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Benzocyclobutene

Benzocyclobutene structure

CAS No.: 694-87-1

Chemical Name:: Benzocyclobutene

Synonyms: BICYCLO[4.2.0]OCTA-1,3,5-TRIENE;Cardene;Benzocyclobutene (BCB);1,2-dihydrocyclobutabenzene;Bicyclo[4.2.0]octa-1(6),2,4-triene;BENZOCYCLOBUTENE;Benzocyclobutane;1,2-Ethenobenzene;Benzocyclobutadiene;2,3-Vinylenebenzene

CBNumber:: CB7663345

Molecular Formula:: C8H8

Molecular Weight:: 104.15

MDL Number:: MFCD01321219

MOL File:: 694-87-1.mol

MSDS File:: SDS

Last updated:2025-07-04 15:07:58

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Benzocyclobutene Properties

Boiling point	150 °C/748 mmHg (lit.)
Density	0.957 g/mL at 25 °C (lit.)
refractive index	n20/D 1.541(lit.)
Flash point	97 °F
storage temp.	Sealed in dry,Room Temperature
form	clear liquid
color	Colorless to Almost colorless
InChI	InChI=1S/C8H8/c1-2-4-8-6-5-7(8)3-1/h1-4H,5-6H2
InChIKey	UMIVXZPTRXBADB-UHFFFAOYSA-N
SMILES	C12C(CC1)=CC=CC=2
CAS DataBase Reference	694-87-1(CAS DataBase Reference)
FDA UNII	MF7U8F3YLB
NIST Chemistry Reference	Bicyclo[4.2.0]octa-1,3,5-triene(694-87-1)
EPA Substance Registry System	Bicyclo[4.2.0]octa-1,3,5-triene (694-87-1)
UNSPSC Code	12352100
NACRES	NA.22

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS08,GHS02

Signal word

Warning

Hazard statements

H226-H304

Precautionary statements

P210-P233-P240-P241+P242+P243-P280-P301+P310+P331-P303+P361+P353-P370+P378-P403+P235-P405-P501

Risk Statements

Safety Statements

RIDADR

UN 3295 3/PG 3

WGK Germany

HazardClass

PackingGroup

Ⅲ

HS Code

29029090

NFPA 704

	3
0		0

Benzocyclobutene price More Price(26)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	164410	Benzocyclobutene 98%	694-87-1	500mg	$163.8	2024-03-01	Buy
TCI Chemical	B3863	Benzocyclobutene >94.0%(GC)	694-87-1	1g	$126	2024-03-01	Buy
TCI Chemical	B3863	Benzocyclobutene >94.0%(GC)	694-87-1	200mg	$42	2024-03-01	Buy
TRC	B198290	Benzocyclobutene	694-87-1	5g	$495	2021-12-16	Buy
Frontier Specialty Chemicals	JK101327	Benzocyclobutene 95%	694-87-1	250mg	$155	2021-12-16	Buy

Product number	Packaging	Price	Buy
164410	500mg	$163.8	Buy
B3863	1g	$126	Buy
B3863	200mg	$42	Buy
B198290	5g	$495	Buy
JK101327	250mg	$155	Buy

Benzocyclobutene Chemical Properties,Uses,Production

Chemical Properties

Colorless liquid

Uses

Benzocyclobutene was used as the adhesive bonding material in adhesive wafer-level bonding technique. Photosensitive benzocyclobutene has been widely used as dielectric material in multilayer packaging applications. It was used in fabrication of high density multilayer interconnect structures using gold metallization and polymer interlayer dielectric.

Uses

Benzocyclobutene (BCB) is composed of a benzene ring fused to a cyclobutane ring (chemical formula C8H8). It is frequently used to create photosensitive polymers. BCB-based polymer dielectrics may be spun on various substrates, with good step coverage properties that make them useful to planarize uneven topographies. Applications include wafer bonding, optical interconnects, semihermetic package sealing, passivation, and low-k dielectrics. BCB has been also reported as a material with good biocompatibility, being used in intracortical neural implants and other biomedical applications.

Definition

ChEBI: A carbobicyclic compound that is benzene fused to a cyclobutane ring.

Synthesis Reference(s)

Journal of the American Chemical Society, 97, p. 5600, 1975 DOI: 10.1021/ja00852a057
The Journal of Organic Chemistry, 38, p. 3412, 1973 DOI: 10.1021/jo00959a039
Tetrahedron Letters, 16, p. 1893, 1975

Toxics Screening Level

The Initial Threshold Screening Level (ITSL) for benzocyclobutene is 220 μg/m3 with an annual averaging time.

Benzocyclobutene Preparation Products And Raw materials

Raw materials

Preparation Products

4-Aminobenzocyclobutene 1-Bromobenzocyclobutene 2,3-Benzodioxin (8CI,9CI) Bicyclo[4.2.0]octa-1,3,5-triene-3-carboxamide (7CI,8CI) Bicyclo[4.2.0]octa-1,3,5-triene, 3-(bromomethyl)-

5-nitro-1,2-dihydrocyclobutabenzene 4-Bromobenzocyclobutene

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Benzocyclobutene Suppliers

Global( 186)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Shanghai Qyubiotech Co., Ltd.	+86-086-021-37596619 +8618019359838	info@qyubiotech.com	China	307	58
Henan Fengda Chemical Co., Ltd	+86-371-86557731 +86-13613820652	info@fdachem.com	China	20202	58
Capot Chemical Co.,Ltd.	+8613336195806	sales@capot.com	China	29731	60
career henan chemical co	+86-0371-86658258 +8613203830695	sales@coreychem.com	China	29855	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22963	58
Alchem Pharmtech,Inc.	8485655694	sales@alchempharmtech.com	United States	63687	58
Antai Fine Chemical Technology Co.,Limited	18503026267	info@antaichem.com	CHINA	9636	58
Hebei Mujin Biotechnology Co.,Ltd	+86-13288715578	sales@hbmojin.com	China	12648	58
SIMAGCHEM CORP	+86-5922680277 +86-13806087780	sale@simagchem.com	China	17346	58
Hefei TNJ Chemical Industry Co.,Ltd.	+86-0551-65418671 +8618949823763	sales@tnjchem.com	China	34563	58

Supplier	Advantage
Shanghai Qyubiotech Co., Ltd.	58
Henan Fengda Chemical Co., Ltd	58
Capot Chemical Co.,Ltd.	60
career henan chemical co	58
Hubei xin bonus chemical co. LTD	58
Alchem Pharmtech,Inc.	58
Antai Fine Chemical Technology Co.,Limited	58
Hebei Mujin Biotechnology Co.,Ltd	58
SIMAGCHEM CORP	58
Hefei TNJ Chemical Industry Co.,Ltd.	58

View Lastest Price from Benzocyclobutene manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2025-07-07	benzocyclobutene 694-87-1	US $0.00 / KG	1KG	99%	50000KG/month	Hebei Mujin Biotechnology Co.,Ltd
2025-06-04	Bicyclo[4.2.0]octa-1,3,5-triene 694-87-1	US $0.00-0.00 / g	10g	98%+	10000kgs per Month	Shanghai Qyubiotech Co., Ltd.
2023-12-26	Benzocyclobutene 694-87-1	US $100.00-1.00 / KG	1KG	99%	g-kg-tons, free sample is available	Henan Fengda Chemical Co., Ltd

benzocyclobutene
694-87-1
US $0.00 / KG
99%
Hebei Mujin Biotechnology Co.,Ltd

Bicyclo[4.2.0]octa-1,3,5-triene
694-87-1
US $0.00-0.00 / g
98%+
Shanghai Qyubiotech Co., Ltd.

Benzocyclobutene
694-87-1
US $100.00-1.00 / KG
99%
Henan Fengda Chemical Co., Ltd

Benzocyclobutene Spectrum

Benzocyclobutene(694-87-1)¹HNMR Benzocyclobutene(694-87-1)¹³CNMR Benzocyclobutene(694-87-1)IR

694-87-1(Benzocyclobutene)Related Search:

Benzocyclobutene-4-boronic acid Benzocyclobutenone Bicyclo[4.2.0]octa-1,3,5-triene-7-carboxylic acid methyl ester 3-BROMO-BICYCLO[4.2.0]OCTA-1,3,5-TRIENE Ivabradine hydrochloride

Bicyclo[4.2.0]octa-1,3,5-triene-7-carboxylic acid,Bicyclo[4.2.0]octa-1,3,5-triene-7-carboxylic acid (6CI,7CI,8CI,9CI),1-carboxyl benzocyclobutene Bicyclo[4.2.0]octa-1,3,5-triene-7-carbonitrile Benzocyclobutene 4,5-Dimethoxy-1-cyanobenzocyclobutane 4-Carboxaldehydebenzocyclobutene

4-Vinylbenzocyclobutene 4-Hydroxymethylbenzocyclobutene Bicyclo[4.2.0]octa-1,3,5-triene-3-carboxylic acid (7CI,8CI,9CI),4-Carboxyl benzocyclobutene 1-Hydroxymethylbenzocyclobutene 1-Bromobenzocyclobutene

4a(2H)-Biphenylenol, 1,3,4,8b-tetrahydro-, cis- 1,6-BIS[3-(TRIFLUOROMETHYL)-3H-DIAZIRIN-3-YL]-3,8-DIMETHOXY-DIBENZENE 1-Bicyclo[4.2.0]octa-1,3,5-trien-7-ylmethanamine

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1,2-Dihydrobenzocyclobutene Benzocyclobutane Benzocyclobutene, 1,2-dihydro- BENZOCYCLOBUTENE Bicyclo[4.2.0]octa-2,4,6(1)-triene 1,2-Ethenobenzene 1,2-Vinylenebenzene 2,3-Vinylenebenzene Benzocyclobutadiene Benzocyclobutene,Bicyclo[4.2.0]octa-1,3,5-triene BICYCLO[4.2.0]OCTA-1,3,5-TRIEN Benzocyclobutene 98% BCB Benzocyclobutene Benzocyclobutene > Benzocyclobutene ISO 9001：2015 REACH Cardene BICYCLO[4.2.0]OCTA-1,3,5-TRIENE Bicyclo[4.2.0]octa-1(6),2,4-triene 1,2-dihydrocyclobutabenzene Benzocyclobutene (BCB) Bicyclo[4.2.0]octa-1,3,5-triene ，98% 694-87-1 Cyclic Organic Building Blocks Building Blocks Alkenes 1