What is the Difference Between Double and Triple Pressed Stearic Acid?
🆚 Go to Comparative Table 🆚The main difference between double and triple pressed stearic acid lies in their purity and iodine content. Stearic acid, also known as octadecanoic acid, is a common saturated fatty acid found in various animal fats and vegetable oils. It is a solid waxy compound with the chemical formula C₁₇H₃₅COOH.
- Double Pressed Stearic Acid: This is a commercial grade of stearic acid that is less refined than triple pressed stearic acid. It contains more impurities and unwanted substances than the triple pressed form. The properties of this commercial-grade depend on the manufacturer.
- Triple Pressed Stearic Acid: This is a more refined and purer form of stearic acid compared to double pressed stearic acid. It has a significantly lower iodine content when compared to double pressed stearic acid. Triple pressed stearic acid is often used in food and beverage, pharmaceutical, and candle manufacturing industries.
In summary, the key difference between double and triple pressed stearic acid is their purity and iodine content, with triple pressed stearic acid being purer and having a lower iodine content than double pressed stearic acid.
Comparative Table: Double vs Triple Pressed Stearic Acid
The main difference between double and triple pressed stearic acid lies in their purity and refining process. Here is a comparison of the two:
Property | Double Pressed Stearic Acid | Triple Pressed Stearic Acid |
---|---|---|
Purity | Comparatively less pure | Purer, when comparing both |
Iodine Value | Very high when comparing both | Comparatively very low |
Source | Mainly derived from animal fats & oils, and vegetable oils | Mainly sourced from vegetable oils, such as palm oil |
Applications | Used in candle manufacturing, low-end plastic products, and some food applications | Used in food, cosmetics, and pharmaceuticals |
C18 Content | 20-30% | 40-44% |
Acid Value | 212.0 – 225.0 mgKOH/g | 207.0 – 211.0 mgKOH/g |
Saponification Value | 213 – 226 mgKOH/g | 208 – 212 mgKOH/g |
Titer | 53 – 57°C | 53 – 57°C |
Triple pressed stearic acid is more refined than double pressed stearic acid, resulting in a higher purity and lower iodine value. Triple pressed stearic acid is commonly used in food, cosmetics, and pharmaceuticals due to its purity, while double pressed stearic acid is mainly used in candle manufacturing and low-end plastic products.
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