---
title: "Chrome Tanning Agent Solution"
industry: "Tanning and Dressing of Leather"
verification_protocol:
  urn: "URN:CNFX:ME:CHROME_TANNING_AGENT_SOLUTION"
  data_integrity_hash: "54307e8d9230fc3df4d1bcb449c540ce"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:CHROME_TANNING_AGENT_SOLUTION"
  data_source_uri: "https://cnfx.com/llms/industry/tanning-dressing-leather/product/chrome-tanning-agent-solution.md"
  official_resource_url: "https://cnfx.com/industry/tanning-dressing-leather/product/chrome-tanning-agent-solution"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "1.2-3.5 bar at 35-45°C"
    unit: "%"
  secondary_spec:
    status: "config-dependent"
    typical_range: "1.2-3.5 bar at 35-45°C"
    unit: "°Bé"
engineering_limits:
  max_safe_operating_point:
    value: 4.2
    unit: "or"
    consequence: "Chromium(III) hydroxide precipitation due to pH shift beyond solubility product (Ksp = 6.3×10⁻³¹) or hexavalent chromium reduction at Eh &lt; -0.74V"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Sulfuric acid dosing pump calibration drift exceeding ±0.5% FS"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Redundant pH probes with 4-20mA HART transmitters and automated acid dosing PID control with ±0.1 pH deadband"
  - node_2:
      trigger: "Redox potential controller failure maintaining Eh at -0.8V for &gt;15 minutes"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "ORP electrode with platinum sensing element and automated sodium dichromate dosing at Eh threshold -0.72V"
bom_nodes:
  chromium-sulfate-complex:
    type: "component"
    urn: "URN:CNFX:ME:CHROMIUM_SULFATE_COMPLEX"
    interface_type: "physical-logic-coupled"
  basicity-modifier:
    type: "component"
    urn: "URN:CNFX:ME:BASICITY_MODIFIER"
    interface_type: "physical-logic-coupled"
  solvent-medium:
    type: "component"
    urn: "URN:CNFX:ME:SOLVENT_MEDIUM"
    interface_type: "physical-logic-coupled"
  stabilizing-agent:
    type: "component"
    urn: "URN:CNFX:ME:STABILIZING_AGENT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5398-1:2018 LEATHER - CHEMICAL DETERMINATION OF CHROMIUM OXIDE CONTENT - PART 1: QUANTIFICATION BY TITRATION"
    scope: "Verified Engineering Specification"
  - standard: "ASTM D2807-93(2021) STANDARD TEST METHOD FOR CHROMIC OXIDE IN LEATHER (PERCHLORIC ACID OXIDATION)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 53314:1996 TESTING OF LEATHER - DETERMINATION OF THE CHROMIUM(VI) CONTENT"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/tanning-dressing-leather/product/chrome-tanning-agent-solution.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "554f4c6bf7af0238d18a2ce70dd5c4db5328a2dde82a718eec43a3b7df54bba6"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Chrome Tanning Agent Solution

## 1. Technical Definition
Industrial chromium-based chemical solution for leather tanning

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1.2-3.5 bar at 35-45°C**. Failure boundary: **Chromium(III) precipitation at pH &gt; 4.2 or Cr(VI) formation at redox potential &lt; -0.74V vs SHE**, Mechanism: **Chromium(III) hydroxide precipitation due to pH shift beyond solubility product (Ksp = 6.3×10⁻³¹) or hexavalent chromium reduction at Eh &lt; -0.74V**.

### 2.1 Analytical Physics Model
Governed by the **Hansen Solubility Distance (HSP)**:

> **Primary Equation**: $R_a = \sqrt{4\Delta\delta_d^2 + \Delta\delta_p^2 + \Delta\delta_h^2}$  
> **Engineering Impact**: Predicts seal/gasket swelling when exposed to CIP chemicals.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \delta_d | Dispersive | Engineering Constant |
| \delta_p | Polar | Engineering Constant |
| \delta_h | Hydrogen | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Sulfuric acid dosing pump calibration drift exceeding ±0.5% FS | 8 | pH excursion to 4.5 causing Cr(OH)₃ precipitation and solution viscosity increase to &gt;150 cP | Redundant pH probes with 4-20mA HART transmitters and automated acid dosing PID control with ±0.1 pH deadband |
| Redox potential controller failure maintaining Eh at -0.8V for &gt;15 minutes | 8 | Cr(VI) reduction to Cr(III) exceeding 8% concentration loss per hour | ORP electrode with platinum sensing element and automated sodium dichromate dosing at Eh threshold -0.72V |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | % | Verified |
| secondary_spec | Config-dependent | °Bé | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Drum Tanning Machine**, **Leather Drying Tunnel**, **Wastewater Treatment System**  
**Downstream Applications**: Full-Grain Leather, Suede Leather, Nappa Leather  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the typical chromium oxide content in this chrome tanning agent solution?
**A**: The chromium oxide (Cr₂O₃) content typically ranges from 20-25%, providing optimal tanning efficiency while maintaining leather quality and environmental compliance.

### Q: How does the basicity percentage affect leather tanning results?
**A**: Basicity (typically 33-40%) determines the solution's reactivity and penetration rate. Higher basicity improves chromium fixation and reduces effluent, while lower basicity enhances penetration in dense hides.

### Q: What safety precautions are required when handling this chrome tanning solution?
**A**: Use PPE (gloves, goggles, protective clothing), ensure proper ventilation, avoid skin contact, and follow local regulations for chromium compound handling and wastewater treatment to prevent environmental contamination.

## 6. Manufacturing Compliance
- 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

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Chrome Tanning Agent Solution](https://cnfx.com/industry/tanning-dressing-leather/product/chrome-tanning-agent-solution)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: CHROME_TANNING_AGENT_SOLUTION | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f0168718
