Description

Basic Chromic Sulfate is an inorganic chromium salt with the CAS number 39380-78-4, widely utilized as a key intermediate and tanning agent. This compound is valued for its ability to provide excellent hydrothermal stability and a soft, full grain in leather processing. It serves as a critical raw material for tanneries and chemical manufacturers producing catalysts, pigments, and other chromium-based specialty chemicals.

Application

• Leather Tanning: Primary application as a chrome tanning agent to produce high-quality, stable leather with superior dyeing properties.
• Catalyst Production: Used as a precursor in the synthesis of catalysts for various organic synthesis and polymerization reactions.
• Pigment Manufacturing: Serves as a starting material for the production of green chromium oxide pigments and other colorants.
• Wood Preservation: Employed in formulations for wood treatment chemicals to impart decay and insect resistance.
• Textile Mordant: Acts as a mordant to fix dyes onto textile fibers, improving color fastness.
• Ceramic Glazes: A component in ceramic frits and glazes to achieve specific green colorations and finishes.
• Corrosion Inhibition: Incorporated into surface treatment formulations for metals.
• Research & Development: Used in laboratories for chemical synthesis and as a standard in analytical chemistry.

Basic Information

Product Name	Basic Chromic Sulfate
CAS No.	39380-78-4
Molecular Formula	Cr(OH)SO₄ • xH₂O (Variable hydration)
Molecular Weight	Variable (Contact for details)
Synonyms	Chromic Sulfate Basic; Chromium(III) Hydroxide Sulfate; Basic Chromium Sulfate; Chrome Tanning Salt; Chromium Sulfate Hydroxide; Tanners' Chrome; BCS
EINECS	Contact for details

Quality Control

Our Basic Chromic Sulfate is manufactured under a strict quality management system. Each batch undergoes rigorous testing for key parameters including chromium oxide (Cr₂O₃) content, basicity, and impurity levels to ensure consistency and performance for industrial applications. Certificates of Analysis (COA) are available upon request to support your quality assurance protocols.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent caking and degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Green powder or granules
Identification (IR)	Conforms
Assay (as Cr₂O₃)	24.0 - 26.0 %
Basicity	33 - 42 %
Iron (Fe)	≤ 0.1 %
Insolubles in Water	≤ 0.1 %
pH (10% Solution)	2.5 - 3.5

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