1321-74-0 Usage
Description
Divinylbenzene (DVB) is a clear yellow liquid with an aromatic odour. It is a highly flammable and reactive chemical, and the liquid and vapour are combustible. It is an extremely versatile chemical cross-linking agent used to improve polymer properties. It consists of a combination of meta and para isomers of DVB and ethylvinylbenzene and can be used as a monomer for the preparation of linear polydivinylbenzene by anionic polymerization.
Uses
Used in Adhesives Industry:
Divinylbenzene is used as a cross-linking agent for improving the high-temperature strength of adhesives used to bond aluminum to aluminum.
Used in Plastics Industry:
Divinylbenzene is used in the production of cross-linked polystyrene resins, which are used in the manufacturing of plastics.
Used in Elastomers Industry:
Divinylbenzene has been used in Styrene-Butadiene copolymers (SBR) as adhesives and as processing aids in the extrusion of general purpose rubbers. Rubbers used as impact modifiers such as Methacrylate-Butadiene-Styrene (MBS) have been improved with the inclusion of Divinylbenzene.
Used in Ceramics Industry:
Divinylbenzene is used in the manufacture of ceramics.
Used in Biological Materials Industry:
Divinylbenzene is used in the production of biological materials.
Used in Coatings Industry:
Divinylbenzene has been reported to improve surface properties of rubber goods for biomedical applications and is used in photocurable protective coatings for wood, metal, glass, and plastic materials.
Used in Catalysts Industry:
Divinylbenzene is used in the production of catalysts.
Used in Membranes Industry:
Divinylbenzene is used in the manufacturing of membranes.
Used in Pharmaceuticals Industry:
Divinylbenzene is used in the production of pharmaceuticals.
Used in Specialty Polymers Industry:
Divinylbenzene is used in the production of specialty polymers.
Used in Ion Exchange Resins Industry:
Divinylbenzene is used as a reactive monomer in the production of ion exchange resins for domestic and industrial water softening. Ion-exchange resins are also used as solid acid catalysts for certain reactions, such as esterification.
Used in Construction Industry:
Divinylbenzene has found utility in cross-linked styrene/butadiene polymers used for caulks and mastics for the construction industry.
Used in Chromatography Industry:
Divinylbenzene has been used in the production of reversed-phase packings for liquid chromatography and highly cross-linked polystyrene packings for ion exchange chromatography.
Used in Synthetic Rubber Industry:
Divinylbenzene is used as a comonomer for the preparation of crosslinked polymers in the production of synthetic rubber, drying oils, and casting resins.
Used in Polyester Resins Industry:
Divinylbenzene is used as a reactive monomer in polyester resins and for the synthesis of highly crosslinked macroporous styrene.
Used in Petroleum Production Industry:
Divinylbenzene is used in petroleum production.
Used in Polymeric Core Shell Nanoparticles Industry:
Divinylbenzene is used in the synthesis of polymeric core shell nanoparticles.
Used in Synthesis of Monodisperse Poly Divinylbenzene Microspheres:
Divinylbenzene is used to synthesize monodispersed poly divinylbenzene microspheres.
Reference
F. C. Huang, C. H. Ke, C. Y. Kao, W. C. Lee, Preparation and application of partially porous poly(styrene‐divinylbenzene) particles for lipase immobilization, Journal of Applied Polymer Science, 2001, vol. 80, pp. 39-46
Teresa Norber-King, Toxicity Reduction and Toxicity Identification Evaluation for effluents, ambient waters, and other aqueous media, 2001, ISBN 1-880611-64-3
Air & Water Reactions
Flammable. Insoluble in water.
Reactivity Profile
Divinylbenzene may react vigorously with strong oxidizing agents. Can react exothermically with reducing agents (such as alkali metals and hydrides) to release gaseous hydrogen. May react exothermically with both acids and bases. May in the presence of various catalysts (such as acids) or initiators undergo exothermic polymerization. Inhibited by presence of an additive. When uninhibited violent polymerization may occur . Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.
Health Hazard
Divinyl benzene is an irritant of
eyes, nose, and mucous membranes.
Mild respiratory irritation occurred in
workers exposed to 0.4–4ppm divinyl
benzene. Mild irritation was also reported
from skin and eye contact.
Fire Hazard
Divinylbenzene is combustible.
Flammability and Explosibility
Notclassified
Safety Profile
Mildly toxic by ingestion.
An eye irritant. Combustible. When heated to
decomposition it emits acrid smoke and irritating
fumes.
Carcinogenicity
Divinyl benzene was weakly genotoxic in
vivo, inducing a dose-dependent increase in
sister chromatid exchanges and an increase
in the frequency of chromosome aberrations in
male mice exposed at concentrations of up to
75ppm for 3 days.
The 2003 ACGIH threshold limit valuetime-
weighted average (TLV-TWA) for divinyl
benzene is 10ppm (53mg/m3).
Purification Methods
Purify divinylbenzene by dissolving in Et2O, shaking with H2O, drying over CaCl2, filtering, evaporating and distilling in vacuo. It polymerises within 2-3days unless 4-tertbutylcatechol (0.05%) is added as stabilizer. [Fries & Bestian Chem Ber 69 715 1936, Beilstein 5 III 1366.]
Check Digit Verification of cas no
The CAS Registry Mumber 1321-74-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,2 and 1 respectively; the second part has 2 digits, 7 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1321-74:
(6*1)+(5*3)+(4*2)+(3*1)+(2*7)+(1*4)=50
50 % 10 = 0
So 1321-74-0 is a valid CAS Registry Number.
InChI:InChI=1/2C10H10/c1-3-9-5-7-10(4-2)8-6-9;1-3-9-6-5-7-10(4-2)8-9/h2*3-8H,1-2H2
