Description

Ammonium Ferric Sulfate Dodecahydrate is a high-purity inorganic salt widely recognized for its role as a primary standard in analytical chemistry. Its consistent composition and stability make it an essential reagent for precise volumetric analysis and quality control procedures. This product is critical for laboratories, water treatment facilities, and industrial processes requiring reliable and accurate chemical measurements.

Application

• Primary Standard in Titration: Used as a highly accurate standard substance for the standardization of titrants like potassium permanganate and cerium(IV) sulfate in redox titrations.
• Water and Wastewater Treatment: Acts as a coagulant and flocculant aid for the removal of suspended solids and phosphates in industrial and municipal water treatment systems.
• Laboratory Reagent: Serves as a key analytical reagent in quantitative chemical analysis, particularly in oxidation-reduction (redox) reactions.
• Electroplating & Metal Surface Treatment: Employed in electroplating baths and as a mordant in metal finishing and etching processes.
• Pharmaceutical Synthesis: Utilized as a catalyst or reagent in specific synthetic pathways for active pharmaceutical ingredients (APIs).
• Educational & Research: A fundamental compound used in academic and industrial research settings for teaching and developing analytical methodologies.

Basic Information

Product Name	Ammonium Ferric Sulfate Dodecahydrate
CAS No.	7783-83-7
Molecular Formula	NH₄Fe(SO₄)₂·12H₂O
Molecular Weight	482.19 g/mol
Synonyms	Ferric Ammonium Sulfate Dodecahydrate; Ammonium Iron(III) Sulfate Dodecahydrate; Iron Ammonium Sulfate; FAS; Ammonium Ferric Alum; Ammonium Iron Alum; Mohr's Salt (oxidized form); NH₄Fe(SO₄)₂·12H₂O
EINECS	233-382-4

Quality Control

Our Ammonium Ferric Sulfate Dodecahydrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for use as a primary standard and in sensitive industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance.

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 low-humidity environment to prevent caking and maintain chemical integrity.

Specification

Item	Specification
Appearance	Pale violet crystals
Identification (IR)	Conforms
Assay (NH₄Fe(SO₄)₂·12H₂O)	≥ 99.0%
Chloride (Cl)	≤ 0.001%
Nitrate (NO₃)	≤ 0.005%
Substances not precipitated by Ammonia	≤ 0.05%
Copper (Cu)	≤ 0.002%
Zinc (Zn)	≤ 0.003%

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