Overview
Palmitic acid is one of the most common saturated fatty acids found in animals, plants, and microorganisms. It accounts for 20-30% of total fatty acids in the human body and is a key component of palm oil (44% content) and butter (25%). Industrially, it is produced by hydrolyzing fats/oils or through synthetic processes. As a versatile chemical, palmitic acid serves as a precursor for derivatives like sodium palmitate (soap) and cetyl alcohol. Its amphiphilic nature makes it valuable in emulsifiers, while its stability suits high-temperature applications like lubricants.
Physical and Chemical Properties
Palmitic acid is a white, waxy solid at room temperature with a faint fatty odor. Its crystalline structure transitions from hexagonal to monoclinic forms upon heating. The compound is non-reactive under standard conditions but undergoes esterification, saponification, and hydrogenation reactions. With a low water solubility (0.002 g/L at 20°C), it dissolves readily in organic solvents. Its high boiling point (351°C) ensures thermal stability in industrial processes. The acid’s hydrophobicity is quantified by a logP value of 6.8, indicating strong lipid affinity.
Main Applications
In food production, palmitic acid acts as a texturizer and preservative (E570). It is used in margarine, shortening, and dairy substitutes. The cosmetics industry employs it in creams, lotions, and soaps for its emollient and surfactant properties. Industrially, it functions as a lubricant additive, plasticizer for PVC, and raw material for biodiesel. Pharmaceutical formulations utilize its derivatives for drug delivery systems. Recent research explores its role in biodegradable polymers and renewable energy applications.
Safety and Storage
Palmitic acid poses minimal acute toxicity (LD50 >10g/kg orally in rats) but may irritate skin/eyes upon prolonged contact. Dust inhalation should be avoided; use PPE (gloves, goggles) during handling. Storage requires temperatures below 30°C in tightly sealed containers to prevent oxidation. Compatibility issues arise with strong oxidizers, bases, and reactive metals. For large-scale storage, steel or polyethylene containers are recommended. Shelf life typically exceeds two years when stored properly.
B2B Procurement Guide
Bulk buyers should prioritize suppliers with ISO 9001 certification and batch-specific COAs (Certificates of Analysis). Key specifications include acid value (210-220 mg KOH/g), iodine value (≤1 g I2/100g), and melting point consistency. Logistics considerations: Opt for pelletized forms to reduce dust hazards during transport. For international shipments, ensure compliance with REACH (EU) or TSCA (US) regulations. MOQs commonly start at 1 metric ton, with discounts for 10+ ton orders.
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