Sofosbuvir impurity A is a diastereomer of Sofosbuvir and an impurity of Sofosbuvir. Sofosbuvir (PSI-7977) is an inhibitor (blocker/antagonist) of HCV (hepatitis C virus) RNA replication and displays potent activity against hepatitis C virus.

Physicochemical Properties

Molecular Formula	C22H29FN3O9P
Molecular Weight	529.452530622482
Exact Mass	529.162
CAS #	1496552-16-9
Related CAS #	Sofosbuvir;1190307-88-0;PSI-7976;1190308-01-0;Sofosbuvir-d6;1868135-06-1;Sofosbuvir-13C,d3
PubChem CID	73425559
Appearance	White to yellow solid powder
Density	1.4±0.1 g/cm3
Index of Refraction	1.573
LogP	1.62
Hydrogen Bond Donor Count	3
Hydrogen Bond Acceptor Count	11
Rotatable Bond Count	11
Heavy Atom Count	36
Complexity	913
Defined Atom Stereocenter Count	6
SMILES	P(N[C@@H](C(=O)OC(C)C)C)(=O)(OC1C=CC=CC=1)OC[C@@H]1[C@H]([C@](C)([C@H](N2C=CC(NC2=O)=O)O1)F)O
InChi Key	TTZHDVOVKQGIBA-KHFYHRBSSA-N
InChi Code	InChI=1S/C22H29FN3O9P/c1-13(2)33-19(29)14(3)25-36(31,35-15-8-6-5-7-9-15)32-12-16-18(28)22(4,23)20(34-16)26-11-10-17(27)24-21(26)30/h5-11,13-14,16,18,20,28H,12H2,1-4H3,(H,25,31)(H,24,27,30)/t14-,16-,18-,20-,22-,36-/m1/s1
Chemical Name	propan-2-yl (2R)-2-[[[(2R,3R,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-4-fluoro-3-hydroxy-4-methyloxolan-2-yl]methoxy-phenoxyphosphoryl]amino]propanoate
HS Tariff Code	2934.99.9001
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)

Biological Activity

Solubility Data

Solubility (In Vitro)

DMSO : ~100 mg/mL (~188.88 mM)

Solubility (In Vivo)

Solubility in Formulation 1: ≥ 2.5 mg/mL (4.72 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 25.0 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: ≥ 2.5 mg/mL (4.72 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in 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 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Solubility in Formulation 3: ≥ 2.5 mg/mL (4.72 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 25.0 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	1.8888 mL	9.4438 mL	18.8875 mL
	5 mM	0.3778 mL	1.8888 mL	3.7775 mL
	10 mM	0.1889 mL	0.9444 mL	1.8888 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.