NTP 10th Report on Carcinogens. IARC Cancer Review: Animal Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 49 ,1990,p. 257.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

ACGIH TLV: TWA 0.1 mg(Ni)/m³; Not Classifiable as a Carcinogen

The Nickel ammonium sulfate hexahydrate, also known as Sulfuric acid, ammonium nickel(2+) salt (2:2:1), hexahydrate, is an organic compound with the formula H₂₀N₂NiO₁₄S₂. Its EINECS registry number is 239-793-5. With the CAS registry number 7785-20-8, its IUPAC name is azane; hydrogen sulfate; nickel(2+); hexahydrate. This chemical's classification code is Tumor Data. What's more, it can be used as analytics reagents and in electroplating industry.

Physical properties of Nickel ammonium sulfate hexahydrate: (1)ACD/LogP: -1.03; (2)ACD/LogD (pH 5.5): -5.53; (3)ACD/LogD (pH 7.4): -5.53; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)#H bond acceptors: 4; (7)#H bond donors: 2; (8)Enthalpy of Vaporization: 62.94 kJ/mol; (9)Boiling Point: 330 °C at 760 mmHg; (10)Vapour Pressure: 3.35E-05 mmHg at 25°C.

Preparation: nickel sulfate is mixed with water and is acidized by sulfuric acid and miscible with ammonium sulfate saturated solution. The reaction mixture is cooled down. Then Nickel ammonium sulfate crystallization will precipitate. The product
is eluted with a mixture of H₂O and ethanol and is dried. At last, it will generate Nickel ammonium sulfate.

When you are using this chemical, please be cautious about it as the following:
This chemical that at low levels can cause damage to health. It is harmful if swallowed. In addition, it may cause sensitisation by inhalation and skin contact and may cause cancer. Whenever you will contact it, please wear suitable protective clothing and gloves. In case of accident or if you feel unwell seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: N.N.O.O.O.O.O.O.OS(=O)(=O)[O-].OS(=O)(=O)[O-].[Ni+2]
(2)InChI: InChI=1S/2H3N.Ni.2H2O4S.6H2O/c;;;2*1-5(2,3)4;;;;;;/h2*1H3;;2*(H2,1,2,3,4);6*1H2/q;;+2;;;;;;;;/p-2
(3)InChIKey: ZZPAXHDZFDUTLY-UHFFFAOYSA-L

The toxicity data is as follows: