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Benzonitrile

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Benzonitrile manufacturers

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  • What is Benzonitrile?
  • Benzonitrile is the chemical compound with the formula C6H5(CN), abbreviated PhCN. This aromatic organic compound is a colorle....
  • Aug 11,2020
Benzonitrile Basic information
Product Name:Benzonitrile
Synonyms:PHENYL CYANIDE;PHENYLMETHANITRILE;Benzontrile;Benzoitrile;BENZONITRILE, 99.9%, HPLC GRADE;BENZONITRILE, REAGENTPLUS, 99%;BENZONITRILE OEKANAL, 250 ML;BENZONITRILE, ANHYDROUS, 99+%
CAS:100-47-0
MF:C7H5N
MW:103.12
EINECS:202-855-7
Product Categories:Organics;Sure/Seal Bottles;ACS and Reagent Grade Solvents;Carbon Steel Cans with NPT Threads;ReagentPlus;ReagentPlus Solvent Grade Products;Industrial/Fine Chemicals;Intermediates;Semi-Bulk Solvents;Solvent Bottles;Solvent by Application;Solvent Packaging Options;Solvents;Anhydrous Solvents
Mol File:100-47-0.mol
Benzonitrile Structure
Benzonitrile Chemical Properties
Melting point -13 °C (lit.)
Boiling point 191 °C (lit.)
density 1.01
vapor density 3.6 (vs air)
vapor pressure 1 hPa at 20 °C
refractive index n20/D 1.528(lit.)
Fp 161 °F
storage temp. Store below +30°C.
solubility 10g/l
form Liquid
color Clear colorless to slightly yellow
Relative polarity0.333
OdorAlmond-like.
explosive limit1.4-7.2%(V)
Water Solubility 10 g/L (100 ºC)
λmaxλ: 300 nm Amax: 1.0
λ: 310 nm Amax: 0.40
λ: 335 nm Amax: 0.03
λ: 360-400 nm Amax: 0.01
Merck 14,1097
BRN 506893
Stability:Stable. Incompatible with strong bases, strong acids, strong oxidizing agents, strong reducing agents. Air-sensitive. Combustible.
InChIKeyJFDZBHWFFUWGJE-UHFFFAOYSA-N
CAS DataBase Reference100-47-0(CAS DataBase Reference)
NIST Chemistry ReferenceBenzonitrile(100-47-0)
EPA Substance Registry SystemBenzonitrile (100-47-0)
Safety Information
Hazard Codes Xn
Risk Statements 21/22-38
Safety Statements 23
RIDADR UN 2224 6.1/PG 2
WGK Germany 2
RTECS DI2450000
Autoignition Temperature550 °C
TSCA Yes
HazardClass 6.1
PackingGroup II
HS Code 29269090
Hazardous Substances Data100-47-0(Hazardous Substances Data)
ToxicityLDLo orl-rat: 720 mg/kg AMRL** TR-74-78,74
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
Benzonitrile Usage And Synthesis
General Description

Benzonitrile is a clear colorless liquid with an almond-like odor. Flash point 161°F. Denser (at 8.4 lb / gal) than water and slightly soluble in water. Used as a specialty solvent and to make other chemicals.

