CAS number： 84-80-0
Molecular formula： C31H46O2
molecular weight： 450.6957
Chemical structure：
| Product Name | Vitamin K1 | |
| Shelf Life | 2 years | |
| Item | Test | Result |
| Appearance | A clear, intense yellow, viscous, oily liquid, practically insoluble in water, sparingly soluble in alcohol, miscible with fatty oils. | conform |
| Identification | ||
| Refractive index | 1.523-1.526 | 1.525 |
| UV spectrum | Test solution and std solution exhibit maxima at the same wavelength and absorptivity at 248nm is within 3.0% | conform |
| Infrared spectrum | Conformance with standard spectrum | conform |
| Reaction 1 | A 1 in 20solution of it in dehydrated Alcohol is neutral to litmus. | conform |
| Reaction 2 | Test the limit of menadione | conform |
| Assay (Z and E isomers) | 97.0% to 103.0% | 98.31% |
| Assay (z isomer) | ≤21.0% | 16.69% |
| Conclusion: The product comply with USP35. | ||
