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Resin acid refers to any of several related carboxylic acids found in tree resins. Nearly all resin acids have the same basic skeleton: three fused rings having the empirical formula C 19 H 29 COOH. Resin acids occur in nature as tacky, yellowish gums consisting of several compounds. They are water-insoluble. A common resin acid is abietic acid ...
Rosin is brittle and friable, with a faint pine odor. It is typically a glassy solid, though some rosins will crystallize, especially when brought into solution. [6] The practical melting point is variable, some being semi-fluid at the temperature of boiling water, others melting at 100 to 120 °C (212 to 248 °F).
Pimaric acid is a carboxylic acid that is classified as a resin acid. It is a major component of the rosin obtained from pine trees. [1] [2] When heated above 100 °C, pimaric acid converts to abietic acid, which it usually accompanies in mixtures like rosin. It is soluble in alcohols, acetone, and ethers. The compound is colorless, but almost ...
Related to the terpenes, resin acid is oxidized terpenes. Resin acids dissolve in alkalis to form resin soaps, from which the resin acids are regenerated upon treatment with acids. Examples of resin acids are abietic acid (sylvic acid), C 20 H 30 O 2, plicatic acid contained in cedar, and pimaric acid, C 20 H 30 O 2, a constituent of galipot ...
Levopimaric acid is an abietane-type of diterpene resin acid. [1] It is a major constituent of pine oleoresin with the chemical formula of C 20 H 30 O 2.In general, the abietene types of diterpene resin acid have various biological activities, such as antibacterial, cardiovascular and antioxidant.
Turpentine is also used as a source of raw materials in the synthesis of fragrant chemical compounds. Commercially used camphor, linalool, alpha-terpineol, and geraniol are all usually produced from alpha-pinene and beta-pinene, which are two of the chief chemical components of turpentine. These pinenes are separated and purified by distillation.
The composition of crude tall oil varies a great deal, depending on the type of wood used. A common quality measure for tall oil is acid number.With pure pines it is possible to have acid numbers in the range 160–165, while mills using a mix of softwoods and hardwoods might give acid numbers in the range of 125–135.
Abietic acid is found in rosin obtained from pine trees. [2] Pure abietic acid is a colorless solid, but commercial samples are usually a glassy or partly crystalline yellowish solid that melts at temperatures as low as 85 °C (185 °F). [3] Abietic acid is soluble in alcohols, acetone, and ethers.