The 3-Ethynylpyridine, with the cas registry number 2510-23-8, is also called pyridine, 3-ethynyl-. And its product categories are various, including pharmacetical; Acetylenes; Functionalized Acetylenes; Highly Purified Reagents; Other Categories; Refined Products by Sublimation; Pyridine; C7 and C8; Heterocyclic Building Blocks; Pyridines. The molecular formula of the chemical is C₇H₅N.

The characteristics of this chemical are as followings: (1)ACD/LogP: 0.91; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.9; (4)ACD/LogD (pH 7.4): 0.91; (5)ACD/BCF (pH 5.5): 2.84; (6)ACD/BCF (pH 7.4): 2.88; (7)ACD/KOC (pH 5.5): 73.09; (8)ACD/KOC (pH 7.4): 74.26; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 12.89 Å²; (13)Index of Refraction: 1.542; (14)Molar Refractivity: 31.61 cm³; (15)Molar Volume: 100.3 cm³; (16)Polarizability: 12.53 ×10^-24cm³; (17)Surface Tension: 44.2 dyne/cm; (18)Density: 1.02 g/cm³; (19)Flash Point: 57.5 °C; (20)Enthalpy of Vaporization: 39.02 kJ/mol; (21)Boiling Point: 170.5 °C at 760 mmHg; (22)Vapour Pressure: 1.94 mmHg at 25°C.

You should be cautious while dealing with this chemical. It irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Keep away from sources of ignition and  do not smoking; Wear suitable protective clothing, gloves and eye/face protection, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: C#Cc1cccnc1
(2)InChI: InChI=1/C7H5N/c1-2-7-4-3-5-8-6-7/h1,3-6H
(3)InChIKey: CLRPXACRDTXENY-UHFFFAOYAM