Description

Ammonium Hydrogen Oxalate Hemihydrate is a specialized ammonium salt of oxalic acid, offering a unique combination of acidity and complexing properties. This compound is valued for its precise chemical behavior in analytical and synthesis applications where controlled pH and metal ion chelation are critical. It serves as a key reagent for laboratories and industrial processes in the chemical manufacturing, metallurgy, and analytical sectors.

Application

• Analytical Chemistry: Used as a primary standard or buffer component in titrations and complexometric analyses.
• Metal Surface Treatment: Acts as a cleaning and polishing agent for metal surfaces and in electroplating baths.
• Textile & Leather Processing: Serves as a mordant or bleaching assistant in dyeing and finishing processes.
• Chemical Synthesis: Employed as a precursor or catalyst in organic synthesis and the production of other oxalate salts.
• Laboratory Reagent: A standard chemical for calibration, research, and development in academic and industrial labs.
• Pharmaceutical Intermediates: Used in the synthesis of certain active pharmaceutical ingredients (APIs).

Basic Information

Product Name	Ammonium Hydrogen Oxalate Hemihydrate
CAS No.	37541-72-3
Molecular Formula	C2H7NO5 • 0.5H2O
Molecular Weight	142.10 g/mol (hemihydrate)
Synonyms	Ammonium binoxalate hemihydrate; Acid ammonium oxalate hemihydrate; Ammonium hydrogen oxalate 0.5-hydrate; Oxalic acid, monoammonium salt, hemihydrate; Monoammonium oxalate hemihydrate; Ammonium oxalate monobasic hemihydrate; AHO
EINECS	Contact for details

Quality Control

Our Ammonium Hydrogen Oxalate Hemihydrate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide Certificates of Analysis (COA) with key parameters including assay, loss on drying, and residue on ignition to meet the rigorous standards required for industrial and laboratory use.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Loss on Drying	≤ 2.0 %
Water (Karl Fischer)	4.5 - 6.5 %
Residue on Ignition	≤ 0.1 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.02 %

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