Pine tar
 A bottle containing wood tar.
|
|
| Names | |
|---|---|
| Other names
Pine tar oil, Wood tar oil
|
|
| Identifiers | |
| 8011-48-1 | |
| ECHA InfoCard | 100.029.429 |
| EC Number | 232-374-8 |
| KEGG | D04807 |
| PubChem | 17398176 |
| Properties | |
| Appearance | Blackish-brown viscous liquid |
| Density | 1.01–1.06 |
| Boiling point | 150 to 400 °C (302 to 752 °F; 423 to 673 K) |
| Slightly | |
| Solubility | alc, chloroform, ether, acetone, glacial acetic acid, fixed/volatile oils, solutions of caustic alkalies |
| Pharmacology | |
| Topical | |
| Hazards | |
| R-phrases | R43 |
| S-phrases | (S2) S24 S28 S37 S46 |
| NFPA 704 | |
| Flash point | 90 °C (194 °F; 363 K) |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
|
| Infobox references | |
Pine tar is a sticky material produced by the high temperature carbonization of pine wood in anoxic conditions (dry distillation or destructive distillation). The wood is rapidly decomposed by applying heat and pressure in a closed container; the primary resulting products are charcoal and pine tar.
Pine tar consists primarily of aromatic hydrocarbons, tar acids and tar bases. Components of tar vary according to the pyrolytic process (e.g. method, duration, temperature) and origin of the wood (e.g. age of pine trees, type of soil and moisture conditions during tree growth). The choice of wood, design of kiln, burning and collection of the tar can vary. Only pine stumps and roots are used in the traditional production of pine tar.
Pine tar has a long history as a wood preservative, as a wood sealant for maritime use, in roofing construction and maintenance, in soaps and in the treatment of carbuncles and skin diseases, such as psoriasis, eczema, and rosacea.
Pine tar has long been used in Scandinavian nations as a preservative for wood which may be exposed to harsh conditions, including outdoor furniture and ship decking and rigging. The high-grade pine tar used in this application is often called Stockholm Tar since, for many years, a single company held a royal monopoly on its export out of . It is also known as "Archangel Tar". Tar and pitch for maritime use was in such demand that it became an important export for the American colonies (later United States), such as North Carolina, which had extensive pine forests. North Carolinians later became known as "Tar Heels."
...
Wikipedia