NTP 10th Report on Carcinogens. IARC Cancer Review: Group 1 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 264.(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) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 11 ,1976,p. 75.(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) . Nickel and its compounds are on the Community Right-To-Know List. Reported in EPA TSCA Inventory.

OSHA PEL: TWA 0.1 mg (Ni)/m³
ACGIH TLV: TWA 0.2 mg(Ni)/m³; Human Carcinogen
NIOSH REL: (Inorganic Nickel) TWA 0.015 mg(Ni)/m³

The Nickel(II) hydroxide is an organic compound with the formula H₂NiO₂. The IUPAC name of this chemical is nickel dihydrate. With the CAS registry number 12054-48-7, it is also named as Nickel(2+) dihydroxide. The product's categories are Inorganics; Metal and Ceramic Science; Nickel Salts; Salts. Besides, it is an apple green powder, which should be stored in cool and ventilated place. It can be used for making nickel salt, alkaline batteries and nickel-plated, and can be used as alkaline batteries, electroplating, catalysts.Its physical properties are:(1)#H bond acceptors:  2; (2)#H bond donors:  2; (3)#Freely Rotating Bonds:  2; (4)mp: 230°C (dec.); (5)density: 4.1g/mL(lit.); (6)Merck: 13,6534.

Preparation of Nickel(II) hydroxide:
This chemical can be prepared by Nickel sulphate and sodium hydroxide. Chemical reaction equation is as follows:

Safety information of Nickel(II) hydroxide:
When you are using Nickel(II) hydroxide, please be cautious about it as the following:It is harmful by inhalation and if swallowed and may cause sensitisation by skin contact. It has limited evidence of a carcinogenic effect. Besides, this chemical Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. When you are using it, wear suitable protective clothing and do not breathe dust. This material and its container must be disposed of as hazardous waste.

You can still convert the following datas into molecular structure:
(1)SMILES:O[Ni]O;
(2)Std. InChI:InChI=1S/Ni.2H2O/h;2*1H2/q+2;;/p-2;
(3)Std. InChIKey:BFDHFSHZJLFAMC-UHFFFAOYSA-L.

The toxicity data of Nickel(II) hydroxide is as follows: