The Benzoic acid,4-propoxy-, with the CAS registry number 5438-19-7, has the systmatic name of 4-propoxybenzoic acid. And the molecular formula of this chemical is C₁₀H₁₂O₃. It is a kind of white to light yellow crystal powder, and belongs to the following product categories: Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts; Benzoic acid; Organic acids; Acids & Esters; Anisoles, Alkyloxy Compounds & Phenylacetates; Benzoic Acids (Building Blocks for Liquid Crystals); Building Blocks for Liquid Crystals; Functional Materials; Building blockCarbonyl Compounds; C10; Carboxylic Acids; Liquid Crystals; Organic Electronics and Photonics. What's more, it is used as the intermediates of liquid crystals.

The physical properties of Benzoic acid,4-propoxy- are as following: (1)ACD/LogP: 3.02; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.97; (4)ACD/LogD (pH 7.4): 0.31; (5)ACD/BCF (pH 5.5): 10.35; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 93.1; (8)ACD/KOC (pH 7.4): 2.02; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 35.53 Å²; (13)Index of Refraction: 1.53; (14)Molar Refractivity: 49.12 cm³; (15)Molar Volume: 158.9 cm³; (16)Polarizability: 19.47×10^-24cm³; (17)Surface Tension: 42.3 dyne/cm; (18)Density: 1.133 g/cm³; (19)Flash Point: 119.3 °C; (20)Enthalpy of Vaporization: 57.58 kJ/mol; (21)Boiling Point: 304.9 °C at 760 mmHg; (22)Vapour Pressure: 0.000372 mmHg at 25°C.

Preparation of Benzoic acid,4-propoxy-: This chemical can be prepared by 4-allyloxy-benzoic acid, and the other product is 4-hydroxy-benzoic acid. The reaction will need reagent KOH, and the solvent methanol. The reaction time is 10 hours with temperature of 20°C, and the yield is about 82%. 

You should be cautious while dealing with this chemical. It irritates eyes, respiratory system and skin. Therefore, you had better take avoid contact with skin and eyes.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(O)c1ccc(OCCC)cc1
(2)InChI: InChI=1/C10H12O3/c1-2-7-13-9-5-3-8(4-6-9)10(11)12/h3-6H,2,7H2,1H3,(H,11,12)
(3)InChIKey: GDFUWFOCYZZGQU-UHFFFAOYAE