| ≥1 piece |
Camphor powder Natural
Camphor is said to have been first used as a drug in the Arabian Peninsula around AD 600, and, eventually came to be used as a sacred panacea in Greece and Egypt.
In those days, camphor was obtained only from camphor wood (this product is known as natural camphor). In the 1920's, however, a mass-production synthesis method was developed in which camphor is obtained from rosin-derived turpentine oil. Currently, virtually all camphor is produced by this synthesis process.
Therefore, camphor is categorized into natural camphor and synthetic camphor.
| Natural camphor Camphor wood is subjected to a steam distillation process to obtain camphor. |
Synthetic camphor Turpentine oil originating from rosin is synthesized and processed into camphor. |
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Item Index Chemical Name Camphor???2-Camphanone Molecular Formula C 10 H 16 O Chemical Formula Molecular Weight 152.24 Appearance white powder crystals
| Item | Index |
| Appearance | colorless transparent crystals |
| Identification | up to the test |
| Melting point | 174-181 °C |
| Solubility | sample is soluble in water (1/700) or 96% alcohol (1/1) or chloroform (1/0.25) |
| Specific optical rotation | [a]D20-1.5°- +1.5° |
| Purity | 96.0% min. |
| Water content | the solution (1g/10Ml petroleum spirit) is clear during boiling range, 40-60 °C |
| Involatile substance | 0.1% max. |
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