Nickel Acetate, Tetrahydrate
Nickel Acetate, Tetrahydrate
Ni(CH₃COO)₂·4H₂O
Nickel acetate tetrahydrate is of light-green, fine monoclinic crystals and smells faint acetic odour; readily soluble in methanol, ethanol; sparingly soluble in ether, acetone.
Grades
Nickel acetate tetrahydrate is available in Technical Pure Grade.
Specifications
Grade | Technical Pure |
Assay | ≥99% |
Nickel | ≥23.0 |
Water insoluble（H2O） | ≤0.02 |
Iron | ≤0.005 |
Cobalt | ≤0.05 |
Lead | ≤0.001 |
Zinc | ≤0.05 |
Chlorine | ≤0.005 |
Sulfate | ≤0.01 |
Methods of analysis
Ni content: complexometric EDTA titration at pH 10 with murexide (spec. 23–24 %, typical 23.5 %) or ICP-AES.
Water of hydration: 110 °C loss-on-drying (theor. 14.5 %).
Impurities (typical) : Co < 0.2 %, Fe ≤ 20 ppm, Pb ≤ 5 ppm, Cd ≤ 5 ppm, Cu ≤ 20 ppm, Zn ≤ 20 ppm, Ca ≤ 100 ppm, Mg ≤ 50 ppm – all by ICP-OES .
Anions: IC – Cl⁻, SO₄²⁻ each ≤ 0.05 %.
Identity: FT-IR (ν COO 1600, 1420 cm⁻¹) and XRPD vs. ICDD 00-027-0166.
Packing
Standard: 25 kg net UN-approved PE bag placed inside a CP-3/CP-1 or EP export carton (40 bags = 1 t) .
Optional: 100g–5 kg laboratory packs in double LDPE + aluminium-laminated pouch.
Marking: “ NICKEL COMPOUND–HARMFUL/ENVIRONMENTALLY HAZARDOUS – KEEP DRY ”.
Storage and handling
Store in a dry, well-ventilated area at 15–30 °C; keep bags tightly closed.
Avoid contact with strong acids, alkalis, oxidisers, foodstuffs.
Shelf life: ≥ 24 months in original, unopened packaging .
Handle with gloves and safety goggles; avoid dust generation – use local exhaust ventilation.
First aid measures
Inhalation: remove to fresh air, rest, seek medical attention if cough or dyspnoea.
Skin: remove contaminated clothing; wash with plenty of water ≥ 15 min; consult physician if irritation.
Eyes: hold eyelids apart, irrigate ≥ 15 min; immediate ophthalmologic care.
Ingestion: rinse mouth; do NOT induce vomiting; drink 200 mL water if conscious; send the victim to hospital with package.
Fire and explosion data
NFPA 704: Health 2, Flammability 0, Instability 0.
Non-flammable solid; decomposes on strong heating releasing acetic acid and NiO fumes.
Use water spray, dry chemical, CO₂ or alcohol-resistant foam to extinguish adjacent fires; contain copper-coloured run-off water.
Application
Nickel electro-plating: source of Ni²⁺ in Watts-type, sulphamate and microporous baths.
Cold-sealing of anodised aluminium: pore-closing additive giving 20–30 % better corrosion resistance.
Catalyst: cross-couplings, hydrogenations, polyoxotungstate cluster synthesis for molecular magnets.
Textile dyeing: mordant for direct and reactive dyes; improves colour fastness.
Precursor for other nickel chemicals (carbonate, oxide, complex salts) and hidden/thermo-chromic inks.
Properties
Physical State : powder solid | Molecular Weight : 248.86 |
Appearance : greenish-blue | Melting Point/Range : 250 °C / 482 °F |
Odor : faint acetic odour | Flash point: no information available |
Density: 1.798 g cm⁻³ (25 °C) | Solubility: soluble in water |
Bulk density: ≈ 0.9 kg L⁻¹ | Decomposition Temperature：> 80°C |
Solubility: 182 g L⁻¹ H₂O (20 °C); soluble in methanol/ethanol; insoluble in ether, n-octanol | pH : no information available |
Physiological/toxicological properties
Carcinogenicity: Ni (II) compounds – IARC Group 1 (carcinogenic to humans); EU CLP Cat. 1B.
Sensitisation: skin & respiratory; may provoke asthma and nickel itch.
Exposure limits: NIOSH REL 0.015 mg Ni m⁻³ (TWA), IDLH 10 mg Ni m⁻³.
Acute oral LD₅₀ (rat, anhyd.): ≈ 350 mg kg⁻¹ (harmful).
Chronic: risk of nasal/lung cancer, allergic dermatitis; reproductive toxicity suspected (H360D) .
Personal protection: P2 dust mask, nitrile gloves, protective clothing; routine biological monitoring of urinary Ni recommended for exposed workers.
Environmental & Transport
UN 3077, Environmentally hazardous solid, n.o.s. (nickel compound), Class 9, PG III.
Very toxic to aquatic life with long-lasting effects (H410); prevent release to drains.
Dispose as heavy-metal hazardous waste; follow local nickel-compound regulations.