IARC Cancer Review: Group 2B IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 52 , 1991,p. 363.(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) ; Human Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 52 , 1991,p. 363.(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) .

NIOSH REL: (cobalt metal, dust and fume) TWA 0.05 mg/m³

The Cobaltous nitrate hexahydrate with CAS registry number of 10026-22-9 is also known as Cobalt dinitrate hexahydrate. The IUPAC name is Cobalt(2+) dinitrate hexahydrate. Its EINECS registry number is 233-402-1. In addition, the formula is Co^.(NO₃)₂^.6(H₂O) and the molecular weight is 291.07. This chemical is red-brown deliquescent salt that is soluble in water and other polar solvents. It should be sealed in ventilated and dry place without light at room temperature. What's more, this chemical is used as desulfurization catalyst, cobalt pigment, paint drying, vitamin B12 additives, invisible ink, tube shell ceramic coloring agents and so on.

Physical properties about Cobaltous nitrate hexahydrate are: (1)ACD/LogP: -0.13; (2)ACD/LogD (pH 5.5): -0.13; (3)ACD/LogD (pH 7.4): -0.13; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)#H bond acceptors: 4; (7)#H bond donors: 1; (8)Enthalpy of Vaporization: 37.72 kJ/mol; (9)Boiling Point: 83 °C at 760 mmHg; (10)Vapour Pressure: 49.8 mmHg at 25 °C.

Preparation of Cobaltous nitrate hexahydrate. Firstly, nitric acid with density of 1.40 is slowly added to the reagent cobalt hydroxide until solution is weakly acidic. Then the reaction solution is heated to 70-80 °C and stirred. Meanwhile, adding small amount of 30% hydrogen peroxide. At last, product is obtained by filtration, crystallization and suction.

Co(OH)₂ + 2HNO₃ = Co(NO₃)₂ + 2 H₂O

When you are using this chemical, please be cautious about it. As a chemical, it is harmful if swallowed and may cause sensitisation by inhalation and skin contact through there is limited evidence of a carcinogenic effect. It is very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. When contacting with combustible material, it may cause fire. During using it, wear suitable protective clothing, gloves and eye/face protection. Do not breathe dust and avoid release to the environment. If contact with eyes accidently, rinse immediately with plenty of water and seek medical advice. In case of accident or if you feel unwell seek medical advice immediately. After using it, this material and its container must be disposed of as hazardous waste. Furthermore, keep away from combustible material.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: [N+](=O)([O-])[O-].[N+](=O)([O-])[O-].O.O.O.O.O.O.[Co+2]
2. InChI: InChI=1S/Co.2NO3.6H2O/c;2*2-1(3)4;;;;;;/h;;;6*1H2/q+2;2*-1;;;;;;
3. InChIKey: QGUAJWGNOXCYJF-UHFFFAOYSA-N

The toxicity data is as follows: