| TEST | SPECIFICTIONS |
| Description | Colorless or light yellow oil |
| Identification | IR of the sample should match with standard |
| RT of sample should match with standard in the Related substances | |
| Water content | ≤2.0% |
| Residue on ignition | ≤0.5% |
| Isopropyl diphenyl- phosphorylpentanoate | ≤0.1% |
| Related Compound B (15S-cis isomer) | ≤0.5% |
| Related Compound A (15S-trans isomer) | ≤3.5% |
| Related Compound E (Latanoprost acid) | ≤0.2% |
| Other max single impurity | ≤0.1% |
| Total other impurities | ≤0.5% |
| Residue solvents | Acetone≤0.5% |
| Methanol≤0.3% | |
| Toluene≤0.089% | |
| Tetrahydrofuran≤0.072% | |
| Ethyl acetate≤0.5% | |
| Dichloromethane≤0.06% | |
| Assay | 94.0%~102.0% |
| Conclusion: | Complies with USP40 standards. |