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1-Methyl-1-cyclohexene

1-Methyl-1-cyclohexene structure

CAS No.: 591-49-1

Chemical Name:: 1-Methyl-1-cyclohexene

Synonyms: 1-METHYLCYCLOHEXENE;1-METHYLCYCLOHEX-1-ENE;1-methyl-cyclohexen;1-Methylcyclohexene-1;cyclohexene,1-methyl-;1-methyl-1-cyclohexane;2-METHYLCYCLOHEXENE;1-Methyl-1-cyclohexene;alpha-Methylcyclohexene;2,3,4,5-TETRAHYDROTOLUENE

CBNumber:: CB3470604

Molecular Formula:: C7H12

Molecular Weight:: 96.17

MDL Number:: MFCD00001548

MOL File:: 591-49-1.mol

MSDS File:: SDS

Last updated:2026-09-12 18:52:04

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1-Methyl-1-cyclohexene Properties

Melting point	-119.4°C
Boiling point	110-111 °C (lit.)
Density	0.811 g/mL at 20 °C (lit.)
vapor pressure	27.4 at 20.2 °C, 36.4 at 25.0 °C (transpiration method, Verevkin et al., 2000)
refractive index	n20/D 1.45(lit.)
Flash point	25 °F
storage temp.	Sealed in dry,Room Temperature
solubility	Soluble in benzene and ether (Weast, 1986) and miscible with many hydrocarbons similar in chemical structure, e.g., cyclohexane, cyclohexene, etc.
form	Liquid
color	Clear colorless
Odor	at 1.00 % in dipropylene glycol. lime citrus
Odor Type	citrus
Water Solubility	52 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966)
BRN	1304483
Henry's Law Constant	8.86 x 10^-2 atmm³/mol at 25 °C (approximate - calculated from water solubility and vapor pressure)
Stability	Stable, but may be prone to polymerization. May be stabilized by the addition of around 10 ppm hydroquinone. Highly flammable. Incompatible with strong oxidizing agents.
InChI	1S/C7H12/c1-7-5-3-2-4-6-7/h5H,2-4,6H2,1H3
InChIKey	CTMHWPIWNRWQEG-UHFFFAOYSA-N
SMILES	CC1=CCCCC1
LogP	3.333 (est)
CAS DataBase Reference	591-49-1(CAS DataBase Reference)
FDA UNII	TE4P8Q2044
EPA Substance Registry System	Cyclohexene, 1-methyl- (591-49-1)
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS02,GHS07,GHS08

Signal word

Danger

Hazard statements

H225-H304-H315

Precautionary statements

P210-P233-P240-P301+P310-P303+P361+P353-P331

PPE

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter

Hazard Codes

F,Xn,Xi

Risk Statements

11-36/37/38-65

Safety Statements

16-26-36-62

RIDADR

UN 3295 3/PG 2

WGK Germany

Hazard Note

Irritant

TSCA

TSCA listed

HazardClass

PackingGroup

HS Code

29021900

Storage Class

3 - Flammable liquids

Hazard Classifications

Asp. Tox. 1
Flam. Liq. 2
Skin Irrit. 2

Limited Quantities

1.0 L (0.3 gallon) (liquid)

Excepted Quantities

Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml)

NFPA 704

	3
1		0

1-Methyl-1-cyclohexene price More Price(38)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	129801	1-Methyl-1-cyclohexene 97%	591-49-1	5g	$56.2	2026-04-30	Buy
Sigma-Aldrich	129801	1-Methyl-1-cyclohexene 97%	591-49-1	25g	$150	2026-04-30	Buy
TCI Chemical	M0200	1-Methyl-1-cyclohexene >98.0%(GC)	591-49-1	25mL	$97	2026-04-30	Buy
TCI Chemical	M0200	1-Methyl-1-cyclohexene >98.0%(GC)	591-49-1	100mL	$292	2026-04-30	Buy
Biosynth	FM166072	1-Methyl-1-cyclohexene	591-49-1	0.1kg	$900	2026-06-04	Buy

Product number	Packaging	Price	Buy
129801	5g	$56.2	Buy
129801	25g	$150	Buy
M0200	25mL	$97	Buy
M0200	100mL	$292	Buy
FM166072	0.1kg	$900	Buy

1-Methyl-1-cyclohexene Chemical Properties, Uses, Production

Chemical Properties

colourless liquid

Physical properties

Clear, colorless, very flammable, watery liquid with a characteristically unpleasant, aromatic hydrocarbon-type odor.

Uses

1-Methyl-1-cyclohexene (2,3,4,5-Tetrahydrotoluene) was used to study the secondary organic aerosol (SOA) yields from the ozonolysis of cycloalkenes.

Synthesis Reference(s)

The Journal of Organic Chemistry, 45, p. 917, 1980 DOI: 10.1021/jo01293a030

General Description

1-Methyl-1-cyclohexene (2,3,4,5-Tetrahydrotoluene) is a sterically hindered, unactivated alkene.

Environmental Fate

Photolytic. Atkinson (1985) reported a rate constant of 9.45 x 10^-11 cm³/moleculesec for the reaction of 1-methylcyclohexene with OH radicals in the atmosphere.

Purification Methods

Free it from hydroperoxides by passing through a column containing basic alumina or refluxing with cupric stearate, filter and fractionally distil it from sodium. [Vogel J Chem Soc 1332 1938, Cope et al. J Am Chem Soc 79 4729 1957, Beilstein 5 III 197, 5 VI 245.]

