Description

Ammonium Iron(III) Sulfate, also known as ferric ammonium sulfate, is a high-purity inorganic salt essential for analytical chemistry and water treatment processes. Its primary value lies in its role as a reliable and stable source of ferric ions for precise quantitative analysis and coagulation. This compound is a critical reagent for laboratories in the environmental, pharmaceutical, and industrial sectors requiring accurate titrations and standard solutions.

Application

• Primary Standard in Analytical Chemistry: Used as a standard reagent in redox titrations, particularly for the determination of chemical oxygen demand (COD).
• Water and Wastewater Treatment: Acts as a coagulant and flocculant for the removal of suspended solids, phosphates, and organic color from industrial and municipal water.
• Laboratory Reagent: Serves as a key ingredient in the preparation of iron standard solutions for calibration and quality control testing.
• Electronics Industry: Utilized in the production and surface treatment of electronic components and circuit boards.
• Dyeing and Textile Auxiliary: Functions as a mordant in dyeing processes to fix colors onto fabrics.
• Educational and Research Use: Employed in academic and industrial research laboratories for experiments in inorganic and analytical chemistry.

Basic Information

Product Name	Ammonium Iron(III) Sulfate
CAS No.	10138-04-2
Molecular Formula	NH4Fe(SO4)2·12H2O
Molecular Weight	482.19 g/mol
Synonyms	Ferric Ammonium Sulfate; Ammonium Ferric Sulfate Dodecahydrate; Iron Ammonium Sulfate; Ammonium Iron Alum; FAS; Ammonium Iron(III) Alum; Ammonium Ferric Alum; NH4Fe(SO4)2·12H2O
EINECS	233-382-4

Quality Control

Our Ammonium Iron(III) Sulfate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for analytical and industrial applications. A comprehensive Certificate of Analysis (COA) detailing assay, purity, and impurity profiles is provided with every shipment to guarantee traceability and consistency.

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) and must be kept in a dry environment to prevent caking and degradation.

Specification

Item	Specification
Appearance	Pale violet crystals
Identification (IR)	Conforms
Assay (NH4Fe(SO4)2·12H2O)	≥ 99.0%
Chloride (Cl)	≤ 0.001%
Nitrate (NO3)	≤ 0.01%
Substances not precipitated by ammonia	≤ 0.1%
Manganese (Mn)	≤ 0.005%

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