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203890

Sigma-Aldrich

Nickel(II) sulfate heptahydrate

99.999% trace metals basis

Synonym(s):

Nickel sulfate heptahydrate, Nickelous sulfate heptahydrate

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About This Item

Linear Formula:
NiSO4 · 7H2O
CAS Number:
Molecular Weight:
280.86
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.23

Assay

99.999% trace metals basis

form

crystals and lumps

impurities

≤15.0 ppm Trace Metal Analysis

density

1.948 g/mL at 25 °C (lit.)

application(s)

battery manufacturing

SMILES string

[Ni++].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[H]O[H].[O-]S([O-])(=O)=O

InChI

1S/Ni.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2

InChI key

OGKAGKFVPCOHQW-UHFFFAOYSA-L

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General description

Nickel(II) sulfate heptahydrate, a water-soluble solid, is widely utilized in diverse industrial applications such as electrochemistry, catalysis, electronics, and optoelectronics. Its electrochemical properties make it a valuable component in the synthesis of electrode materials, which are employed in batteries, supercapacitors, and fuel cells.

Application

Nickel(II) sulfate heptahydrate can be used in the research and development: 
  • As a vital precursor to generate nickel-rich cathode materials (NMC, NCA) for lithium-ion batteries using co-precipitation process because of its simplicity, ease of scale-up, and ability to produce a homogeneous structure at the particle scale.      
  • As a nickel source in the electrodeposition process to fabricate the Ni-NTNW (nickel nanotube network), which is then coated with the electroactive NiCo-LDH material to form the hierarchical supercapacitor electrode.  
  • As a precursor to synthesize the nickel(II) cinnamate complex, which is a key component in the preparation of the metal chelate monomers.
  • To synthesize a highly efficient oxygen evolution reaction (OER) trimetallic Fe-Co-Ni electrocatalyst with other metal sulfates .
  • To synthesize high entropy alloy for coatings to improve hardness, wear resistance and corrosion resistance.

Features and Benefits

  • High purity with trace metal analysis (=< 15 ppm) for 32 elements, suitable for batteries.   
  • High water solubility ideal for synthesizing composites for various applications.
  • Low ppm levels of metal ions including Al, K, Na, Mg, Cu, Co, etc.,7)      99.999% purity is ideal for nickel plating.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A Inhalation - Muta. 2 - Repr. 1B - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT RE 1 Inhalation

Target Organs

respiratory tract irritation

Storage Class Code

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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