Editorial Technical Reference

Chrome Tanning Agent Solution

This page explains how Chrome Tanning Agent Solution is classified within Tanning and Dressing of Leather. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Chrome Tanning Agent Solution is a standardized aqueous solution containing trivalent chromium salts, primarily chromium(III) sulfate, used as the primary tanning agent in modern leather production.

View Full Specifications Explore Manufacturing Sources
Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Chrome Tanning Agent Solution

Definition
Chrome Tanning Agent Solution is a standardized aqueous solution containing trivalent chromium salts, primarily chromium(III) sulfate, used as the primary tanning agent in modern leather production. This chemical converts raw animal hides into stable, durable leather through cross-linking collagen fibers. It provides superior hydrothermal stability, uniform penetration, and consistent quality compared to vegetable tanning methods. The solution is engineered for precise concentration control in industrial tanning drums and automated processing systems. Key parameters include chromium oxide content (25–30%), basicity (33–42%), pH (2.8–3.5), specific gravity (1.20–1.30 g/cm³), viscosity (10–20 cP), iron content (≤0.1 ppm), chrome content (12–15%), sulfate content (≤5%), chloride content (≤0.5%), water insoluble matter (≤0.5%), density (1.20–1.30 kg/L), storage temperature (5–35°C), and shelf life (12 months). These values are reference ranges and must be verified with the manufacturer for specific applications. The solution is intended for use in industrial leather processing facilities. Always confirm model-specific values and standards with the legal manufacturer or supplier.
Working Principle
Trivalent chromium ions form coordinate covalent bonds with collagen carboxyl groups, creating stable cross-links that prevent putrefaction and impart thermal stability. This interaction stabilizes the collagen structure, making the leather resistant to heat, moisture, and microbial attack. The degree of cross-linking is influenced by the basicity and pH of the solution, which affect penetration and reaction rate. Proper control of these parameters ensures uniform tanning and consistent leather quality.
Common Materials
Chromium(III) sulfate, Sodium formate, Water
Technical Parameters
ParameterTypical rangeNotes & selection driver
Chromium Oxide ContentRequired25–30 %Primary active ingredient concentrationISO 5398-1
BasicityRequired33–42 %Degree of neutralization affecting penetration rateISO 5398-3
pH ValueRequired2.8–3.5 pHSolution acidity for optimal tanning conditionsISO 4045
Specific GravityRequired1.20–1.30 g/cm³Density at standard temperatureISO 6504
Viscosity10–20 cPFlow characteristics for pumping and mixingISO 2555
Iron Content≤0.1 ppmMaximum impurity level for quality leatherISO 5398-2
Chrome Content12–15 %Total chromium as Cr2O3 basis.ISO 5398-1
Sulfate Content≤5 %High sulfate affects basicity and leather quality.ISO 5398-4
Chloride Content≤0.5 %Excess chloride can cause corrosion.ISO 5398-5
Water Insoluble Matter≤0.5 %Indicates purity and filtration ease.ISO 5398-6
Density1.20–1.30 kg/LSame as specific gravity, used for volume calculations.ISO 6504
Storage Temperature5–35 °CAvoid freezing and high heat to prevent degradation.
Shelf Life12 monthsStable under recommended storage conditions.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Chromium Sulfate Complex Part
    Primary tanning agent forming collagen cross-links
    Material: Chromium(III) sulfate octadecahydrate
  • Basicity Modifier Part
    Controls neutralization level for penetration control
    Material: Sodium formate or sodium bicarbonate
  • Solvent Medium Part
    Carrier for uniform distribution in tanning drums
    Material: Deionized water
  • Stabilizing Agent Optional Part
    Prevents precipitation and maintains solution homogeneity
    Material: Organic acid salts

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Chrome Tanning Agent Solution.

chrome tanning liquor chromium tanning solution basic chromium sulfate solution

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 2 bar (max)
flow rate: 0.5-5 m³/h per unit
temperature: 15-35°C (optimal), 5-45°C (operational)
slurry concentration: 5-25% solids by weight
Media Compatibility
✓ Stainless Steel 316L ✓ Polypropylene (PP) ✓ High-Density Polyethylene (HDPE)
Unsuitable: Aluminum or copper alloys (due to chromium corrosion)
Sizing Data Required
  • Daily leather processing volume (kg)
  • Target chromium oxide concentration in final leather (%)
  • Available tank/reactor volume (m³)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Corrosion-induced leakage
Cause: Chrome tanning agents (chromium salts) are highly corrosive and acidic (pH 2-4). Prolonged exposure to stainless steel or mild steel components (pumps, valves, piping) leads to pitting, crevice corrosion, and eventual failure of seals and gaskets, especially at joints and welds.
Crystallization and clogging
Cause: Evaporation or temperature fluctuations cause chromium salts to crystallize and precipitate out of solution. This leads to buildup in pipes, nozzles, valves, and pump internals, restricting flow, increasing pressure, and causing mechanical blockages or abrasive wear.
Maintenance Indicators
  • Visible greenish stains or weeping at pipe joints, pump seals, or tank seams, indicating active corrosion and potential leakage.
  • Audible pump cavitation (gurgling/knocking) or reduced flow rate, signaling crystallization buildup or partial blockages in the system.
Engineering Tips
  • Use corrosion-resistant materials: Specify high-grade stainless steel (e.g., 316L, duplex) or lined (PTFE, rubber) components for all wetted parts. Ensure proper passivation and avoid galvanic couples.
  • Maintain solution stability: Control temperature within a narrow range (per manufacturer specs) and avoid stagnant conditions. Implement regular flushing with compatible solvents (e.g., diluted acid) to prevent crystallization, especially after shutdowns.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 5398-1:2018 Leather - Chemical determination of chromium oxide content - Part 1: Quantification by titration ASTM D2807-93(2021) Standard Test Method for Chromic Oxide in Leather (Perchloric Acid Oxidation) DIN 53314:1996 Testing of leather - Determination of the chromium(VI) content

Quoted from the published standard.

Manufacturing Precision
  • Chromic oxide concentration: +/- 0.5% by mass
  • pH value: +/- 0.2 units
Quality Inspection
  • Atomic Absorption Spectroscopy (AAS) for chromium content verification
  • pH measurement and titration for alkalinity/acidity control

Manufacturers of Chrome Tanning Agent Solution

Manufacturer profiles associated with Chrome Tanning Agent Solution.

Sourcing Chrome Tanning Agent Solution from China?
Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.
Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the primary active ingredient in Chrome Tanning Agent Solution?

The primary active ingredient is chromium(III) sulfate, present as trivalent chromium salts in an aqueous solution.

What are the typical chromium oxide content and basicity ranges?

Chromium oxide content is typically 25–30%, and basicity ranges from 33–42%, as per ISO 5398-1 and ISO 5398-3.

What is the recommended storage temperature and shelf life?

Store at 5–35°C to avoid freezing or high heat. Shelf life is 12 months under recommended conditions.

How should the solution be handled in industrial tanning processes?

It should be used in tanning drums with precise concentration control. Always verify specific parameters with the manufacturer for your application.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.
Buyer enquiry

Request manufacturing insight for Chrome Tanning Agent Solution

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes
Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here
We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman
CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim
A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Sorry, we couldn't send your message. Please try again, or email us at contact@cnfx.com.

Need to Manufacture Chrome Tanning Agent Solution?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
Integrated Leather Processing System
Last Product
Get QuotesChat