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5,10-tetraMethylindeno[2,1-a]indene

5,10-tetraMethylindeno[2,1-a]indene structure

CAS No.: 89057-44-3

Chemical Name:: 5,10-tetraMethylindeno[2,1-a]indene

Synonyms: 5,10-tetraMethylindeno[2,1-a]indene;1,2,5,10-Tetramethylindeno[2,1-a]indene;5,5,10,10-tetramethyl-Inden[2,1-a]Indene;5,5,10,10-tetramethylindeno[2,1-a]indene;5,5,10,10-TetraMethyl-5,10-dihydroindeno<2,1-a>inden;5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene;Indeno[2,1-a]indene, 5,10-dihydro-5,5,10,10-tetramethyl-

CBNumber:: CB62640396

Molecular Formula:: C20H20

Molecular Weight:: 260.37

MDL Number:: MFCD26403658

MOL File:: 89057-44-3.mol

Last updated:2025-07-24 18:13:54

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5,10-tetraMethylindeno[2,1-a]indene Properties

Melting point	214℃
Boiling point	343.6±42.0 °C(Predicted)
Density	1.10±0.1 g/cm3 (20 ºC 760 Torr)
storage temp.	Sealed in dry,Room Temperature

SAFETY

Risk and Safety Statements

Symbol(GHS)	GHS07
Signal word	Warning
Hazard statements	H317-H319
Precautionary statements	P280-P305+P351+P338

5,10-tetraMethylindeno[2,1-a]indene price

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
American Custom Chemicals Corporation	CHM0390496	5,5,10,10-TETRAMETHYL-5,10-DIHYDROINDENO[2,1-A]INDENE 95.00%	89057-44-3	5MG	$496.41	2021-12-16	Buy
AK Scientific	5743CU	5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene	89057-44-3	1g	$1835	2021-12-16	Buy
Crysdot	CD43000055	5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene 95+%	89057-44-3	1g	$1129	2021-12-16	Buy
Alichem	89057443	5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene	89057-44-3	1g	$1244.16	2021-12-16	Buy
Arctom	SY148053	5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene ≥95%	89057-44-3	1g	$1315	2021-12-16	Buy

Product number	Packaging	Price	Buy
CHM0390496	5MG	$496.41	Buy
5743CU	1g	$1835	Buy
CD43000055	1g	$1129	Buy
89057443	1g	$1244.16	Buy
SY148053	1g	$1315	Buy

5,10-tetraMethylindeno[2,1-a]indene Chemical Properties,Uses,Production

Synthesis

6543-29-9

74-88-4

89057-44-3

At about -78 °C, 2.04 g (10 mmol) of 5,10-tetrahydrodianaphthene (Intermediate I-3) and 37.5 mL (60 mmol) of n-butyllithium (1.60 M hexane solution) were gradually reacted in tetrahydrofuran. Subsequently, 3.8 mL (60 mmol) of iodomethane was added and the reaction mixture was stirred at room temperature for about 3 hours. Upon completion of the reaction, 5 mL of aqueous 1N hydrochloric acid was added to the mixture to quench the reaction. The organic phase was separated and the aqueous phase was extracted with dichloromethane (2 x 100 mL). The organic phases were combined and dried over magnesium sulfate, followed by evaporation of the solvent. The residue was separated and purified by silica gel column chromatography to afford 2.03 g of 5,10-tetramethyldiindene (Intermediate I-4) in 78% yield. The compound was characterized by mass spectrometry/fast atom bombardment mass spectrometry (MS/FAB). The calculated molecular weight of the molecular formula C20H20 was 260.37 and the measured value was 260.45.

References

[1] Patent: US2014/27721, 2014, A1. Location in patent: Paragraph 0127; 0131
[2] Patent: KR2016/56315, 2016, A. Location in patent: Paragraph 0197; 0198; 0205; 0206
[3] Patent: US9537104, 2017, B2. Location in patent: Page/Page column 77; 78; 79
[4] Patent: US2017/12205, 2017, A1. Location in patent: Paragraph 0223; 0230;0321

5,10-tetraMethylindeno[2,1-a]indene Preparation Products And Raw materials

Raw materials

INDENO[2,1-A]INDENE,5,10-DIHY Iodomethane Tetrahydrofuran n-Butyllithium Hexane

Hydrochloric acid

1of2

Preparation Products

5,10-tetraMethylindeno[2,1-a]indene Suppliers

Global( 42)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Springchem New Material Technology Co.,Limited	+86-021-62885108 +8613917661608	info@spring-chem.com	China	2068	57
ATK CHEMICAL COMPANY LIMITED	+undefined-21-51877795	ivan@atkchemical.com	China	33024	60
Shenzhen Nexconn Pharmatechs Ltd	+86-755-89396905 +86-15013857715	admin@nexconn.com	China	10406	58
Career Henan Chemica Co	+86-0371-86658258 +8613203830695	laboratory@coreychem.com	China	30230	58
Hefei Hirisun Pharmatech Co., Ltd	+8615056975894	shawn@hirisunpharm.com	CHINA	9911	58
Dayang Chem (Hangzhou) Co.,Ltd.	+86-0571-88938639 +8617705817739	info@dycnchem.com	China	52846	58
CD Chemical Group Limited	+8615986615575	info@codchem.com	China	20342	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418684 +8618949823763	sales@tnjchem.com	China	25356	58
Coresyn Pharmatech Co., Ltd.	+86-571-86626709 +86-18157142896	cbc@coresyn.com	China	9984	58
PT CHEM GROUP LIMITED	+86-85511178;	peter68@ptchemgroup.com	China	35425	58

Supplier	Advantage
Springchem New Material Technology Co.,Limited	57
ATK CHEMICAL COMPANY LIMITED	60
Shenzhen Nexconn Pharmatechs Ltd	58
Career Henan Chemica Co	58
Hefei Hirisun Pharmatech Co., Ltd	58
Dayang Chem (Hangzhou) Co.,Ltd.	58
CD Chemical Group Limited	58
Hefei TNJ Chemical Industry Co.,Ltd.	58
Coresyn Pharmatech Co., Ltd.	58
PT CHEM GROUP LIMITED	58

5,10-tetraMethylindeno[2,1-a]indene 5,5,10,10-TetraMethyl-5,10-dihydroindeno<2,1-a>inden 1,2,5,10-Tetramethylindeno[2,1-a]indene 5,5,10,10-Tetramethyl-5,10-dihydroindeno[2,1-a]indene 5,5,10,10-tetramethylindeno[2,1-a]indene 5,5,10,10-tetramethyl-Inden[2,1-a]Indene Indeno[2,1-a]indene, 5,10-dihydro-5,5,10,10-tetramethyl- 89057-44-3