The Nickel acetate tetrahydrate, with the CAS registry number 6018-89-9 and EINECS registry number 206-761-7, has the systematic name of nickel(2+) acetate hydrate (1:2:4). It is a kind of hygroscopic green monoclinic crystal. And the molecular formula of this chemical is C₄H₁₆NiO₈. What's more, it is usually used as chemical reagent, and it is also used as catalyst in the nickelage and coloration of metal and nickelage.

The physical properties of Nickel acetate tetrahydrate are as followings: (1)ACD/LogP: -0.29; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.07; (4)ACD/LogD (pH 7.4): -2.86; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 2.73; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 2; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 37.3 Å²; (13)Flash Point: 40 °C; (14)Enthalpy of Vaporization: 23.7 kJ/mol; (15)Boiling Point: 117.1 °C at 760 mmHg; (16)Vapour Pressure: 13.9 mmHg at 25°C.

Preparation: Dissolve the basic nickel carbonate in excessive dilute acetic acid. Then, after a series of filtration, evaporation, cooling crystallization and drying, you can get product.

You should be cautious while dealing with this chemical. It is harmful if swallowed, and may cause sensitization by skin contact. What's more, it may cause cancer. Therefore, you had better take the following instructions: Do not breathe dust; Avoid contact with skin ; Avoid exposure - obtain special instruction before use; Wear suitable protective clothing and gloves, and in case of accident or if you feel unwell, seek medical advice immediately (show label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: [Ni+2].[O-]C(=O)C.[O-]C(=O)C.O.O.O.O
(2)InChI: InChI=1/2C2H4O2.Ni.4H2O/c2*1-2(3)4;;;;;/h2*1H3,(H,3,4);;4*1H2/q;;+2;;;;/p-2
(3)InChIKey: OINIXPNQKAZCRL-NUQVWONBAQ

The toxicity data is as follows: