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Indeno[2,1-a]indene, also known as 1H-indeno[2,1-a]indene, is a polycyclic aromatic hydrocarbon (PAH) with the molecular formula C19H14. It is a colorless to pale yellow crystalline solid that is insoluble in water but soluble in organic solvents. Indeno[2,1-a]indene(6CI,7CI,8CI,9CI) is a member of the indenoindene family, which are characterized by their fused ring structures. Indeno[2,1-a]indene is of interest in chemical research due to its unique electronic properties and potential applications in materials science. It is synthesized through various methods, including the condensation of naphthalene with acetylene, and is used as a precursor in the production of other complex organic compounds. Due to its structural complexity and potential environmental impact, studies on its toxicity and environmental fate are also of importance.

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  • 248-58-8 Structure
  • Basic information

    1. Product Name: Indeno[2,1-a]indene(6CI,7CI,8CI,9CI)
    2. Synonyms: 1.2,4.5-Dibenzpentalene;Dibenzo[b,f]pentalene; Diphensuccinda-9,11-diene
    3. CAS NO:248-58-8
    4. Molecular Formula: C16H10
    5. Molecular Weight: 202.255
    6. EINECS: N/A
    7. Product Categories: N/A
    8. Mol File: 248-58-8.mol
    9. Article Data: 3
  • Chemical Properties

    1. Melting Point: N/A
    2. Boiling Point: N/A
    3. Flash Point: N/A
    4. Appearance: N/A
    5. Density: N/A
    6. Refractive Index: N/A
    7. Storage Temp.: N/A
    8. Solubility: N/A
    9. CAS DataBase Reference: Indeno[2,1-a]indene(6CI,7CI,8CI,9CI)(CAS DataBase Reference)
    10. NIST Chemistry Reference: Indeno[2,1-a]indene(6CI,7CI,8CI,9CI)(248-58-8)
    11. EPA Substance Registry System: Indeno[2,1-a]indene(6CI,7CI,8CI,9CI)(248-58-8)
  • Safety Data

    1. Hazard Codes: N/A
    2. Statements: N/A
    3. Safety Statements: N/A
    4. WGK Germany:
    5. RTECS:
    6. HazardClass: N/A
    7. PackingGroup: N/A
    8. Hazardous Substances Data: 248-58-8(Hazardous Substances Data)

248-58-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 248-58-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,4 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 248-58:
(5*2)+(4*4)+(3*8)+(2*5)+(1*8)=68
68 % 10 = 8
So 248-58-8 is a valid CAS Registry Number.

248-58-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name indeno[2,1-a]indene

1.2 Other means of identification

Product number -
Other names Indenoindene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:248-58-8 SDS

248-58-8Downstream Products

248-58-8Relevant articles and documents

Intramolecular behaviors of anthryldicarbenic systems: Dibenzo[b,f]pentalene and, 1H,5H-dicyclobuta[de,kl]anthracene

Kendall,Shechter

, p. 6643 - 6649 (2007/10/03)

9,10-Bis[methoxy(trimethylsilyl)methyl]anthracenes (24), synthesized from 9,10-dilithioanthracene (26) and bromomethoxytrimethylsilylmethane (27, 2 equiv), decompose (550-650 °C/10-3 mmHg) carbenically to dibenzo[b,f]pentalene (28, >48%). 9,10-Anthryldicarbenes 39 or their equivalents convert to pentalene 28 rather than di-peri-cyclobutanthracenes 30 and 31, benzobiphenylene 32, or extended rearrangement products 33-38. Formation of 28 from 24 raises questions with respect to the behavior of 1,3,4,6-cycloheptatetraenyl-1-carbenes 49, 2,4,5,7-cyclooctatetraenylidene 51, 2,5,7-cyclooctatriene-1,4-diylidene 52, 1,2,4,5,7-cyclooctapentaene 53, and bicyclo[4.1.0]heptatrienyl-1-carbenes 54 and to carbon-skeleton and hydrogen rearrangements of anthryldicarbenes 39 and/or their equivalents at various temperatures. 1,5-Bis[methoxy(trimethylsilyl)methyl]anthracenes (25), prepared from 1,5-diiodoanthracene (63) and methoxytrimethylsilylmethylzinc bromide (57, 2 equiv) as catalyzed by PdCl2(PPh3)2, yield the di-peri-carbenic reaction product 1H,5H-dicyclobuta[de,kl]anthracene (30, >40%) on pyrolysis at 550-650 °C/10-3 mmHg. Proof of structure and various aspects of the mechanisms of formation of 30 are discussed.

Phenyl migrations in dehydroaromatic compounds. A new mechanistic link between alternant and nonalternant hydrocarbons at high temperatures

Preda, Dorin V.,Scott, Lawrence T.

, p. 1489 - 1492 (2007/10/03)

(Matrix presented) Flash vacuum pyrolysis of benzo[b]biphenylene, an alternant polycyclic aromatic hydrocarbon (PAH), gives fluoranthene, a nonalternant PAH, as the major product at 1100 °C in the gas phase. The most reasonable mechanism to explain this isomerization involves equilibrating diradicals of 2-phenylnaphthalene that rearrange by the net migration of a phenyl group to give equilibrating diradicals of 1-phenylnaphthalene, one isomer of which then cyclizes to fluoranthene.

The ethyne-ethylidene rearrangement: Formation of indeno[2,1-α]indene and fluoranthene on flash vacuum pyrolysis of 1,4-diphenylbutadiyne

Brown,Eastwood,Wong

, p. 3607 - 3608 (2007/10/02)

Diphenylbutadiyne on flash vacuum pyrolysis at 1120√0.03 Torr gave a pyrolysate (22% mass recovery) consisting of the diyne (7%), indeno[2,1-a]indene (19%), fluoranthene (59%), acephenanthrylene (13%) and aceanthrylene (2%). It is proposed that indeno[1,2-a]indene is formed via 3-phenyl-1,2-didehydronaphthalene and fluoranthene via 1-phenyl-2,3-didehydronaphthalene.

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