Cobalt nitrate Property

Melting point:

decomposes at 100–105℃ [MER06]

Boiling point:

2900 °C(lit.)

Density 

1.03 g/mL at 25 °C

vapor pressure 

0Pa at 20℃

Flash point:

4°C (Toluene)

solubility 

H₂O: soluble

form 

wire

color 

pale

Water Solubility 

g/100g solution H2O: 45.66 (0°), 50.5 ± 0.2 (25°C), 77.21 (91°C); solid phase, Co(NO3)2 ·6H2O (0°C, 25°C), Co(NO3)2 · 3H2O (91°C) [KRU93]

Merck 

13,2469

CAS DataBase Reference

10141-05-6(CAS DataBase Reference)

EPA Substance Registry System

Cobalt(II) nitrate (10141-05-6)

Safety

Hazard Codes 

T,N,Xn,Xi

Risk Statements 

45-23/24/25-34-51/53-43-40-36/38-52/53-49-60-42/43

Safety Statements 

53-23-26-36/37/39-45-61-36/37-36

RIDADR 

UN 3264 8/PG 3

WGK Germany 

3

RTECS 

GF8750000

HazardClass 

5.1

PackingGroup 

II

HS Code 

28342910

Hazardous Substances Data

10141-05-6(Hazardous Substances Data)

Toxicity

LD in rabbits (mg/kg): 250 orally, 75 s.c. (Venugopal, Luckey)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H317May cause an allergic skin reaction

H334May cause allergy or asthma symptoms or breathing difficulties if inhaled

H341Suspected of causing genetic defects

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P201Obtain special instructions before use.

P202Do not handle until all safety precautions have been read and understood.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P272Contaminated work clothing should not be allowed out of the workplace.

P273Avoid release to the environment.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P281Use personal protective equipment as required.

P285In case of inadequate ventilation wear respiratory protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P341IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.

P308+P313IF exposed or concerned: Get medical advice/attention.

P321Specific treatment (see … on this label).

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P342+P311IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.

P363Wash contaminated clothing before reuse.

P391Collect spillage. Hazardous to the aquatic environment

P405Store locked up.

P501Dispose of contents/container to..…

Cobalt nitrate Chemical Properties,Usage,Production

Uses

Cobalt nitrate is used in the decoration of porcelain and stones; in the manufacture of invisible inks and cobalt pigments; in hair dyes; in animal feeds; as an additive to soils; in catalysts preparation; and in vitamin supplements.

Chemical Properties

Red crystals. Deliquescent in moist air. Soluble in most organic solvents.

Physical properties

The hexahydrate is red monoclinic crystal; deliquescent in moist air; density 1.87 g/cm³; decomposes at 55°C, losing three molecules of water; decomposes to green cobalt(II) oxide on further heating at 74°C; very soluble in water (134 g/100mL at 0°C); also soluble in alcohols and acetone. The anhydrous salt is pale red powder; density 2.49 g/cm³; decomposes around 100°C; soluble in water.

Uses

Sympathetic inks, cobalt pigments, catalysts, additive to soils and animal feeds, vitamin preparations, hair dyes, porcelain decoration.

Uses

Cobalt(II) Dinitrate is mainly reduced to metallic high purity cobalt used for catalysis reactions.

Definition

ChEBI: A cobalt salt in which the cobalt metal is in the +2 oxidation state and the counter-anion is nitrate.

Preparation

Cobalt(II) nitrate is prepared by treating the metal, or its oxide, hydroxide or carbonate with dilute nitric acid. The solution on evaporation yields red crystals of hexahydrate:
Co + 2HNO₃ → Co(NO₃)₂ + H₂
Co(OH)₂+ 2HNO₃ → Co(NO₃)₂ + 2H₂O
CoCO₃+ 2HNO₃→ Co(NO₃)₂ + CO₂ + H₂O.

General Description

Odorless red solid. Sinks and mixes with water.

Air & Water Reactions

Water soluble.

Reactivity Profile

Mixtures of metal/nonmetal nitrates with alkyl esters may explode, owing to the formation of alkyl nitrates; mixtures a nitrate with phosphorus, tin (II) chloride or other reducing agents may react explosively [Bretherick, 1979 p. 108-109].

Hazard

Oxidizing agent, dangerous fire risk in contact with organic materials.

Health Hazard

Inhalation causes shortness of breath and coughing; permanent disability may occur. Ingestion causes pain and vomiting. Contact with eyes or skin causes irritation.

Flammability and Explosibility

Not classified