333-20-0 Usage
Chemical Description
Different sources of media describe the Chemical Description of 333-20-0 differently. You can refer to the following data:
1. Potassium thiocyanate and ammonium thiocyanate are both salts that are used in various chemical reactions.
2. Potassium thiocyanate is a chemical compound with the formula KSCN.
Outline
Potassium thiocyanate, molecular formula is KSCN, it is also known as KSCN, English is Potassium Thiocyanate, it is colorless monoclinic crystal. The relative density is 1.886. Melting point is about 172.3 ℃. It is soluble in water and it can cool because of the absorption of heat, it is also soluble in alcohol (ethanol) and acetone. Crystalline hemihydrate (KSCN.0.5H2O) can be obtained at low temperature, it is steady at-29-6.8℃, and it can turn blue when be broiled at about 430℃, but it then re-becomes colorless when be colded. When be heated to 500℃, it can decompose. The blood red ferric thiocyanate complex ion FeSCN2 + (iron thiocyanate) can generate in case of Fe3 + (ferric), which is the sensitive method to test the Fe3 + ion, the method can eliminate the influence of all other known metal ions. And it can not react with ferrous salts. It is hygroscopic, and it should be sealed. It has low toxicity. But potassium cyanate is highly toxic substances, the country has limited its production.
Solubility in water (g / 100ml)
The grams which dissolved in per 100 ml of water at different temperatures (℃) :
177g/0 ℃; 198g/10 ℃; 224g/20 ℃; 255g/30 ℃; 289g/40 ℃
372g/60 ℃; 492g/80 ℃; 571g/90 ℃; 675g/100 ℃
Chemical properties
It is colorless monoclinic crystal. It is soluble in water, and it can cool because of the absorption of heat. It is also soluble in alcohol and acetone.
The above information is edited by the lookchem of Wang Xiaodong.
Uses
Different sources of media describe the Uses of 333-20-0 differently. You can refer to the following data:
1. It can be used in electroplating industry for stripping agent, it can also be used refrigerant. It can also be used in the dye industry, photographic industry, pesticides and steel analysis.
2. Analysis of siliver ion; indirect determination of chloride, bromide, and iodide.
3. manufacture of artificial mustard oil; printing and dyeing textiles; in photography as intensifier; in analytical chemistry. The sodium salt now is replacing it for most of these uses.
4. Used as a source of thiocyanate.
5. Potassium Thiocyanate has been used as a catalyst in a one-pot reaction of dialkyl acetylenedicarboxylates with indane-1,3-dione. Potassium Thiocyanate has been used as a selective bacterial inhibitor to create ESS-3 broth to allow co-?enrichment of the target pathogens and suppress growth of some non-?target pathogens
Production method
The mothod of ammonium thiocyanate transformation which is the pressurized synthesis reaction of carbon disulfide and ammonia can generate ammonium thiocyanate and the by-product is ammonium hydrosulfide, and then by desulfurization, ammonium hydrosulfide can evaporate and remove which is decomposed into hydrogen sulfide, when potassium carbonate solution is added into the temperature of 105℃ liquid, it can generates potassium thiocyanate. The reaction process will produce large amount of carbon dioxide and ammonia. Ammonia is recyclable, the reaction solution is filtered to remove insoluble material, and then reduction vaporization is proceeded, and then cooling and crystallization, centrifugal separation is proceeded to obtain industrial potassium thiocyanate.
CS2 + 3NH3 → NH4SCN + NH4HS
NH4HS → NH3 ↑ + H2S ↑
2NH4SCN + K2CO3 → 2KSCN + (NH4) 2CO3
(NH4) 2CO3 → 2NH3 ↑ + CO2 ↑ + H2O
Chemical Properties
Different sources of media describe the Chemical Properties of 333-20-0 differently. You can refer to the following data:
1. Potassium thiocyanate, potassium sulfocyanide, potassium sulfocyanate, potassium rhodanate, KCNS, white solid, formed by fusing potassium cyanide and sulfur, and then crystallizing.
2. Potassium thiocyanate, KSCN,also known as potassium sulfocyanate and potassium rhodanide, is a colorless deliquescent crystalline solid that melts at 173°C (343 OF) and decomposes at 500°C(932 OF). Soluble in water and alcohol,it has no odor and a saline taste.Potassium thiocyanate is used in printing and dyeing textiles, freezing mixtures, manufacturing chemicals, photography and medicine.
Physical properties
Colorless rhombohedral crystals; deliquesces; density 1.886 g/cm3at 15°C;melts at 173.2°C, the color of the fused salt changing from brown to green and then blue; turns white again on cooling; decomposes at about 500°C; very soluble in water, 177 g/100mL at 0°C and 217 g/100mL at 20°C; solution cools upon dissolution; aqueous solution neutral; readily dissolves in acetone and liquid ammonia; moderately soluble in hot alcohol.
Definition
Different sources of media describe the Definition of 333-20-0 differently. You can refer to the following data:
1. ChEBI: A potassium salt which is the monopotassium salt of thiocyanic acid.
2. A colorless hygroscopic
solid. Its solution is used in a test for
iron(III) compounds, with which it turns a
blood-red color.
