Rubber Grade Stearic Acid
Rubber Grade Stearic Acid
Rubber Grade Stearic Acid is an exceptionally high-purity, long-chain saturated fatty acid featuring an 18-carbon backbone. Sourced from renewable vegetable palm oil, it boasts a chemical formula of C₁₈H₃₆O₂ and is systematically designated as Octadecanoic acid.
This premium grade is obtained through the hydrolysis of vegetable and animal oils and fats, followed by crystallization or distillation. Pressing techniques are employed to isolate the solid saturated fatty acids from the liquid unsaturated fatty acids. The triple-pressed process refines the product to an ultra-high concentration, making it ideal for applications demanding the utmost purity.
Beyond its application in personal care, rubber grade stearic acid is also vital for preserving the form and uniformity of products such as soaps, candles, oil pastels, and hard candies.
Rubber Grade Stearic Acid Specification
| Parameter | Specification |
|---|---|
| Product Name | Rubber Grade Stearic Acid |
| Chemical Name | Octadecanoic Acid (mixture with Palmitic Acid) |
| INCI Name | Stearic Acid |
| CAS No. | 57-11-4 |
| HS Code | 3823.11.0000 |
| EINECS No. | 200-313-4 |
| Molecular Formula | C₁₈H₃₆O₂ |
| Appearance | Light-colored waxy solid (flake, bead, or powder form) |
| Odour | Characteristic fatty odour |
| Origin | Vegetable (Palm Oil) or Tallow |
Quality Parameters
| Parameter | Method / Reference | Specification | Typical Value |
|---|---|---|---|
| Acid Value (mg KOH/g) | AOCS Te 1a-64 | 193 – 214 | 195 – 210 |
| Saponification Value (mg KOH/g) | AOCS Tl 1a-64 | 195 – 214 | 196 – 212 |
| Iodine Value (g I₂/100g) | AOCS Tg 1a-64 | 4 – 10 Max | 4 – 8 |
| Titre (°C) | AOCS Tr 1a-64 | 52 Min | 52 – 55 |
| Colour (Gardner) | — | 4 Max | 2 – 4 |
| Specific Gravity | — | 0.85 | 0.85 |
| Melting Point (°C) | — | ~70 | 68 – 72 |
| Moisture (%) | — | 0.30 Max | 0.15 – 0.25 |
| Unsaponifiable Matter (%) | — | 2.0 Max | 1.0 – 1.5 |
Fatty Acid Composition (Typical)
| Fatty Acid | Carbon Chain | Specification (%) | Typical Value |
|---|---|---|---|
| Myristic Acid | C14:0 | 0 – 3 | 3 |
| Palmitic Acid | C16:0 | 45 – 55 | 50 |
| Margaric Acid | C17:0 | 0 – 5 | 3 |
| Stearic Acid | C18:0 | 20 – 55 | 35 – 36 |
| Oleic Acid | C18:1 | 5 – 12 | 9 |
Rubber Grade Stearic Acid Uses
Rubber Grade Stearic Acid is utilized across a broad spectrum of personal care and home care products, including moisturizers, sunscreens, cosmetics, makeup, soap, body lotions, and laundry items.
Commonly referred to as stearin, this palm-derived product is employed in creams and lotions as a skin-softening agent and consistency regulator.
In candles, it aids in generating firmer wax with an extended burn duration and improved opacity. Furthermore, in soaps, stearic acid assists in hardening the formulation.
Applications in Cosmetic & Personal Care
Rubber Grade Stearic Acid is utilized in cosmetic and personal care preparations including soaps, lotions, creams, and makeup. Functioning as an emulsifier, thickening agent, and stabilizer, it assists in preserving the texture and consistency of these products.
Applications in Candles
Rubber Grade Stearic Acid for candles – solidifies the wax, amplifies the burn, minimizes dripping, and elevates quality. A vital candle additive for exceptional performance.
Applications in Pharmaceuticals
Rubber Grade Stearic Acid for pharmaceuticals – functions as a lubricating agent in the manufacture of tablets and capsules. It prevents adhesion throughout the production process
Applications in Plastic Industries
Rubber Grade Stearic Acid is occasionally employed as a mold release agent within the plastics sector.
Applications in Textile Industry
Rubber Grade Stearic Acid is utilized to reinforce yarn. When blended with castor oil, it is additionally employed to formulate softeners for textile sizing.
Applications in Rubber Industry
Rubber Grade Stearic Acid acts as a softening agent, processing aid, and vulcanization accelerator. It promotes efficient processing and molding.
Packaging
| Packaging Type | Typical Size / Capacity | 20ft Container Loading (Net Weight) |
|---|---|---|
| 25 kg PP Laminated Bags (loose stuffed) | 25 kg / bag | 17 MT (640 bags, unpalletized) |
| 25 kg PP Laminated Bags (palletized) | 25 kg / bag | 14 MT (560 bags) |
| 500/600 kg Jumbo Bags (flakes & beads, palletized) | 500/600 kg / bag | ≈ 14 MT (palletized) |
| 700 kg Jumbo Bags (beads, palletized) | 700 kg / bag | 14 MT (20 bags) |
Certification
| Certification | Issuing Body / Standard |
|---|---|
| MSPO | MSPO 2.0 (MS2530:2022) |
| Halal | JAKIM |
| Kosher | Recognized agencies (e.g., STAR-K) |
| ISO 9001 | International Organization for Standardization |
| ISO 14001 | International Organization for Standardization |
| GMP | Good Manufacturing Practices |