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Chemical structure of Nickel (II) acetate | 6018-89-9
CAS: 6018-89-9
SKU: S2862
Nickel (II) acetate | SKU: S2862
Synonyms: Acetic acid, nickel(II) salt
Chemical structure of Nickel (II) acetate | 6018-89-9
Nickel(II) acetate tetrahydrate is a green, crystalline nickel salt that dissolves readily in water and other polar solvents, making it a convenient soluble source of divalent nickel for solution-based chemistry. Its ionic structure and controlled hydration allow it to decompose cleanly into nickel oxide or nickel hydroxide phases under thermal or hydrothermal conditions, which is why it is widely chosen as a molecular precursor. Sarchem Labs manufactures and packages this compound to defined purity and physical specifications, with each lot supported by a Certificate of Analysis and Safety Data Sheet. It is primarily supplied into research and industrial settings developing nickel oxide/hydroxide nanostructures, nickel-based thin films, and coordination chemistry. Because this material carries a significant GHS hazard profile, it should be handled only by trained personnel following the precautions below.
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Specifications

Melting Point250°C
Density1.744 g/mL (existing Sarchem spec — Sigma's reference gives 1.798 g/mL, see flag above)
ColorGreen
PackagingGlass Bottle
Linear FormulaNi(C₂H₃O₂)₂·4H₂O
Formula Weight248.84 g/mol
Physical FormSolid, powder
Chemical Name or MaterialNickel(II) Acetate Tetrahydrate
Molecular FormulaNi(OCOCH₃)₂ · 4H₂O
SMILES String`[H]O[H].[H]O[H].[H]O[H].[H]O[H].CC(=O)O[Ni]OC(C)=O`
IdentificationPass Test
GradeCertified
Beilstein3730764
Iron (Fe)0.005% max.
Sulfate0.005% max.
Assay98%
Calcium (Ca)0.01% max.
Chloride0.003% max.
Cobalt (Co)0.5% max.
Insoluble Matter0.005% max.
Lead (Pb)0.005% max.
Nitrate0.008% max.
Potassium (K)0.02% max.
Sodium (Na)0.1% max.
Zinc (Zn)0.02% max.
CAS Number6018-89-9
Storage TemperatureStore at room temperature in a tightly closed container (general guidance; confirm exact range against SDS)
EC Number206-761-7
NACRESNA.23
PubChem Substance ID24854649
UNSPSC Code12352103
MDL NumberMFCD00066973
Quality Segment200
InChI`1S/2C2H4O2.Ni.4H2O/c2*1-2(3)4;;;;;/h2*1H3,(H,3,4);;4*1H2/q;;+2;;;;/p-2`
InChI KeyOINIXPNQKAZCRL-UHFFFAOYSA-L
Reaction SuitabilityCore: nickel; Reagent type: catalyst

Applications

Serves as the nickel source in hydrothermal routes to nanostructured nickel diselenide (NiSe₂)
Starting material for salamo-based dinuclear nickel(II) coordination complexes
Sol-gel precursor for nickel oxide (NiO), used downstream in electrochromic devices, gas sensors, and lithium-ion battery electrodes
Building block for polynuclear nickel–polyoxotungstate cluster compounds studied as molecular magnets
Precursor for nickel oxide/hydroxide nanostructures used in supercapacitor and battery electrode research
Nickel source for chemical vapor deposition (CVD) and atomic layer deposition (ALD) of nickel-based thin films

Product Description

What is Nickel(II) Acetate Tetrahydrate?

Nickel(II) acetate tetrahydrate is the hydrated form of nickel acetate, in which each nickel(II) ion is paired with two acetate ligands and four water molecules of crystallization, giving the formula Ni(OCOCH₃)₂·4H₂O and a formula weight of 248.84 g/mol. The compound presents as a green solid that is readily soluble in water and compatible with a range of polar organic solvents. Because the nickel center in this salt is coordinated by relatively labile acetate and aquo ligands, the compound can be converted into other nickel species under comparatively mild thermal, hydrothermal, or reducing conditions, which is why it is valued as a reagent rather than a finished material.

