506-78-5 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 506-78-5 differently. You can refer to the following data:
1. Iodine cyanide (cyanogen iodide) appears as light pink crystalline or brown-coloured powder and is soluble in water. It is stable but sensitive to light. It is incompatible with strong acids, strong bases, and strong oxidising agents. Cyanogen iodide decomposes on contact with acids, bases, and ammonia alcohols and on heating producing toxic gases including hydrogen cyanide. It reacts with carbon dioxide or slowly with water to produce hydrogen cyanide.
2. Cyanogen iodide is a combustible, white crys-
talline solid. Very pungent odor.
Uses
Different sources of media describe the Uses of 506-78-5 differently. You can refer to the following data:
1. Generally for destroying all lower forms of life. In taxidermy for preserving insects, butterflies, etc.
2. Cyanogen bromide is used in taxidermy for preserving insects, butterflies, and so on (Merck 1989).
General Description
White needles with a very pungent odor. Used in taxidermists' preservatives and generally for destroying all lower forms of life. Toxic by inhalation or ingestion.
Air & Water Reactions
Water soluble.
Reactivity Profile
Phosphorus(molten) plus CYANOGEN IODIDE reacts with incandescence to produce phosphorus iodide, [NFPA 491M, 1991]. Benzene and cyanogen halides yield HCl as a byproduct (Hagedorn, F. H. Gelbke, and Federal Republic of Germany. 2002. Nitriles. In Ullman Encyclopedia of Industrial Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA.).
Health Hazard
Different sources of media describe the Health Hazard of 506-78-5 differently. You can refer to the following data:
1. Causes convulsions, paralysis and death from respiratory failure. Highly toxic; strong irritant to eyes and skin. (Non-Specific -- Cyanide or Cyanide Mixture, Dry): Poisonous, may be fatal if swallowed or absorbed through skin. Contact may cause burns to the skin and eyes. Fire may produce irritating or poisonous gases.
2. Cyanogen bromide is a highly poisonous substance. Toxic routes are oral intake and skin absorption. Acute toxic symptoms on test animals were convulsion, paralysis, and respiratory failure. Ingestion of a 5-g amount could be fatal to humans. LDLo value, oral (cats): 18 mg/kg LDLo value, subcutaneous (dogs): 19 mg/kg Cyanogen iodide is an irritant to skin.
Fire Hazard
When heated to decomposition, CYANOGEN IODIDE emits very toxic fumes of nitrogen oxides, cyanide, and iodide. Avoid phosphorus.
Safety Profile
A poison by ingestion
and subcutaneous routes. Violent reaction
with P. See other cyanogen entries;
CYANIDE and IOdiDES. When heated to
decomposition it emits very toxic fumes of
NOx, CN-, and I-
Potential Exposure
Reacts slowly with water releasing
hydrogen cyanide. Incompatible with phosphorus (molten);
reacts with incandescence to produce phosphorus
iodide
. Contact with alcohols, acids, ammonia,
carbon dioxide or alkaline material and bases produces
toxic gases including hydrogen cyanide. Incompatible with
nitriles.
Shipping
UN2928 Toxic solids, corrosive, organic, n.o.s.,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials,
8-Corrosive material, Technical Name Required. UN3290
Toxic solid, corrosive, inorganic, n.o.s., Hazard class: 6.1;
Labels: 6.1-Poisonous materials, 8-Corrosive material.
