Physicochemical Properties
| Molecular Formula | C1513CH32O2 | 
| Molecular Weight | 257.42 | 
| Exact Mass | 257.244 | 
| CAS # | 57677-53-9 | 
| Related CAS # | Palmitic acid;57-10-3;Palmitic acid sodium;408-35-5;Palmitic acid-1,2,3,4-13C4;287100-89-4 | 
| PubChem CID | 9881577 | 
| Appearance | White to off-white solid powder | 
| Density | 0.855 g/mL at 25ºC | 
| Boiling Point | 271.5ºC100 mm Hg(lit.) | 
| Melting Point | 61-64ºC(lit.) | 
| Index of Refraction | 1.454 | 
| LogP | 5.552 | 
| Hydrogen Bond Donor Count | 1 | 
| Hydrogen Bond Acceptor Count | 2 | 
| Rotatable Bond Count | 14 | 
| Heavy Atom Count | 18 | 
| Complexity | 178 | 
| Defined Atom Stereocenter Count | 0 | 
| SMILES | CCCCCCCCCCCCCCC[13C](=O)O  | 
                            
| InChi Key | IPCSVZSSVZVIGE-LOYIAQTISA-N | 
| InChi Code | InChI=1S/C16H32O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16(17)18/h2-15H2,1H3,(H,17,18)/i16+1 | 
| Chemical Name | (113C)hexadecanoic acid | 
| 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
| References | 
                                    
                                         [1]. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216. [2]. Antitumor activity of palmitic acid found as a selective cytotoxic substance in a marine red alga. Anticancer Res. 2002 Sep-Oct;22(5):2587-90.  | 
                            
Solubility Data
| Solubility (In Vitro) | DMSO : 66.67 mg/mL (258.99 mM) | 
| Solubility (In Vivo) | 
                                    Solubility in Formulation 1:  ≥ 2.5 mg/mL (9.71 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 | 3.8847 mL | 19.4235 mL | 38.8470 mL | |
| 5 mM | 0.7769 mL | 3.8847 mL | 7.7694 mL | |
| 10 mM | 0.3885 mL | 1.9424 mL | 3.8847 mL |