Description

Methylarsonic Acid CAS NO 124-58-3 is an organoarsenic compound that serves as a key intermediate in the synthesis of various industrial and agricultural chemicals. Its primary commercial value lies in its role as a precursor for herbicides and wood preservatives, where it contributes to effective pest and decay control. This product is essential for manufacturers and formulators in the agrochemical, wood treatment, and specialty chemical research sectors seeking reliable, high-purity raw materials.

Application

• Herbicide Intermediate: A critical precursor in the synthesis of monosodium methanearsonate (MSMA) and disodium methanearsonate (DSMA), used for post-emergent weed control in cotton, turf, and other non-food crops.
• Wood Preservative Formulation: Used in the production of copper-based wood preservatives (e.g., Chromated Copper Arsenate alternatives) to protect against fungal decay and insect damage.
• Research & Development: Serves as a standard and starting material in chemical research for developing new organoarsenic compounds and studying environmental fate.
• Specialty Chemical Synthesis: Employed as a building block for synthesizing other arsenic-containing compounds used in electronics, semiconductors, and glass manufacturing.

Basic Information

Product Name	Methylarsonic Acid
CAS No.	124-58-3
Molecular Formula	CH5AsO3
Molecular Weight	139.97 g/mol
Synonyms	Methanearsonic Acid; MAA; Monomethylarsonic Acid; Arsonic acid, methyl-; Acidum methylarsonicum; Methylarsonic Acid (MAA); 124-58-3; Methylarsonic acid (VAN)
EINECS	204-706-1

Quality Control

Our Methylarsonic Acid is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed to confirm identity, potency, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Recommended storage temperature is 15-25°C. Keep container tightly sealed when not in use to minimize exposure to air.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As) Content	Calculated from assay

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