540-72-7 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 540-72-7 differently. You can refer to the following data:
1. Sodium thiocyanate, a white rhombic system crystal, is soluble in water, ethanol, acetone; Relative density is 1.735. Melts at approx. 287℃. Decomposes on heating and under influence of light producing toxic fumes of sulfur oxides,nitrogen oxides and cyanides. Reacts violently with acids,strong bases and strong oxidants.
2. white crystalline powder
Uses
Different sources of media describe the Uses of 540-72-7 differently. You can refer to the following data:
1. Sodium thiocyanate is a valuable chemical raw material and has important uses in various sectors of the national economy. Sodium thiocyanate is mainly used as a solvent for spinning acrylic fibers, chemical analysis reagents, color film film rinses, certain plant defoliants, and airport road herbicides. Sodium thiocyanate is also used in pharmaceuticals, printing and dyeing, rubber processing, black nickel plating, and artificial mustard. Oil, etc. The main industrial production processes are: separation of sodium thiocyanate from waste liquid in coke oven gas, synthesis of sodium thiocyanate with sodium cyanide and sulfur, and production of sodium thiocyanate by metathesis reaction of ammonium thiocyanate and sodium hydroxide. The synthesis of sodium thiocyanate requires high purity HCN as raw material, which is costly and harsh.
2. Sodium Thiocyanate is used widely in chemical synthesis as source of thiocyanate anion such as in the conversion of alkyl halides to alkylthiocyanates.
3. manufacture of other thiocyanates, especially organic.
Physical properties
Colorless crystals or white powder; deliquescent; melts at 287°C; very soluble in water; soluble in alcohol.
Definition
ChEBI: An organic sodium salt which is the monosodium salt of thiocyanic acid.
Preparation
Sodium thiocyanate is prepared by boiling an aqueous solution of sodium cyanide with sulfur: NaCN + S → NaSCN.
Reactions
Sodium thiocyanate is an analytical reagent for measuring iodide. Other uses are dyeing and printing textiles, preparing thiocyanate salts, and nickel plating. Used in titrimetry.
General Description
Odorless white solid. Sinks and mixes with water.
Air & Water Reactions
Water soluble.
Reactivity Profile
Nitric acid violently oxidized a thiocyanate solution [Bretherick 1979 p. 121]. Caution should be exercised in treating a thiocyanate with an oxidizing agent such as a peroxide or chlorate as such mixtures have been known to explode. Special Hazards of Combustion Products: Irritating oxides of sulfur and nitrogen may form in fire [USCG, 1999]. Carbonyl sulfide is produced in a violent reaction by the mixture of sulfuric acid and Sodium thiocyanate.
Health Hazard
Inhalation of dust causes irritation of nose and throat. Ingestion of large doses causes vomiting, extreme cerebral excitement, convulsions, and death in 10-48 hrs.; chronic poisoning can cause flu-like symptoms, skin rashes, weakness, fatigue, vertigo, nausea, vomiting, diarrhea, confusion. Contact with eyes causes irritation. Prolonged contact with skin may produce various skin eruptions, dizziness, cramps, nausea, and mild to severe disturbance of the nervous system.
Fire Hazard
Special Hazards of Combustion Products: Irritating oxides of sulfur and nitrogen may form in fire.
Flammability and Explosibility
Nonflammable
Safety Profile
Poison by ingestion, intravenous, and subcutaneous routes. Moderately toxic by intraperitoneal route. Large doses taken internally cause vomiting, convulsions. Chronic poisoning is manifested by weakness, confusion, diarrhea, and skin rashes. When heated to decomposition it emits very toxic fumes of NOx, SOx, and Na2O. See also THIOCYANATES.
Purification Methods
It is recrystallised from EtOH or Me2CO, and the mother liquor is removed from the crystals by centrifugation. It is very deliquescent and should be kept in an oven at 130o before use. It can be dried in a vacuum at 120o/P2O5 [Partington & Winterton Trans Faraday Soc 30 1104 1934]. Its solubility in H2O is 113% at 10o, 178% at 46o, 225.6% at 101.4o; in MeOH 35% at 15.8o, 51% at 48o, 53.5% at 52.3o; in EtOH 18.4% at 18.8o, 24.4% at 70.9o; and in Me2CO 6.85% at 18.8o and 21.4% at 56o [Hughes & Mead J Chem Soc 2282 1929]. Sodium thiocyanate has also been recrystallised from water, acetonitrile or from MeOH using Et2O for washing, then dried at 130o, or dried under vacuum at 60o for 2days. [Strasser et al. J Am Chem Soc 107 789 1985, Szezygiel et al. J Am Chem Soc 91 1252 1987.] (The latter purification removes material reacting with iodine.) Sodium thiocyanate solutions can be freed from traces of iron by repeated batch extractions with Et2O.
Check Digit Verification of cas no
The CAS Registry Mumber 540-72-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,4 and 0 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 540-72:
(5*5)+(4*4)+(3*0)+(2*7)+(1*2)=57
57 % 10 = 7
So 540-72-7 is a valid CAS Registry Number.
InChI:InChI=1/CNS.Na/c2-1-3;/q-1;+1
540-72-7Relevant articles and documents
Microdetection of carbon in organic and inorganic compounds by ignition with sodium amide.
MOMOSE,UEDA,MUKAI
, p. 322 - 322 (1958)
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COMPOUNDS CONTAINING HYDRIDO-TRICYANO-BORATE ANIONS
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Page/Page column 52, (2013/02/28)
The present invention relates to compounds containing hydrido-tricya-borate anions, their preparation and their use, in particular as part of electrolyte formulations for electrochemical or optoelectronic devices.
Recovery of sodium thiocynate from industrial process solution using nanofiltration technique
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Page/Page column 6-11, (2008/06/13)
The present invention relates to a membrane-based nanofiltration process for separating sodium thiocyanate (NaSCN) from industrial solution containing impurities such as β-sulfopropionic acid, β-sulfopropionitrile, sodium sulfate and salts of iron and calcium in a single step to obtain a colorless aqueous solution for spinning of acrylic fibre in textile industry.
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.