The 1-(2-Hydroxyethyl)piperazine with CAS registry number of 103-76-4 is also known as (b-Hydroxyethyl)piperazine. The IUPAC name is 2-Piperazin-1-ylethanol. It belongs to product categories of Piperaizine. Its EINECS registry number is 203-142-3. In addition, the formula is C₆H₁₄N₂O and the molecular weight is 130.19. This chemical is a clear colorless to pale yellow oily liquid that miscible with water. It may cause inflammation to the skin or other mucous membranes and should be sealed in ventilated, cool, dry place away from fire, heat, oxidants. What's more, this chemical is used as for organic synthesis.

Physical properties about 1-(2-Hydroxyethyl)piperazine are: (1)ACD/LogP: -0.45; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -3.43; (4)ACD/LogD (pH 7.4): -2.15; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 3; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 3; (12)Polar Surface Area: 15.71; (13)Index of Refraction: 1.475; (14)Molar Refractivity: 36.22 cm³; (15)Molar Volume: 128.6 cm³; (16)Polarizability: 14.35×10^-24 cm³; (17)Surface Tension: 34.7 dyne/cm; (18)Density: 1.012 g/cm³; (19)Flash Point: 101.9 °C; (20)Enthalpy of Vaporization: 56.01 kJ/mol; (21)Boiling Point: 245 °C at 760 mmHg; (22)Vapour Pressure: 0.00492 mmHg at 25°C; (23)Exact Mass: 130.110613; (24)MonoIsotopic Mass: 130.110613; (25)Topological Polar Surface Area: 35.5; (26)Heavy Atom Count: 9; (27)Complexity: 71.5; (28)Covalently-Bonded Unit Count: 1.

Preparation of 1-(2-Hydroxyethyl)piperazine: it is prepared by reaction of piperazine hexahydrate with ethylene oxide. Firstly, piperazine hexahydrate is dissolved in water, stirred and cooled to 15-20 °C. Then ethylene oxide is passed into solution and reaction occurs at the temperature of 30-35 °C for 2 hours under stirring. At last, product is obtained by cooling, filtration, vacuum distillation and collecting distillate at 145-155 °C (5.33kPa).

Use of 1-(2-Hydroxyethyl)piperazine: it is used to produce (2,3-dihydro-benzo[1,4]dioxin-2-yl)-[4-(2-hydroxy-ethyl)-piperazin-1-yl]-methanone by reaction with 2,3-dihydro-benzo[1,4]dioxine-2-carboxylic acid ethyl ester. This reaction occurs at the temperature of 110 °C for 3 hours. The yield is about 98%.

When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system, skin and may have risk of serious damage to eyes. Therefore, you should wear suitable protective clothing, gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 

You can still convert the following datas into molecular structure:
1. Canonical SMILES: C1CN(CCN1)CCO
2. InChI: InChI=1S/C6H14N2O/c9-6-5-8-3-1-7-2-4-8/h7,9H,1-6H2
3. InChIKey: WFCSWCVEJLETKA-UHFFFAOYSA-N 

The toxicity data is as follows: