Chrome-free Zeolite Tanning Agent CAS 68989-22-0 is a sustainable, inorganic aluminosilicate mineral chemically based on the synthetic Zeolite A structure , functioning primarily as a heavy-metal-free alternative to traditional Chromium salts in leather production. Unlike conventional chrome tanning which yields "Wet Blue," this eco-friendly agent interacts with collagen fibers to produce "Wet White" leather, eliminating the risk of Hexavalent Chromium (Cr VI) formation and significantly improving the biodegradability of leather waste. We provide professional access to this material with competitive factory pricing and the ability to meet customized specifications (optimized particle size for deep penetration) for various manufacturing requirements. Our commitment to technical transparency ensures that every shipment is accompanied by comprehensive MSDS, TDS, COA documentation to support your quality assurance protocols, and we maintain capacity for consistent bulk supply to facilitate large-scale industrial operations.
Chrome-free Zeolite Tanning Agent CAS 68989-22-0
- CAS: 68989-22-0
- Synonyms: Sodium Aluminosilicate, Synthetic Zeolite A, Eco-tanning agent, Wet White tanning agent, Zeolites NaA, Chrome-free leather auxiliary
- Einecs: 273-541-5
- Grade: Tanning Grade / Technical Grade
- Package: 25kg Multi-ply paper bags or 650kg Jumbo Bags, palletized and shrink-wrapped.
Product Description
Physicochemical Properties
Our Zeolite Tanning Agent is processed to ensure specific particle size distribution for optimal penetration into the collagen matrix.
| Property | Specification |
|---|---|
| Appearance | Fine White to Off-White Powder |
| Purity (Active Zeolite Content) | ≥ 90% |
| pH Value (5% Suspension) | 9.0 – 11.0 |
| Average Particle Size (D50) | ≤ 4.0 µm |
| Bulk Density | 0.45 – 0.65 g/cm³ |
| Aluminum Oxide (Al₂O₃) | 26% – 32% |
| Silicon Dioxide (SiO₂) | 30% – 38% |
| Solubility | Insoluble in water (forms stable suspension); Soluble in strong acids |
| Loss on Ignition (LOI) | ≤ 15% |
Applications
This product is engineered specifically for the leather tanning and retanning processes, offering versatility across various hide types.
1. Primary Tanning (Wet White Production) Used as the main tanning agent to replace Basic Chrome Sulfate. It interacts with the carboxyl groups of the collagen fibers. It produces leather with a shrinkage temperature (Ts) of up to 75°C-80°C alone, or higher when combined with vegetable tannins or aldehydes. The resulting leather is white, allowing for brilliant pastel dyeing results.
2. Retanning and Filling In the retanning stage, it acts as a selective filling agent. Because of its specific cage-like molecular structure, it selectively fills the looser parts of the hide (flanks and bellies), improving the cutting yield. It enhances the fullness and tightness of the grain.
3. Automotive and Upholstery Leather Due to its mineral nature, it does not contribute to fogging or VOC emissions, making it ideal for high-specification automotive interiors where “Chrome-free” is increasingly a standard requirement.
4. Eco-friendly/Infant Leather Goods Ideal for products requiring hypoallergenic properties, as it eliminates heavy metal risks associated with chrome tanning.
Quality Assurance
Reliability is paramount in leather production. Our manufacturing process adheres to ISO 9001:2015 standards. We employ advanced analytical techniques to ensure batch-to-batch consistency:
- X-Ray Diffraction (XRD): Used to verify the crystalline structure and phase purity of the Zeolite, ensuring the correct aluminosilicate framework is present.
- Laser Diffraction Particle Size Analysis: We strictly control particle size (<4µm) to ensure the powder penetrates the hide cross-section rather than depositing on the surface.
- Heavy Metal Screening: Rigorous testing ensures the product is free from unintended heavy metal contamination (Lead, Cadmium, Mercury).
Storage & Safety
Storage Conditions:
- Moisture Control: Zeolites are highly hygroscopic (water-absorbing). Store in a cool, dry, and ventilated warehouse. Keep bags tightly sealed.
- Segregation: Store away from volatile acids and strong odors, as the product’s porous structure can adsorb atmospheric contaminants.
- Shelf Life: 24 months from the date of manufacture when stored in original unopened packaging.
Safety Precautions:
- Respiratory Protection: This product is a fine powder. Inhalation of dust may cause respiratory irritation. Operators must wear NIOSH-approved dust masks (N95 or P2) during weighing and dosing.
- Skin & Eye Contact: It is alkaline. Wear safety goggles and protective gloves. In case of eye contact, flush thoroughly with water for 15 minutes.
- Spill Management: Sweep up spills gently to avoid creating dust clouds.
- Refer to the Material Safety Data Sheet (MSDS/SDS) for comprehensive safety data.
Switch to Sustainable Tanning Today. For technical data sheets (TDS), application recipes, or commercial inquiries, please contact our export team.
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FAQ - Technical & Supply Chain
-
Q:
How does Zeolite (CAS 68989-22-0) compare to Glutaraldehyde for chrome-free tanning?
A: Zeolite offers a superior environmental profile.While Glutaraldehyde is a common chrome-free alternative, it is an aldehyde that can release volatile organic compounds (VOCs) and has sensitization risks. Zeolite CAS 68989-22-0 is an inorganic mineral that is non-toxic, odorless, and produces leather with better physical fullness and tighter grain structure compared to pure aldehyde tanning.View source details for citation from Dugros. Opens side panel. -
Q:
Can this agent be used in combination with vegetable tannins?
A: Yes. Zeolite tanning agents are highly synergistic with vegetable tannins. When used as a pre-tanning or retanning agent, the Zeolite structure helps to disperse the large vegetable tannin molecules, promoting deeper penetration and resulting in leather that combines the softness of mineral tanning with the natural character of vegetable tanned leather.
Documents and Product Support
For product review and sourcing evaluation, supporting documents can be coordinated according to the product type, inquiry stage, and order requirements.
- COA for batch-based quality reference
- TDS for key physical and chemical information
- SDS / MSDS for handling, storage, and safety reference
- Packing information for sample, trial, and bulk orders
- Technical communication based on application and specification requirements
Information to Confirm Before Quotation
Clear sourcing information helps reduce specification mismatch and allows a more accurate quotation before sample or bulk order discussion.
- Product name and CAS number
- Application or intended end use
- Required purity, grade, or specification
- Sample quantity, trial order, or bulk demand
- Preferred packing form or net weight
- Destination country or port
- Required documents or compliance expectations
Packaging, Storage, and Handling Notes
Packaging form, storage conditions, shelf life, and shipment arrangements should be confirmed according to the product characteristics, package size, and destination requirements.
Before order confirmation, buyers are advised to review the corresponding product documents and confirm whether any special storage, labeling, or handling requirements apply.
Sample, Bulk Order and Repeat Supply Support
Support can be arranged for sample discussion, bulk supply planning, packaging confirmation, and routine sourcing communication based on the actual product and order requirements.
For repeat-use formulations or long-term procurement plans, buyers may discuss specification consistency, packaging preferences, delivery expectations, and document coordination in advance.