UN1588 Cyanides, inorganic, solid, n.o.s., Hazard Class:
6.1; Labels: 6.1-Poisonous materials
Purification Methods
This compound is POISONOUS, and the precautions for cyanogen bromide (above) apply here. The reagent (ca 5.9g) is dissolved in boiling CHCl3 (15mL), filtered through a plug of glass wool into a 25mL Erlenmeyer flask. Cool to room temperature for 15minutes, then place it in an ice-salt bath and cool to -10o. This cooling causes a small aqueous layer to separate as ice. The ice is filtered with the CNI, but melts on the filter and is also removed with the CHCl3 used as washing liquid. The CNI which is collected on a sintered glass funnel is washed 3x with CHCl3 (1.5mL at 0o) and freed from last traces of solvent by placing it on a watch glass and exposing it to the atmosphere in a good fume cupboard at room temperature for 1hour to give colourless needles (ca 4.5g), m 146-147o (sealed capillary totally immersed in the oil bath). The yield depends slightly on the rapidity of the operation; in this way loss by sublimation can be minimised. If desired, it can be sublimed under reduced pressure at temperatures at which CNI is only slowly decomposed into I2 and (CN)2. The vacuum will need to be renewed constantly due to the volatility of CNI. [Bak & Hillebert Org Synth Coll Vol IV 207 1963.]
Incompatibilities
Reacts slowly with water releasing
hydrogen cyanide. Incompatible with phosphorus (molten);
reacts with incandescence to produce phosphorus
iodide
. Contact with alcohols, acids, ammonia,
carbon dioxide or alkaline material and bases produces
toxic gases including hydrogen cyanide. Incompatible with
nitriles.
Waste Disposal
A suitable method for destroying cyanogen iodide may consist of treatment with caustic soda, followed by adding sodium hypochlorite (laundry bleach) to oxidize the cyanide to nontoxic cyanate.
Check Digit Verification of cas no
The CAS Registry Mumber 506-78-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,0 and 6 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 506-78:
(5*5)+(4*0)+(3*6)+(2*7)+(1*8)=65
65 % 10 = 5
So 506-78-5 is a valid CAS Registry Number.
InChI:InChI=1/CIN/c2-1-3
506-78-5Relevant articles and documents
Lang, R.
, p. 42 - 62 (1925)
The photoisomerization of aqueous ICN studied by subpicosecond transient absorption spectroscopy
Larsen, Jane,Madsen, Dorte,Poulsen, Jens-Aage,Poulsen, Tina D.,Keiding, Soren R.,Thogersen, Jan
, p. 7997 - 8005 (2002)
The photolysis of aqueous ICN at 266 nm was studied using transient absorption spectroscopy. It was observed that the caging of the I and CN photoproducts using the surrounding water molecules limited the I and CN quantum yield to 37% after 1 picosecond (
McCulloch, N.
, p. 700 - 705 (1892)
The [ICNI]+ cation: A combined experimental and theoretical study. Reaction of [ICNI]+[AsF6]- with CsN3
Klapoetke, Thomas M.
, p. 553 - 557 (2007/10/03)
(Iodocyano)iodine hexafluoroarsenate, [ICNI]+[AsF6]-, containing the linear 22-valence-electron [ICNI]+ cation was synthesized either by the reaction of iodine cyanide with [I3]+[AsF6]- or directly from ICN, I2 and AsF5 and characterized by chemical analysis, IR, Raman and 19F NMR data. A combined vibrational (IR, Raman) and theoretical study revealed the [ICNI]+ cation to be linear, the preference of the linear over the bent structure can easily be understood in terms of hyperconjugative interactions in the cationic species [natural bond order (NBO) analysis]. The molecular structure of the [ICNI]+ cation was computed semiempirically (Austin Model 1, AMI; reparameterization of AM1, PM3) and ab initio at the Hartree-Fock (HF/6-31G*) and correlated RMP2 (RMP, restricted Moller-Plesset) and RMP4(SDQ) levels of theory using quasi-relativistic pseudo-potentials (LANL2DZ) for the icdine atoms. The computed structural parameters at the highest level applied are: Cx, symmetry, RMP4(SDQ), d(I-C) = 2.001, d(C≡N) = 1.167, d/(N-I) = 2.021 A. The N-I bond dissociation enthalpy for [ICN-I]+ was calculated ab initio at the electron-correlated RMP2 level of theory as 207.4 kJ mol-1. The metathetical reaction of [ICNI]+[AsF6]- with CsN3 in SO2ClF afforded IN3, Cs+[AsF6]- and ICN.
