Patent ID: 7563935

Claim:
A mixture consisting essentially of crystal forms of astaxanthin comprising: a) Crystal Form I having an X-ray diffraction pattern comprising the following interlattice plane interval d in 10 −10 m: 8.0±0.1, 6.5±0.05, 6.3±0.05, 6.1±0.05, 5.96±0.05, 5.58±0.05, 5.43±0.05, 4.87±0.05, 4.32±0.05, 4.24±0.05, 4.21±0.05, 4.07±0.05, 4.03±0.05, 3.58±0.05, 3.50±0.05, and b) Crystal Form II having an X-ray diffraction pattern comprising the following interlattice plane interval d in 10 −10 m: 7.2±0.1, 6.6±0.05, 6.5±0.05, 5.48±0.05, 5.34±0.05, 5.27±0.05, 4.49±0.05, 4.38±0.05, 4.12±0.05, 3.89±0.05, 3.61±0.05, 3.56±0.05, 3.34±0.05, 3.32±0.05, 3.22±0.05.