Chemical PropertiesBezonitrile is a colorless, oily liquid. It has an almond odor.
Chemical PropertiesWhen heated to decomposition, benzonitrile emits toxic hydrogen cyanide and oxides of nitrogen (HSDB 1988).
OccurrenceBenzonitrile is reported to be found in natural cocoa aroma), in milk products, roasted filberts and peanuts and cooked trassi . Benzonitrile also has been detected in the thermal decomposition products of flexible polyurethane foam.
UsesThe most important commercial use for benzonitrile is the synthesis of benzoguanamine, which is a derivative of melamine and is used in protective coatings and molding resins.
UsesManufacture of benzoguanamine; intermediate for rubber chemicals; solvent for nitrile rubber, spe- cialty lacquers, and many resins and polymers, and for many anhydrous metallic salts.
Production MethodsBenzonitrile can be prepared by one of the following methods: 1) on a small scale by the dehydration in an inert solvent with phosphorus oxychloride or benzenesulfonyl chloride and an organic amine; 2) from benzoic acid by heating with lead thiocyanate; 3) by heating sodium benzenesulfonate with sodium cyanide or by adding benzenediazonium chloride solution to a hot aq sodium cyanide solution containing cupric sulfate and distilling by ammoxidation of toluene.
DefinitionChEBI: A nitrile that is hydrogen cyanide in which the hydrogen has been replaced by a phenyl group.
Production MethodsBenzonitrile can be produced in high yield by the vapor-phase catalytic ammoxidation of toluene.
Synthesis Reference(s)Chemistry Letters, 13, p. 1913, 1984
Journal of the American Chemical Society, 111, p. 4903, 1989 DOI: 10.1021/ja00195a050
Tetrahedron Letters, 11, p. 2085, 1970
Air & Water ReactionsSlightly soluble in water.
Reactivity ProfileThe cyano group can be readily hydrolyzed in the presence of mineral acids to produce stable, moderately toxic benzoic acid . When heated to decomposition, Benzonitrile emits highly toxic fumes of nitrogen oxides and hydrogen cyanide [Sax, 9th ed., 1996, p. 353].
HazardHigh toxicity; absorbed by skin.
Health HazardBenzonitrile may enter the human body by ingestion, absorption through the skin, or inhalation. The earliest symptoms of cyano compound intoxication may be weakness, headaches, confusion, and occasionally nausea and vomiting. The respiratory rate and depth will usually be increased at the beginning and at later stages become slow and gasping. Blood pressure is usually normal, especially in the mild or moderately severe cases, although the pulse rate is usually more rapid than normal.
Health HazardFollowing an occupational accident in which a worker's head and clothing were drenched with benzonitrile (Zeller et al 1969), the worker suffered severe respiratory distress and tonic convulsions between periods of unconsciousness which lasted for 75 min. Thereafter he gradually recovered, but several years later he experienced episodes of unconsciousness which might have been related to the benzonitrile exposure.
Extensive reddening and blister formation resulted from accidental exposure of human skin to benzonitrile (Zeller et al 1969). A maximization test (Kligman 1966; Kligman and Epstein 1975) was also carried out on 35 volunteers. Benzonitrile was tested at a concentration of 2% in petrolatum on 27 volunteers in a mixed panel, and was found to produce no sensitization reactions after a 48 h closed-patch test (Opdyke 1979).
Fire HazardSpecial Hazards of Combustion Products: Toxic hydrogen cyanide and oxides of nitrogen may form in fire.
Chemical ReactivityReactivity with Water No reaction; Reactivity with Common Materials: Will attack some plastics; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.
Industrial usesBenzonitrile is used as an intermediate for rubber chemicals and as a solvent for nitrile rubber, specialty lacquers, many resins, polymers and for many anhydrous metallic salts (HSDB 1988; Hawley 1981). It is principally used as an intermediate for benzoguanamine (HSDB 1988). It is also used as an additive in nickel-plating baths, separating naphthalene and alkylnaphthalenes from non-aromatics by azetropic distillation; as jet-fuel additive; in cotton bleaching baths; as a drying additive for acrylic fibers; and in the removal of titanium tetrachloride and vanadium oxychloride from silicon tetrachloride (HSDB 1988; Smiley 1981). Benzonitrile is also used in perfumes at a maximum level of 0.2% in the final product (Opdyke 1979).
Safety ProfilePoison by intraperitoneal andsubcutaneous routes. Moderately toxic by ingestion,inhalation, and skin contact. A skinirritant. Combustible liquid. When heated todecomposition it emits toxic fumes of CN- and NOx.
Potential ExposureBezonitrile is used as an electroplating agent; in organic synthesis of pharmaceuticals; dyestuffs; rubber chemicals; as a solvent and chemical intermediate.
MetabolismBenzonitrile is mainly hydroxylated in vivo to cyanophenols, a small amount being hydrolysed to benzoic acid (Williams 1959). Benzonitrile also forms 6>-hydroxybenzonitrile, m-hydroxybenzonitrile, and /p-hydroxybenzonitrile in rabbits (HSDB 1988). In rabbit, 50% of a dose of 150 mg/kg was converted to conjugated cyanophenols and 10% of the benzonitrile fed was excreted as benzoic acid. Hydrogen cyanide is not a metabolite of benzonitrile (Williams 1959) and cyanide was not found to be formed by benzonitrile either in vivo or in vitro (Tanii and Hashimoto 1984). The in vivo microsomal hydroxylation of specifically deuterated benzonitrile in the rat yielded mainly 4-hydroxybenzonitrile with 41% retention of deuterium (Daly et al 1968).
ShippingUN2224 Benzonitrile, Hazard Class: 6.1; Labels: 6.1—Poisonous materials.
Purification MethodsDry benzonitrile with CaSO4, CaCl2, MgSO4 or K2CO3, and distil it from P2O5 in an all-glass apparatus, under reduced pressure (b 69o/10mm), collecting the middle fraction. Distillation from CaH2 causes some decomposition of benzonitrile. Isonitriles can be removed by preliminary treatment with conc HCl until the odour of isonitrile (carbylamine) has gone, followed by preliminary drying with K2CO3. (This treatment also removes amines.) Steam distil (to remove small quantities of carbylamine). The distillate is extracted into ether, washed with dilute Na2CO3, dried overnight with CaCl2, and the ether is removed by evaporation. The residue is distilled at 40mm (b 96o) [Kice et al. J Am Chem Soc 82 834 1960]. Conductivity grade benzonitrile (specific conductance 2 x 10-8 mho) is obtained by treatment with anhydrous AlCl3, followed by rapid distillation at 40-50o under vacuum. After washing with alkali and drying with CaCl2, the distillate is redistilled in a vacuum several times at 35o before fractionally crystallising several times by partial freezing. It is dried over finely divided activated alumina from which it is withdrawn when required [Van Dyke & Harrison J Am Chem Soc 73 402 1951]. [Beilstein 9 IV 892.]
IncompatibilitiesMay form explosive mixture with air. Strong acids which can release hydrogen cyanide. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. Nitriles may polymerize in the presence of metals and some metal compounds. They are incompatible Benzonitrile 403 with acids; mixing nitriles with strong oxidizing acids can lead to extremely violent reactions. Nitriles are generally incompatible with other oxidizing agents such as peroxides and epoxides. The combination of bases and nitriles can produce hydrogen cyanide. Nitriles are hydrolyzed in both aqueous acid and base to give carboxylic acids (or salts of carboxylic acids). These reactions generate heat. Peroxides convert nitriles to amides. Nitriles can react vigorously with reducing agents. Acetonitrile and propionitrile are soluble in water, but nitriles higher than propionitrile have low aqueous solubility. They are also insoluble in aqueous acids.
Waste Disposal(1) Mix with calcium hypochlorite and flush to sewer with water or (2) incinerate.
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