Size | Price | Stock | Qty |
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5mg |
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10mg |
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25mg |
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50mg |
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100mg |
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Other Sizes |
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ent-Tadalafil (ent-IC-351) is a cis-enantiomer and an impurity of Tadalafil, which is an inhibitor of PDE5/phosphodiesterase 5 approved as an oral drug for treating erectile dysfunction (ED).
Molecular Formula |
C??H??N?O?
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Molecular Weight |
389.40
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Exact Mass |
389.138
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CAS # |
629652-72-8
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Related CAS # |
Nortadalafil;171596-36-4;Tadalafil;171596-29-5;cis-Tadalafil;171596-27-3;cis-ent-Tadalafil;171596-28-4
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Appearance |
Solid powder
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Density |
1.51±0.1 g/cm3 (20 ºC 760 Torr)
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Melting Point |
302-304 ºC
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LogP |
2.087
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Synonyms |
ent-IC-351 ent-IC351 ent-Tadalafil ent Tadalafil
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HS Tariff Code |
2934.99.9001
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Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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Solubility (In Vitro) |
DMSO : ~250 mg/mL (~642.01 mM)
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Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.08 mg/mL (5.34 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: ≥ 2.08 mg/mL (5.34 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.) |
Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
1 mM | 2.5681 mL | 12.8403 mL | 25.6805 mL | |
5 mM | 0.5136 mL | 2.5681 mL | 5.1361 mL | |
10 mM | 0.2568 mL | 1.2840 mL | 2.5681 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration: mg/mL;
Method for preparing DMSO stock solution: mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation::Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.