Description

4-Nitrobenzenemethanesulfonic Acid Sodium Salt is a versatile organic intermediate and sulfonation reagent with the CAS registry number 36639-50-6. This compound is valued for its role in introducing the sulfonate functional group, which enhances water solubility and modifies chemical reactivity in target molecules. It is primarily sought by R&D chemists and process engineers in the pharmaceutical, agrochemical, and specialty chemical industries for synthesizing dyes, surfactants, and active pharmaceutical ingredients (APIs).

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of sulfonamide-based drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators requiring sulfonate groups.
• Dye and Pigment Manufacturing: Serves as a precursor for azo dyes and other colorants where the sulfonate group improves solubility and fiber affinity.
• Surfactant and Detergent Industry: Acts as an intermediate for anionic surfactants due to its benzenesulfonate structure.
• Chemical Research & Development: Employed as a standard reagent in organic synthesis for sulfonation reactions and structure-activity relationship (SAR) studies.
• Polymer Modification: Used to introduce ionic character or water-solubility into polymers for specialty applications.

Basic Information

Product Name	4-Nitrobenzenemethanesulfonic Acid Sodium Salt
CAS No.	36639-50-6
Molecular Formula	C7H6NNaO5S
Molecular Weight	239.18 g/mol
Synonyms	Sodium 4-Nitrobenzenemethanesulfonate; Sodium (4-Nitrophenyl)methanesulfonate; 4-Nitrobenzylsulfonic Acid Sodium Salt; (4-Nitrophenyl)methanesulfonic Acid Sodium Salt; p-Nitrobenzylsulfonic Acid Sodium Salt; Benzenemethanesulfonic acid, 4-nitro-, sodium salt; NSC 163049
EINECS	Contact for details

Quality Control

Our 4-Nitrobenzenemethanesulfonic Acid Sodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and research use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment and is available 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). This product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals	≤ 20 ppm
Residue on Ignition	≤ 0.1%

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