(info2 at virginforestplant dot com)
Character: It is almost no color to tiny yellow green volatility oil, with special perfume of fennel oil.
Specific Gravity: 0.953 ~ 0.973
Refraction: 1.532 ~ 1.543
Optical Rotation: +12°~ +24°
Freezing Point: 5 ~ 15°C
Content: upon 60% anethole
The package: Aluminum bottle packing, 2.5kg/bottle, 5kg/bottle, 10kg/bottle.
http://www.chuguo.cn/common/timetabe.htm