Stearic acid, scientifically known as octadecanoic acid, is a fundamental saturated fatty acid characterized by its 18-carbon chain. Its chemical structure, CH3(CH2)16COOH, dictates its physical and chemical properties, making it a vital raw material in numerous manufacturing processes. NINGBO INNO PHARMCHEM CO.,LTD. understands the importance of these properties for industrial applications.

As a saturated fatty acid, stearic acid is relatively stable and has a higher melting point compared to unsaturated fatty acids. Its melting point typically ranges around 69-70°C (156-158°F), causing it to exist as a waxy solid at room temperature. This solid form, often appearing as white or off-white flakes or beads, is easy to handle and incorporate into various formulations. Stearic acid is characterized by its low solubility in water but good solubility in organic solvents and oils, a property that is leveraged in its use as an emulsifier and surfactant.

The bifunctional nature of stearic acid, possessing both a hydrophobic hydrocarbon tail and a hydrophilic carboxylic acid head group, allows it to reduce surface tension between different phases, such as oil and water. This makes it an effective emulsifying agent, essential for creating stable mixtures in products ranging from lotions to industrial lubricants. The presence of a carboxyl group also allows stearic acid to form salts, known as stearates, with various metal cations. These metal stearates, such as zinc stearate or calcium stearate, have distinct properties and are used as lubricants, release agents, and stabilizers in industries like plastics and rubber manufacturing.

The purity and form of stearic acid, such as 'stearic acid cosmetic grade' or 'stearic acid industrial grade,' are critical depending on the intended application. For cosmetic purposes, high purity is essential to ensure safety and efficacy on the skin. In industrial settings, specific grades might be chosen for their enhanced lubricating or stabilizing properties. The chemical industry consistently relies on suppliers that can provide stearic acid with consistent specifications to ensure predictable performance in their processes. When considering stearic acid purchasing, understanding these chemical properties is key to selecting the right grade. NINGBO INNO PHARMCHEM CO.,LTD. offers various grades of stearic acid to meet the diverse needs of its industrial clientele, ensuring reliable supply and quality.