Sarchem Labs supplies this material as a certified-grade solid in glass packaging, with lot-specific documentation available to verify identity and purity.

Uses of Nickel(II) Acetate Tetrahydrate

The dominant use is as a molecular precursor rather than a final-use chemical. Dissolved in a compatible solvent, it supplies nickel ions for hydrothermal, sol-gel, and solvothermal routes to nanostructured nickel oxide and nickel hydroxide, materials studied for supercapacitor electrodes, battery components, gas sensors, and electrochromic coatings. The same properties make it suitable as a nickel source in CVD and ALD processes for thin nickel-containing films.

Beyond materials synthesis, it is used in coordination and cluster chemistry, serving as the nickel source for dinuclear salamo-type complexes and polynuclear nickel–polyoxotungstate clusters investigated for molecular magnetism.

Safety Information

This product carries a serious GHS hazard classification and must be handled with strict controls. Nickel(II) acetate tetrahydrate is classified as a Category 1A carcinogen and a Category 1B reproductive toxicant, in addition to multiple other significant hazard categories. This is presented here in full and should not be treated as routine.

Signal Word: Danger

GHS Pictograms: GHS08 (Health Hazard), GHS07 (Exclamation Mark), GHS09 (Environmental Hazard)

GHS Hazard Classifications: Carcinogenicity Cat. 1A, Reproductive Toxicity Cat. 1B, Germ Cell Mutagenicity Cat. 2, STOT-RE Cat. 1, Respiratory Sensitization Cat. 1, Skin Sensitization Cat. 1, Acute Toxicity (Oral) Cat. 4, Acute Toxicity (Inhalation) Cat. 4, Acute Aquatic Toxicity Cat. 1, Chronic Aquatic Toxicity Cat. 1

Hazard Statements:

  •       H302 + H332 — Harmful if swallowed or if inhaled
  •       H317 — May cause an allergic skin reaction
  •       H334 — May cause allergy or asthma symptoms or breathing difficulties if inhaled
  •       H341 — Suspected of causing genetic defects
  •       H350 — May cause cancer
  •       H360D — May damage fertility or the unborn child
  •       H372 — Causes damage to organs through prolonged or repeated exposure
  •       H410 — Very toxic to aquatic life with long lasting effects

Precautionary Statements: P202, P273, P280, P301+P312, P302+P352, P308+P313

Storage Class: 6.1C — Combustible, acutely toxic Category 3 / toxic compounds causing chronic effects

Water Hazard Class (WGK): 3 — Severely hazardous to water

Recommended PPE: Eye shields, face shields, and protective gloves are required. Where inhalation exposure is possible, use a respirator fitted with type P3 (EN 143) particulate cartridges. Given the carcinogenicity and reproductive toxicity classifications, engineering controls (fume hood/local exhaust ventilation) and a written handling/exposure-control plan are strongly recommended in addition to PPE.

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FAQs: Nickel (II) acetate

Yes. It carries a Category 1A carcinogenicity classification (H350) along with a Category 1B reproductive toxicity classification (H360D). These are established GHS hazard classes for this compound, so it should be handled with corresponding administrative and engineering controls.

At minimum, eye protection, a face shield, and chemical-resistant gloves. Because it can cause allergic/respiratory sensitization (H317, H334) and organ damage from repeated exposure (H372), a P3 (EN 143)-rated respirator is recommended whenever dust or aerosol exposure is possible.

As a Storage Class 6.1C material — segregated from incompatible substances, in a tightly closed container, in a cool, dry, well-ventilated area with restricted access.

Its high water solubility lets researchers dissolve a precisely known amount of nickel into a reaction mixture, while its acetate and water ligands allow it to convert cleanly into nickel oxide/hydroxide under hydrothermal or sol-gel conditions.

No. The tetrahydrate form includes four water molecules per formula unit (MW 248.84), which affects its physical properties and how it should be weighed for reactions requiring an anhydrous nickel source.