 3-(Carbamimidamido)benzenesulfonic acid methyl ester; Methyl 3-guanidinolbenzenesulfonate; 3-Guanidinophenylsulfonic acid methyl ester; Methyl 3-[(diaminomethylidene)amino]benzenesulfonate; 46426-73-7 (CAS)
EINECS	Contact for details

Quality Control

Our production of 3-Guanidinobenzenesulfonic Acid Methyl Ester adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and reliability. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting key specifications such as assay, impurity profile, and physical characteristics. We are committed to meeting the exacting standards required for GMP-related synthesis and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which may affect product stability and performance. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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