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Send EmailMimosa ME, Acacia Extract, Wattle Extract, Mimosa Tanin, 68911-60-4
MIMOSA ME (MIMOSA TANNIN)
CHEMICAL PROFILE & IDENTIFICATION
| Parameter | Information |
|---|---|
| Product Name | Mimosa ME |
| Chemical Type | Vegetable tannin (condensed/catechol tannin) |
| CAS Number | 68911-60-4 |
| Other Names | Acacia Extract, Wattle Extract, Mimosa Tanin |
| Source | Bark of Black Wattle (Acacia mearnsii) trees |
| E Number | Not applicable |
SECTION 1: PHYSICAL AND CHEMICAL PROPERTIES
| Property | Value |
|---|---|
| Physical State | Solid (spray-dried powder or solid block) or liquid extract |
| Color | Light beige/pink-brown; light-colored extracts are preferred |
| Odor | Characteristic sweet odor |
| Solubility | High solubility in water (cold and hot); tap water soluble |
| pH (1:10 solution) | 4.0 - 4.8 |
| Tannin Content | ~70% ± 1.0 |
| Non-Tannins | ~20% |
| Insolubles | ≤ 0.5% |
| Moisture Content | ~4.0% |
| Mineral Ash | ≤ 0.4% |
| Iron (Fe) | < 0.00025 ppm |
| Ionic Character | Anionic |
SECTION 2: CHEMICAL COMPOSITION & STRUCTURE
Classification
Mimosa tannins belong to the catechol or condensed tannins class (proanthocyanidins) .
Structural Features
-
Starter Units: Catechin or gallocatechin (angularly bonded)
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Extender Units: 5-deoxy flavan-3-ols (fisetinidol and predominantly robinetinidol)
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Oligomer Size: Predominantly dimers and trimers
-
Molecular Mass: Average ~1250 units
Key Chemical Properties
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Low concentration of salts and acids
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Rapid rate of penetration through the pelt
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Good stability to enzyme action (yeast/mould resistance)
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High solubility; low formation of sludge
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Good fixation of tannin to collagen
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Stable against bacterial and fungal attack
-
Condensed tannins tend to oxidise and darken on exposure to air and light
SECTION 3: MIMOSA ME APPLICATION
3.1 Vegetable Tannage
| Application | Dosage | Notes |
|---|---|---|
| Sole Leather | Up to 40% | Can be used alone or with other extracts |
| Strap and Case Leather | 10-20% | Can be used with Mimosa WS, Mimosa FS and Mimosa RG |
3.2 Re-tannage of Chrome Leather
| Application | Dosage | Notes |
|---|---|---|
| Standard Retannage | 5-10% | Recommended starting dosage |
| Heavy Retannage | 10-20% | Depending on desired feel of the leather |
3.3 Other Application Guidelines
| Application | Dosage | Based On |
|---|---|---|
| Vachetta Tannage (Veg Leather) | 25-30% | Limed weight |
| Sole Tannage | 40-45% | Limed weight |
SECTION 4: PROPERTIES & ADVANTAGES
| Property | Description |
|---|---|
| Fast Penetration | Rapid rate of penetration through the pelt |
| Excellent Yield | Good fixation to collagen |
| Light Color | Produces pleasant light pink/brown colour; very light colour leathers |
| Good Fixation | Stable tannin-collagen bonding |
| High Solubility | Easily dissolves in cold and hot water |
| Low Sludge | Low formation of sludge in pits |
| Versatile | Suitable for both vegetable tannage and chrome retannage |
SECTION 5: TYPICAL APPLICATIONS
| Leather Type | Application |
|---|---|
| Heavy Leathers | Sole, saddlery, insole, case, belt, industrial leathers |
| Light Leathers | Upholstery, garment, lining, shoe upper leathers |
| Chrome Leather Retannage | Box-cow, harness, calf leather |
| Flexible/Semi-Firm Leather | All types of flexible leather manufacture |
| East Indian Leather | Traditional leather production |
SECTION 6: SPECIAL PROCESSING FORMS
| Product | Feature |
|---|---|
| Mimosa GS | Dedusted powder; light color; suitable for rapid tannage |
| Mimosa FS | Dedusted powder; fast penetration; light color |
| Mimosa WS | Modified tannin; wet-white pretannage |
| Mimosa RG | Modified tannin; special applications |
| Mimosa AL | Wet white processes |
SECTION 7: STORAGE
| Parameter | Information |
|---|---|
| Storage Conditions | Dry premises, protected from sunlight |
| Container | Closed bags, original packaging |
| Stability | Maintains characteristics if properly stored |
| Shelf Life | Up to 24 months under proper storage |
LEGAL DISCLAIMER
The information provided in this document is based on our current knowledge and experience and is presented in good faith; however, as all conditions of use are beyond our control, it does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing the suitability for their own applications. For complete safety, storage, use, handling, disposal, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS) provided by the manufacturer/supplier.
