Description

Ammonium Chromium(III) Sulfate 12-Water is a high-purity inorganic salt, also known as ammonium chrome alum. This compound is valued for its role as a source of trivalent chromium ions and as a mordant in industrial processes, offering consistent performance and reliable quality. It is essential for manufacturers and laboratories in sectors such as textile dyeing, leather tanning, and chemical synthesis.

Application

• Textile Industry: Acts as a key mordant for fixing dyes to fabrics, particularly for wool and silk, improving color fastness.
• Leather Tanning: Used in chrome tanning processes to stabilize and preserve leather, enhancing its durability and water resistance.
• Chemical Synthesis: Serves as a precursor or catalyst in various inorganic and organic synthesis reactions.
• Laboratory Reagent: Employed in analytical chemistry and research as a standard or reagent for chromium-based studies.
• Surface Treatment: Used in certain electroplating and metal finishing baths.
• Education & Research: A common compound for educational demonstrations and material science research.

Basic Information

Product Name	Ammonium Chromium(III) Sulfate 12-Water
CAS No.	10022-47-6
Molecular Formula	NH4Cr(SO4)2 · 12H2O
Molecular Weight	478.33 g/mol
Synonyms	Ammonium Chrome Alum; Ammonium Chromium Alum; Chromium Ammonium Sulfate Dodecahydrate; Ammonium Chromium(III) Alum; Ammonium Chromic Sulfate; Chrome Alum; Alum Ammonium Chromium; Ammonium Chromium(3+) Sulfate Dodecahydrate
EINECS	233-037-4

Quality Control

Our Ammonium Chromium(III) Sulfate 12-Water is produced under strict quality management protocols. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and heavy metal content. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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	Dark violet crystals
Identification (IR)	Conforms
Assay (NH4Cr(SO4)2·12H2O)	≥ 98.0 %
Insoluble Matter	≤ 0.01 %
Chloride (Cl)	≤ 0.001 %
Heavy Metals (as Pb)	≤ 0.001 %

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