The CAS register number of N-octadecylphosphonic acid is 4724-47-4. It also can be called as 1-Octadecanephosphonic acid and the IUPAC name about this chemical is octadecylphosphonic acid. The molecular formula about this chemical is C₁₈H₃₉O₃P and the molecular weight is 334.47. It belongs to the following product category which includes API intermediates. This chemical is stable under normal temperature and pressure. It is stable and incompatible with strong oxidizing agents. If you want to store it, you should keep the container tightly sealed in dry, cool places.

Physical properties about N-octadecylphosphonic acid are: (1)ACD/LogP: 7.01; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 4.07; (4)ACD/LogD (pH 7.4): 3.45; (5)ACD/BCF (pH 5.5): 143.54; (6)ACD/BCF (pH 7.4): 34.79; (7)ACD/KOC (pH 5.5): 177.39; (8)ACD/KOC (pH 7.4): 42.99; (9)#H bond acceptors: 3; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 17; (12)Polar Surface Area: 45.34 Å²; (13)Index of Refraction: 1.465; (14)Molar Refractivity: 95.38 cm³; (15)Molar Volume: 344.8 cm³; (16)Polarizability: 37.81x10^-24cm³; (17)Surface Tension: 37.5 dyne/cm; (18)Density: 0.969 g/cm³; (19)Flash Point: 234.2 °C; (20)Enthalpy of Vaporization: 79.43 kJ/mol; (21)Boiling Point: 463.6 °C at 760 mmHg; (22)Vapour Pressure: 7.02E-10 mmHg at 25 °C.

Preparation: this chemical can be prepared by 1-bromo-octadecane. This reaction will need reagent of H₃PO₄, BSTFA, H₂O and solvent of methanol. This reaction needs two steps. The reaction time is 2 hours with reaction temperature of 120 °C and 20 °C. The yield is about 99%.

You can still convert the following datas into molecular structure:
(1)SMILES: O=P(O)(O)CCCCCCCCCCCCCCCCCC
(2)InChI: InChI=1/C18H39O3P/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3,(H2,19,20,21)
(3)InChIKey: FTMKAMVLFVRZQX-UHFFFAOYAI
(4)Std. InChI: InChI=1S/C18H39O3P/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-22(19,20)21/h2-18H2,1H3,(H2,19,20,21)
(5)Std. InChIKey: FTMKAMVLFVRZQX-UHFFFAOYSA-N