Preparation
Potassium thiocyanate may be made by adding caustic potash to a solution of ammonium thiocyanate, followed by evaporation of the solution. NH4SCN + KOH →KSCN + NH4OHAlso, the compound can be prepared by heating potassium cyanide with sulfur:KCN + S →KSCN.
General Description
Potassium thiocyanate is an inorganic potassium salt. Phase transitions in potassium thiocyanate (KSCN) have been investigated by X-ray diffraction studies. The order-disorder type transition with respect to the orientation of the thiocyanate ions was identified. Its polarized infrared spectrum has been reported. It participates in the ring-opening of aziridines. The reaction was carried out in the presence of sulfated zirconia to afford the corresponding β-aminothiocyanates.
Hazard
Toxic by ingestion.
Flammability and Explosibility
Nonflammable
Safety Profile
A human poison by
ingestion. Poison experimentally by intravenous route. An experimental
teratogen. Moderately toxic by subcutaneous
and ingestion routes. Large doses can cause
slun eruptions, psychoses, and collapse.
Incompatible with calcium chlorite and
perchloryl fluoride. When heated to
decomposition it emits very toxic fumes of
CN-, K2O, SOx, and NOx. See also
THIOCYANATES.
Purification Methods
Crystallise it from H2O if much chloride ion is present in the salt, otherwise from EtOH or MeOH (optionally by addition of Et2O). Filter off on a Büchner funnel without paper, and dry it in a desiccator at room temperature before heating for 1hour at 150o, with a final 10-20minutes at 200o to remove the last traces of solvent [Kolthoff & Lingane J Am Chem Soc 57 126 1935]. Store it in the dark.
Check Digit Verification of cas no
The CAS Registry Mumber 333-20-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,3 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 333-20:
(5*3)+(4*3)+(3*3)+(2*2)+(1*0)=40
40 % 10 = 0
So 333-20-0 is a valid CAS Registry Number.
InChI:InChI=1/CNS.K/c2-1-3;/q-1;+1
333-20-0Relevant articles and documents
Fedin, V. P.,Sokolov, M. N.,Fedorov, V. Ye.,Yufit, D. S.,Struchkov, Yu. T.
, p. 35 - 40 (1991)
DIMETHYL TRISULFIDE AS A CYANIDE ANTIDOTE
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Paragraph 0033, (2015/11/17)
Dimethyl trisulfide (DMTS) antidote compositions may be used to as a cyanide poisoning antidote.
Complexation of phosphoryl-containing mono-, bi- and tri-podands with alkali cations in acetonitrile. Structure of the complexes and binding selectivity
Solov'ev, Vitaly P.,Baulin, Vladimir E.,Strakhova, Nadezhda N.,Kazachenko, Vladimir P.,Belsky, Vitaly K.,Varnek, Alexandre A.,Volkova, Tatiana A.,Wipff, Georges
, p. 1489 - 1498 (2007/10/03)
We present experimental and theoretical studies on new ionophores (L) which possess a high complexation ability for Li+or Na+cations. Four tri-podands(R1-O-C2H4-)3N[R 1 = -CH2-P(O)Ph2(P1), -C2H4-P(O)Ph2 (P2), -o-C6H4P(O)Ph2 (P3) and -o-C6H4-CH2-P(O)Ph2 (P4)], one bi-podand (R2-O-C2H4-)2N-CH3 [R2 = -o-C6H4-CH2-P(O)Ph2 (P5)] and one mono-podand [R2-O-(CH2-CH2-O)3R2 (P6)] containing phosphine oxide terminal groups have been synthesised. Stability constants, enthalpies and entropies of their complexation with lithium, sodium and potassium thiocyanates have been determined in acetonitrile at 298 K by a calorimetric titration technique. We find that tri-podands form a variety of complexes [(M+)3L, (M+)2L, M+L and M+L2)], whereas the bi- and mono-podand form only M+L complexes with Li+ and Na+, and M+L and M+L2 complexes with K+. Formation of poly-nuclear (M+)nL complexes of tri-podands in solution has been confirmed by electro-spray mass spectrometry. At relatively small concentrations of the ligand (CL0)S P1 binds Na+ much better than Li+, whereas P4 and P5 display a remarkable Li+/Na+ selectivity; at large CL0 the complexation selectivity decreases. X-Ray diffraction studies performed on monocrystals of complexes of NaNCS with tri-podands P2 and P3 show that Na+ is encapsulated inside a 'basket-like' pseudocavity, coordinating all donor atoms of the tri-podand. Molecular dynamics simulations on P2, P3 and P4 and on their 1:1 complexes with M+ in acetonitrile solution suggest that the structures of M+L complexes in solution are similar to those found for P2 and P3 complexes in the solid state.
EQUILIBRIUM CONSTANTS AND COMPLEXATION ENTHALPIES AND ENTROPIES OF LITHIUM, SODIUM, POTASSIUM, AMMONIUM, AND CALCIUM THIOCYANATES WITH BENZO-12-CROWN-4 IN ACETONITRILE
Solov'ev, V. P.,Strakhova, N. N.,Raevskii, O. A.
, p. 2163 - 2165 (2007/10/02)
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