The IUPAC name of Triethylene glycol is 2-[2-(2-hydroxyethoxy)ethoxy]ethanol. With the CAS registry number 112-27-6, it is also named as 2,2'-(1,2-Ethanediylbis(oxy))bisethanol. The product's categories are ethylene glycol; ethylene glycols; ethylene glycols & monofunctional ethylene glycols. It is colorless, odorless, viscous and hygroscopic liquid which is miscible with water and ethanol, slightly soluble in ether, almost insoluble in petroleum ether. It is slightly toxic and combustible. Additionally, Triethylene glycol is non-corrosive to metal and do not react with the majority plastic and rubber. When not use, it should sealed in the container which must placed in the cool and dry aera.

The other characteristics of Triethylene glycol can be summarized as: 
(1)ACD/BCF (pH 5.5): 1; (2)ACD/BCF (pH 7.4): 1; (3)ACD/KOC (pH 5.5): 2.29; (4)ACD/KOC (pH 7.4): 2.29; (5)#H bond acceptors: 4; (6)#H bond donors: 2; (7)#Freely Rotating Bonds: 9; (8)Index of Refraction: 1.45; (9)Molar Refractivity: 36.4 cm³; (10)Molar Volume: 135.3 cm³; (11)Polarizability: 14.43×10^-24 cm³; (12)Surface Tension: 41.6 dyne/cm; (13)Enthalpy of Vaporization: 61.18 kJ/mol; (14)Vapour Pressure: 0.000268 mmHg at 25 °C; (15)Rotatable Bond Count: 7; (16)Exact Mass: 150.089209; (17)MonoIsotopic Mass: 150.089209; (18)Topological Polar Surface Area: 58.9; (19)Heavy Atom Count: 10.

Preparation of Triethylene glycol: 
It is obtained, with diethylene glycol, as a by-product in the manufacture of ethylene glycol from hydrolysis of ethylene oxide.
6CH₂CH₂O + 3H₂O → HOCH₂CH₂OH + HOCH₂CH₂OCH₂CH₂OH + HOCH₂CH₂OCH₂CH₂OCH₂CH₂OH
It is separated from the ethylene glycol and diethylene glycol by vacuum distillation.

Uses of Triethylene glycol:
It is not only used as a plasticizer for vinyl, but also used in Air-Sanitizer products. When aerosolized, it acts as a disinfectant. Additionally, Triethylene glycol is also used as liquid desiccants for natural gas and in air conditioning systems. Furthermore, it is an additive for hydraulic fluids and brake fluids and used as a base for "smoke machine" fluid in the entertainment industry. 

Safety information of Triethylene glycol:
When you are using Triethylene glycol, please be cautious about it as the following:It is irritating to eyes, respiratory system and skin. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing.

People can use the following data to convert to the molecule structure. 
(1)Canonical SMILES: C(COCCOCCO)O
(2)InChI: InChI=1S/C6H14O4/c7-1-3-9-5-6-10-4-2-8/h7-8H,1-6H2
(3)InChIKey: ZIBGPFATKBEMQZ-UHFFFAOYSA-N

The following are the toxicity data of Triethylene glycol: