Nickel , 20nm-100nm，99.9%metalsbasis , 7440-02-0

Synonym(s):
;Nickel;Nickel sponge;Raney Ni

CAS NO.：7440-02-0

Empirical Formula: Ni

Molecular Weight: 58.69

MDL number: MFCD00003414

EINECS: 231-111-4

PRODUCT Properties

• Melting point: 1453 °C (lit.)
• Boiling point: 2732 °C (lit.)
• Density: 8.9 g/mL at 25 °C (lit.)
• vapor density: 5.8 (vs air)
• storage temp.: no restrictions.
• solubility: insoluble in H2O; slightly soluble in dilute acid solutions
• form: wire
• color: White to gray-white
• Specific Gravity: 8.9
• PH: 8.5-12.0
• Odor: Odorless
• PH Range: 9 - 11 at 20 °C
• Resistivity: 6.97 μΩ-cm, 20°C
• Water Solubility: It is insoluble in water.
• Sensitive: air sensitive
• Merck: 14,8107
• Exposure limits: TLA-TWA (metal) 1 mg/m³ (ACGIH, MSHA, and OSHA); (soluble inorganic compounds) 0.1 mg(Ni)/m³ (ACGIH) 0.015 mg (Ni)/m³ (NIOSH); (insoluble inorganic compounds) 1 mg/m³ (ACGIH).
• Stability: Stable in massive form. Powder is pyrophoric - can ignite spontaneously. May react violently with titanium, ammonium nitrate, potassium perchlorate, hydrazoic acid. Incompatible with acids, oxidizing agents, sulfur.
• InChIKey: PXHVJJICTQNCMI-UHFFFAOYSA-N

Description and Uses

Nickel is a hard, silvery white, malleable metal chunk or grey powder. Nickel powder is pyrophoric – can ignite spontaneously. It may react violently with titanium, ammonium nitrate, potassium perchlorate, and hydrazoic acid. It is incompatible with acids, oxidising agents, and sulphur. The industrially important nickel compounds are nickel oxide (NiO), nickel acetate (Ni(C2H3O2), nickel carbonate (NiCO3), nickel carbonyl (Ni(CO)4), nickel subsulphide (NiS2), nickelocene (C5H5)2Ni, and nickel sulphate hexahydrate (NiSO4 · 6H2O).

Nickel compounds have been well established as human carcinogens. Investigations into the molecular mechanisms of nickel carcinogenesis have revealed that not all nickel compounds are equally carcinogenic: certain water-insoluble nickel compounds exhibit potent carcinogenic activity, whereas highly water-soluble nickel compounds exhibit less potency. The reason for the high carcinogenic activity of certain water-insoluble nickel compounds relates to their bioavailability and the ability of the nickel ions to enter cells and reach chromatin. The water-insoluble nickel compounds enter cells quite efficiently via phagocytic processes and subsequent intracellular dissolution. Nickel is classified as a borderline metal ion because it has both soft and hard metal properties and it can bind to sulphur, nitrogen, and oxygen groups. Nickel ions are very similar in structure and coordination properties to magnesium.

Nickel is used in various alloys, such asGerman silver, Monel, and nickel–chrome;for coins; in storage batteries; in spark plugs;and as a hydrogenation catalyst.

Safety

• Symbol(GHS): GHS07,GHS08
• Signal word: Danger
• Hazard statements: H317-H351-H372
• Precautionary statements: P201-P202-P260-P280-P302+P352-P308+P313
• Hazard Codes: C,Xi,Xn,F,T
• Risk Statements: 34-50/53-43-40-10-17-52/53-48/23
• Safety Statements: 26-45-60-61-36-22-36/37-16-15-5-36/37/39-43-28
• OEB: D
• OEL: TWA: 0.015 mg/m3 [*Note: The REL does not apply to Nickel carbonyl.]
• RIDADR: UN 1493 5.1/PG 2
• WGK Germany: 3
• RTECS: VW4725000
• F: 8
• Autoignition Temperature: 87 °C
• TSCA: Yes
• HazardClass: 4.1
• PackingGroup: II
• HS Code: 38151100
• Toxicity: Occupational exposures may occur in its mining, smelting, and refining. The general population ingests nickel in food. Skin sensitization and dermatitis leading to chronic eczema, called “nickel itch,” frequently occurs, especially in wearers of pierced earrings. Nickel can also irritate the conjunctiva and respiratory tract mucous membranes. Absorption from the digestive tract is poor, so systemic poisoning is rare, but since it is an irritant it acts as an emetic. Systemic effects include hyperglycemia, capillary damage, CNS depression, myocardial weakness, and kidney damage. Nickel and its compounds are carcinogenic following inhalation, but not following ingestion or skin contact. Cancer of the lung and nasal passages results, with a latent period of about 25 years; smokers are at greater risk. In addition to irritation and carcinogenesis, nickel carbonyl (nickel tetracarbonyl, Ni(CO)4) exerts relatively mild, tran_x0002_sientinitial symptoms including headache, giddiness, nausea, and shortness of breath. These symptoms are followed by very serious symptoms hours to days later, consisting of tightness in the chest, shortness of breath, rapid respiration, pulmonary edema, cyanosis, and extreme weakness; this can be fatal. Heat decomposition of nickel carbonyl yields carbon monoxide. Chelating agents can be used to remove nickel from the body.
• IDLA: 10 mg Ni/m3