Propylheptanol is a mixture of isomeric decyl alcohols: 2-propylheptanol, 4-methyl-2-propylhexanol and 5-methyl-2-propylhexanol. It is a clear and colorless, high boiling liquid with a mild characteristic odor. It is miscible with most common organic solvents but has very low water solubility. Phthalate esters prepared from this alcohol offer a number of advantages for flexible PVC applications, such as low volatility in vinyl for automotive products, long-term property retention, and excellent outdoor performance properties. The performance properties of phthalic acid esters can be modified for an advantageous cost/benefit position by varying the alcohol moiety of the ester molecule in the practical range of C4â€“C13 and by specifying the linearity of the alcohol main chain. The C8, C9, and C10 alcohols produce esters of most value as PVC plasticizers. Applications: The main application for propyl heptanol is as a starting material for the production of plasticizers for PVC that is to say it is predominately used as alchol component in plasticizer manufacturing. It is mainly used for the production of plasticizers for wire and cable, outdoor, automotive interior and general purpose applications, as well as for surfactants and other chemical intermediates. Plasticised PVC based on 2-propyl heptanol is used for applications such as cable insulation, tarpaulin fabrics, elastic floor coverings, and in various automobile parts. Due to the increasing technical and environmental requirements for plasticised PVC applications, the high-molecular-weight plasticisers, which are based on C9 or C10 alcohols such as 2-propyl heptanol with its ten carbon atoms, are particularly in high demand. These plasticisers are remarkable for their excellent low-temperature properties and low volatility and are extremely versatile. Most plasticizer alcohols are produced by the oxonation process from primary olefins, of which ethylene, propylene, and butene are the major refinery products available on a world scale at costs acceptable to the application. Propylheptanol can be stored in tanks and drums constructed from normal carbon steel. Propylheptanol can be stored for at least one year at temperatures below 40 Â°C, if moisture is excluded. The demand for plasticised PVC is about 12 million tonnes per year with an annual growth rate of 4%. The highest demand for plasticisers comes from Asia and Europe. Due to the versatile and cost-effective nature of PVC, worldwide future growth is expected to increase by 3% to 4% annually. Coming to India, there is no production of 2-propyl heptanol at present in the country. The Indian requirements are met by imports and the present Indian import is around 1000 tonnes per annum. New entrepreneurs can create new capacity for this product in India owing to its major applications.