1-Methyl-1-cyclohexene synthesis

Synthesis of 1-Methyl-1-cyclohexene from Methylmagnesium chloride and Cyclohexanone

1-Methyl-1-cyclohexene Preparation Products And Raw materials

Raw materials

Methanone, (1-methylcyclohexyl)phenyl- 1,3-Dimethylcyclohexene 1,2,3-Trimethylcyclopentene 3,5-Dimethylcyclopentene 1,2-Dimethylcyclopentene

1,5-Dimethylcyclopentene 1,2-Dimethyl cyclohexene 3,3-dimethylcyclopentene 1-Ethyl-1-cyclopentene Methylenecyclohexane

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Preparation Products

trans-2-Methylcyclohexanol 1-methyl-7-oxabicyclo[4.1.0]heptane

1-Methyl-1-cyclohexene Suppliers

Global Suppliers ( 162)

Supplier	Tel	Email	Country	ProdList	Advantage
BTC Pharmaceutical CO. Ltd	+86-15716293042 15716293042	info@btcpharm.com	China	823	55
J & K SCIENTIFIC LTD.	18210857532 18210857532	jkinfo@jkchemical.com	China	96815	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	4006356688 18621169109	market03@meryer.com	China	40202	62
Alfa Aesar	400-6106006	saleschina@alfa-asia.com	China	30103	84
TCI (Shanghai) Development Co., Ltd.	021-67121386	Sales-CN@TCIchemicals.com	China	24512	81
Energy Chemical	400-0056266	sales8178@energy-chemical.com	China	44850	61
Shandong Xiya Chemical Co., Ltd	13355009207 13355009207	3007715519@qq.com	China	18722	57
Syntechem Co.,Ltd		info@syntechem.com	China	12973	57
Tianjin heowns Biochemical Technology Co., Ltd.	400 638 7771	sales@heowns.com	China	14412	57
Sinopharm Chemical Reagent Co,Ltd.	86-21-63210123	sj_scrc@sinopharm.com	China	9791	79

Supplier	Advantage
BTC Pharmaceutical CO. Ltd	55
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
Alfa Aesar	84
TCI (Shanghai) Development Co., Ltd.	81
Energy Chemical	61
Shandong Xiya Chemical Co., Ltd	57
Syntechem Co.,Ltd	57
Tianjin heowns Biochemical Technology Co., Ltd.	57
Sinopharm Chemical Reagent Co,Ltd.	79

View Latest Price from 1-Methyl-1-cyclohexene manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-09-02	1-METHYL-1-CYCLOHEXENE 591-49-1	$1.00-100.00	1KG	99%		Henan Fengda Chemical Co., Ltd
2026-06-30	1-METHYL-1-CYCLOHEXENE 591-49-1		1kg	99%	10000KGS	Shaanxi Dideu New Materials Co. Ltd
2024-02-26	1-METHYL-1-CYCLOHEXENE 591-49-1		1kg	97%		BTC Nantong Pharmaceuticals Technology Co.,Ltd

1-METHYL-1-CYCLOHEXENE
591-49-1
$1.00-100.00
99%
Henan Fengda Chemical Co., Ltd

1-METHYL-1-CYCLOHEXENE
591-49-1
$0.00
99%
Shaanxi Dideu New Materials Co. Ltd

1-METHYL-1-CYCLOHEXENE
591-49-1
97%
BTC Nantong Pharmaceuticals Technology Co.,Ltd

1-Methyl-1-cyclohexene Spectrum

1-METHYL-1-CYCLOHEXENE(591-49-1)MS 1-METHYL-1-CYCLOHEXENE(591-49-1)¹HNMR 1-METHYL-1-CYCLOHEXENE(591-49-1)¹³CNMR 1-METHYL-1-CYCLOHEXENE(591-49-1)FT-IR 1-METHYL-1-CYCLOHEXENE(591-49-1)Raman 1-METHYL-1-CYCLOHEXENE(591-49-1)IR

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1-Methylcyclohexene-1 alpha-Methylcyclohexene 2,3,4,5-TETRAHYDROTOLUENE 2-METHYLCYCLOHEXENE 1-METHYL-1-CYCLOHEXENE: TECH., 75% 1-METHYL-1-CYCLOHEXENE 98+% 1-Methyl-1-cyclohexene, 98+%, stabilized 1-Methyl-1-cyclohexene, stabilized 1-Methyl-1-cyclohexene, stabilized, 98+% 10GR 1-Methyl-1-cyclohexene, stabilized, 98+% 1-methyl-1-cyclohexane 1-Methyl-1-cyclohexene 97% 1-Methyl-1-cyclohexene> 1-METHYL-1-CYCLOHEXENE ISO 9001：2015 REACH 1-Methyl-1-cyclohexene, tech.75% tianfu-chem_591-49-1// 1-Methyl-1-cyclohexene, stabilized, 98+% 1-methyl-cyclohexen 1-METHYLCYCLOHEXENE 1-METHYLCYCLOHEX-1-ENE cyclohexene,1-methyl- 1-Methyl-1-cyclohexene 591-49-1 C6H9CH3 Building Blocks Alkenes Organic Building Blocks Cyclic Alkenes Building Blocks Chemical Synthesis Cyclic Organic Building Blocks