Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

Chromium Sulfate Complex Component – Leather and Related Product Manufacturing

Q: What is the role of chromium sulfate complex in leather production?

It serves as the primary tanning agent that cross-links collagen fibers, making leather more durable, heat-resistant, and less susceptible to biodegradation.

Q: How is chromium sulfate complex typically manufactured?

It's produced by reducing sodium dichromate with reducing agents like sulfur dioxide or glucose in sulfuric acid, followed by concentration and drying.

Component Specifications

Definition

Chromium sulfate complex is a coordination compound formed by chromium(III) ions with sulfate ligands, typically prepared by reducing sodium dichromate with sulfur dioxide or glucose in sulfuric acid. It serves as the primary tanning agent in chrome tanning processes, where it cross-links collagen fibers in animal hides to produce durable, heat-resistant leather with a characteristic blue-green color.

Working Principle

The chromium(III) ions in the complex form coordinate covalent bonds with carboxyl groups on collagen polypeptide chains, creating stable cross-links between protein fibers. This increases the hydrothermal stability, reduces biodegradability, and enhances mechanical properties of the leather.

Materials

Chromium(III) sulfate hydrate [Cr2(SO4)3·xH2O] with basicity typically 33-42%, containing 24-26% Cr2O3 equivalent. May contain masking agents like formate or acetate to control reactivity.

Technical Parameters

Basicity 33-42%
Appearance Dark green powder or granules
Solubility Fully soluble in water
Cr2O3 content 24-26%
pH (10% solution) 2.5-3.5

Standards

ISO 5398, DIN 53308

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Chromium Sulfate Complex.

Parent Products

This component is used in the following industrial products

Chrome Tanning Agent Solution

Industrial chromium-based chemical solution for leather tanning

View Product Details

Engineering Analysis

Risks & Mitigation

Hexavalent chromium formation under certain conditions
Environmental contamination from chromium discharge
Worker exposure to chromium dust

FMEA Triads

Trigger: Improper pH control during tanning
Failure: Incomplete penetration and uneven tanning
Mitigation: Maintain pH 2.8-3.2 during chrome tanning process

Trigger: Oxidation of chromium(III) to chromium(VI)
Failure: Toxic hexavalent chromium formation
Mitigation: Use reducing agents and avoid alkaline conditions

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Chromium(VI) content < 3 mg/kg in final leather per REACH regulations

Test Method

ISO 17075 for chromium(VI) determination in leather

Buyer Feedback

★★★★☆ 4.6 / 5.0 (39 reviews)

"The Chromium Sulfate Complex we sourced perfectly fits our Leather and Related Product Manufacturing production line requirements."

"Found 13+ suppliers for Chromium Sulfate Complex on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Chromium Sulfate Complex is very thorough, especially regarding technical reliability."

Related Components

Dust Protection Enclosure

Dust protection enclosure for leather surface defect detection systems prevents contamination and ensures accurate optical inspection.

Measurement Probe

Precision sensor for measuring moisture content in leather materials during industrial processing.

Pattern Template Library

Digital library storing embossing patterns for leather grain replication systems

Heavy-Duty Needle Bar

A heavy-duty needle bar for industrial leather stitching machines, designed to withstand high tension and repetitive motion in demanding leatherworking applications.

Frequently Asked Questions

What is the role of chromium sulfate complex in leather production?