| Identification | Back Directory | [Name]
NICKEL CYANIDE | [CAS]
557-19-7 | [Synonyms]
dicyanonickel
NICKEL CYANIDE
nickeldicyanide
Dicyanonickel(II)
nickel(ii)cyanide
Nickel(II)dicyanide
rcrawastenumberp074
nickelcyanide(ni(cn)2)
NICKEL CYANIDE TETRAHYDRATE | [EINECS(EC#)]
209-160-8 | [Molecular Formula]
C2N2Ni | [MDL Number]
MFCD00049490 | [MOL File]
557-19-7.mol | [Molecular Weight]
110.73 |
| Chemical Properties | Back Directory | [Appearance]
Nickel cyanide is a yellowish-brown plates or
powder that may change to a green color by absorbing
moisture. Odor is a weak almond odor like cyanide. | [Melting point ]
200°C -4H₂O | [density ]
2.393 g/cm3 | [form ]
solid | [Stability:]
Stable, but reacts violently with magnesium. | [Merck ]
14,6506 | [Uses]
Metallurgy, electroplating. | [EPA Substance Registry System]
Nickel(II) cyanide (557-19-7) |
| Hazard Information | Back Directory | [Chemical Properties]
green powder | [General Description]
NICKEL CYANIDE is an apple-green powder or a green crystalline solid. Insoluble in water. Toxic by inhalation and by ingestion. Carcinogenic. Produces toxic oxides of nitrogen in fires. | [Air & Water Reactions]
Insoluble in water. | [Reactivity Profile]
NICKEL CYANIDE is thermally unstable and easily oxidized. Weakly basic. Liberates flammable and lethally poisonous hydrogen cyanide gas on contact with acids or acid fumes. Undergoes violent reactions with fluorine, hypochlorites, nitric acid, nitrates, nitrites. Undergoes an explosive reaction if melted with nitrites or chlorates (at about 450°C). Emits highly toxic cyanide fumes when heated to decomposition. [Lewis, 3rd ed., 1993, p. 360, 912]. Undergoes an incandescent reaction if heated with magnesium [Mellor, 1940, vol. 4, p. 271]. | [Health Hazard]
DUST: POISONOUS IF INHALED. Irritating to eyes, nose and throat. SOLID: POISONOUS IF SWALLOWED. Irritating to skin and eyes. | [Fire Hazard]
Not flammable. | [Hazard]
Highly toxic. | [Potential Exposure]
Nickel cyanide is used in metallurgy,
electroplating and making other chemicals. | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions, including
resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility for medical observation, up to 2 days and test for
urine nickel. When this chemical has been swallowed, get
medical attention. Give large quantities of water and induce
vomiting. Do not make an unconscious person vomit.
Medical observation is recommended for 24 48 hours after
breathing overexposure, as pulmonary edema may be
delayed. As first aid for pulmonary edema, a doctor or
authorized paramedic may consider administering a drug or
other inhalation therapy. Use amyl nitrate capsules if symptoms
develop. All area employees should be trained regularly
in emergency measures for cyanide poisoning and in
CPR. A cyanide antidote kit should be kept in the immediate
work area and must be rapidly available. Kit ingredients
should be replaced every 1 2 years to ensure freshness.
Persons trained in the use of this kit; oxygen use, and CPR
must be quickly available. | [Shipping]
UN1653 Nickel cyanide, Hazard Class: 6.1;
Labels: 6.1-Poisonous materials. and equipped in OSHA 1910.156. The only respirators
recommended for fire fighting are SCBAs that have full
facepieces and are operated in a pressure-demand or other
positive-pressure mode. | [Incompatibilities]
Nnickel cyanide is thermally
unstable and easily oxidized. Weakly basic. Liberates flammable
and lethally poisonous hydrogen cyanide gas on contact
with acids or acid fumes. Undergoes violent reactions
with fluorine, hypochlorites, nitric acid, nitrates, nitrites.
Undergoes an explosive reaction if melted with nitrites or
chlorates (at about 450 C). Violent reaction with magnesium.
Keep away from acids, active metals, heat, or CO2;
contact can cause release of toxic cyanide gas. | [Waste Disposal]
Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant
(≥100 kg/mo) must conform with EPA regulations governing
storage, transportation, treatment, and waste disposal. | [Physical properties]
The tetrahydrate, Ni(CN)2?4H2O constitutes apple green plates or powder; loses water of crystallization on heating at 200°C; decomposes on further heating; insoluble in water; slightly soluble in dilute acids; soluble in potassium cyanide solution and in ammonia, caustic soda, caustic potash and other bases. | [Preparation]
Nickel cyanide is prepared by treating a soluble nickel salt, such as nickel chloride or nickel sulfate, with potassium cyanide solution: Ni2+ + 2CNˉ → Ni(CN)2
The product is a tetrahydrate, Ni(CN)2?4H2O, which on heating at 200°C yields yellow-brown anhydrous salt, Ni(CN)2. | [Reactions]
The most interesting reaction of nickel(II) cyanide is the formation of clathrate compounds
in the presence of ammonia. When a solution of Ni(CN)2 in aqueous ammonia is
shaken with benzene, a pale violet precipitate of the benzene clathrate Ni(CN)2?NH3?C6H6
is obtained. In this compound the Ni and CN groups form layers with ammonia molecules
bonded above and below the planes of the layers on alternate nickel atoms. Thus half the
nickel atoms are octahedrally surrounded by nitrogen (Ni-N=2.15 ?, N1-NH3 = 2.06 à)
and half are planar 4-coordinated by carbon (Ni-C=1.76?). The benzene
molecules occupy the holes (cages) formed between the layers. The average
magnetic moment per nickel atom is 2.2 BM, and it has thus been established that the 4-
coordinate nickel atoms are diamagnetic while the 6-coordinate atoms are paramagnetic
with two unpaired electron spins. |
| Safety Data | Back Directory | [RIDADR ]
UN1653 | [HazardClass ]
6.1 | [PackingGroup ]
II | [HS Code ]
28371990 | [Safety Profile]
Confirmed human
carcinogen. A poison. Incandescent reaction
when heated with magnesium. When heated
to decomposition it emits very toxic fumes
of CN-. See also CYANIDE and NICI(EL
COMPOUNDS. | [Hazardous Substances Data]
557-19-7(Hazardous Substances Data) |
|
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Alfa Aesar
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