Overview
Pentadecanoic acid, also known as n-pentadecanoic acid, is a saturated fatty acid with a 15-carbon chain. It is naturally present in dairy fats and some vegetable oils, though in smaller quantities compared to other fatty acids. Industrially, it is synthesized for use in various applications, including cosmetics, pharmaceuticals, and as a chemical intermediate. Pentadecanoic acid is valued for its stability and compatibility with other organic compounds. Its relatively high melting point makes it suitable for formulations requiring solid fatty acids. While not as common as palmitic or stearic acid, it serves niche roles in specialized chemical processes.
Physical and Chemical Properties
Pentadecanoic acid is a white crystalline solid at room temperature, with a melting point of 52-54°C and a boiling point of 257°C at reduced pressure. It is insoluble in water but dissolves readily in organic solvents such as ethanol, ether, and chloroform. The compound has a density of 0.843 g/cm³ at 20°C. Chemically, pentadecanoic acid is a saturated fatty acid, meaning it lacks double bonds in its carbon chain. This structure contributes to its stability and resistance to oxidation under normal conditions. Its molecular weight is 242.40 g/mol, and it is typically supplied in powdered or flake form for industrial use.
Main Applications
Pentadecanoic acid is primarily used in the cosmetics industry as an emollient and thickening agent in creams and lotions. Its saturated structure provides stability and a smooth texture to formulations. In pharmaceuticals, it serves as an excipient in tablet coatings and ointments. The chemical industry employs pentadecanoic acid as an intermediate in the synthesis of esters, surfactants, and other derivatives. It is also used in research laboratories as a standard for fatty acid analysis. While its applications are specialized, demand exists in niche markets requiring high-purity fatty acids.
Safety and Storage
Pentadecanoic acid is generally stable but should be handled with care to avoid inhalation or skin contact. Personal protective equipment (PPE), including gloves and goggles, is recommended when working with the compound. In case of contact, rinse affected areas with plenty of water. Storage should be in a cool, dry place, away from oxidizing agents and direct sunlight. The compound is not highly flammable but should be kept away from open flames. Properly sealed containers are essential to prevent contamination and degradation over time.
B2B Procurement Guide
When procuring pentadecanoic acid, B2B buyers should prioritize purity levels, which typically range from 95% to 99%. Supplier certifications, such as ISO or GMP compliance, are indicators of quality. Pricing varies based on quantity, with bulk purchases often attracting discounts. Lead times can vary depending on supplier stock, so advance planning is advisable. Buyers should also inquire about packaging options, as some suppliers offer custom quantities to meet specific needs. Sample testing before large-scale procurement is recommended to ensure product suitability.
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