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3,3'-Dimethyl-4,4'-biphenylene diisocyanate

3,3'-Dimethyl-4,4'-biphenylene diisocyanate structure

CAS No.: 91-97-4

Chemical Name:: 3,3'-Dimethyl-4,4'-biphenylene diisocyanate

Synonyms: TODI;nacconate200;3,3'-DIMETHYL-4;-diyl diisocyanate;3,3'-Dimethyl-4,4'-b;tolidinediisocyanate;bitoluenediisocyanate;bitolylenediisocyanate;o-Tolidine diisocyanate;-dimethylbiphenyl-4,4'

CBNumber:: CB2485599

Molecular Formula:: C16H12N2O2

Molecular Weight:: 264.28

MDL Number:: MFCD00019908

MOL File:: 91-97-4.mol

MSDS File:: SDS

Last updated:2026-06-24 18:39:39

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3,3'-Dimethyl-4,4'-biphenylene diisocyanate Properties

Melting point	70-72°C
Boiling point	195-197°C (667 Pa)
Density	1.197 (80°C)
vapor pressure	0.003Pa at 25℃
refractive index	1.5800 (estimate)
Flash point	218°C
storage temp.	0-10°C
solubility	soluble in Toluene
form	pellet
color	White to Almost white
Water Solubility	594.08μg/L at 25℃
LogP	6.052 at 25℃
Indirect Additives used in Food Contact Substances	BITOLYLENE DIISOCYANATE
REACH Annex XVII Substances List	3,3'-dimethylbiphenyl-4,4'-diyl diisocyanate (91-97-4)
FDA 21 CFR	177.1680
CAS DataBase Reference	91-97-4(CAS DataBase Reference)
FDA UNII	9L950NB0HN
EPA Substance Registry System	3,3'-Dimethyl-4,4'-diphenylene diisocyanate (91-97-4)

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07,GHS08

Signal word

Danger

Hazard statements

H302+H312+H332-H315-H319-H334-H341

Precautionary statements

P201-P202-P261-P264-P270-P271-P280-P284-P301+P312+P330-P302+P352+P312+P362+P364-P304+P340+P312-P305+P351+P338+P337+P313-P308+P313-P405-P501

RTECS

DV3960000

TSCA

TSCA listed

HS Code

29291090

REACH Registrations

Active

NFPA 704

	1
2		0

3,3'-Dimethyl-4,4'-biphenylene diisocyanate price More Price(20)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	S360902	3,3'-DIMETHYL-4,4'-BIPHENYLENE DIISOCYANATE Aldrich^CPR	91-97-4	1 unit	$197	2026-04-30	Buy
Sigma-Aldrich	S360902	3,3'-DIMETHYL-4,4'-BIPHENYLENE DIISOCYANATE Aldrich	91-97-4	250mg	$179	2024-03-01	Buy
TCI Chemical	D2051	4,4'-Diisocyanato-3,3'-dimethylbiphenyl >98.0%(GC)	91-97-4	25g	$73	2026-04-30	Buy
TCI Chemical	D2051	4,4'-Diisocyanato-3,3'-dimethylbiphenyl >98.0%(GC)	91-97-4	250g	$434	2026-04-30	Buy
aablocks	AA003KCP	3,3′-Dimethylbiphenyl 4,4′-diisocyanate ≥98%	91-97-4	5g	$10	2026-05-28	Buy

Product number	Packaging	Price	Buy
S360902	1 unit	$197	Buy
S360902	250mg	$179	Buy
D2051	25g	$73	Buy
D2051	250g	$434	Buy
AA003KCP	5g	$10	Buy

3,3'-Dimethyl-4,4'-biphenylene diisocyanate Chemical Properties,Uses,Production

Uses

4,4''-Diisocyanato-3,3''-dimethylbiphenyl is used in preparation method of high-thixotropy single-component modified silane polymer sealant comprising thixotropic agent.

Reactivity Profile

Isocyanates and thioisocyanates, such as 3,3'-Dimethyl-4,4'-biphenylene diisocyanate, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].

Flammability and Explosibility

Not classified

Safety Profile

Poison by intravenous route. When heated to decomposition it emits toxic fumes of NOx. See also CYANATES and ESTERS.

3,3'-Dimethyl-4,4'-biphenylene diisocyanate Preparation Products And Raw materials

Raw materials

Preparation Products

3,3'-Dimethyl-4,4'-biphenylene diisocyanate Suppliers

Global( 214)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Suzhou Suosen New Material Technology Co., Ltd.	18357035212	757514698@qq.com	China	28	58
Tianjin Zhongxin Chemtech Co., Ltd.	022-66880623	sales@tjzxchem.com	China	612	60
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
3B Pharmachem (Wuhan) International Co.,Ltd.	18930552037	3bsc@sina.com	China	15813	69
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
Shanghai Hanhong Scientific Co.,Ltd.	021-54306202 13764082696	info@hanhongsci.com	China	42917	64
Shandong Xiya Chemical Co., Ltd	13355009207 13355009207	3007715519@qq.com	China	18722	57
China Langchem Inc.	0086-21-58956006		China	7798	57

Supplier	Advantage
Suzhou Suosen New Material Technology Co., Ltd.	58
Tianjin Zhongxin Chemtech Co., Ltd.	60
J & K SCIENTIFIC LTD.	76
Meryer (Shanghai) Chemical Technology Co., Ltd.	62
3B Pharmachem (Wuhan) International Co.,Ltd.	69
TCI (Shanghai) Development Co., Ltd.	81
Energy Chemical	61
Shanghai Hanhong Scientific Co.,Ltd.	64
Shandong Xiya Chemical Co., Ltd	57
China Langchem Inc.	57

View Lastest Price from 3,3'-Dimethyl-4,4'-biphenylene diisocyanate manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2026-08-31	3,3'-Dimethyl-4,4'-biphenylene diisocyanate 91-97-4	$1000.00	1kg	98	20mt	Henan Rane Chemical Co., Ltd.
2026-06-30	4,4`-Diisocyanato-3,3`-dimethylbiphenyl 91-97-4		1KG	98%	1000KG	Shaanxi Dideu New Materials Co. Ltd
2026-03-20	3,3'-Dimethyl-4,4'-biphenylene diisocyanate 91-97-4		1KG	99%	20 mt	Hebei Chuanghai Biotechnology Co., Ltd

3,3'-Dimethyl-4,4'-biphenylene diisocyanate
91-97-4
$1000.00
98
Henan Rane Chemical Co., Ltd.

4,4`-Diisocyanato-3,3`-dimethylbiphenyl
91-97-4
98%
Shaanxi Dideu New Materials Co. Ltd

3,3'-Dimethyl-4,4'-biphenylene diisocyanate
91-97-4
99%
Hebei Chuanghai Biotechnology Co., Ltd

3,3'-Dimethyl-4,4'-biphenylene diisocyanate Spectrum

3,3'-Dimethyl-4,4'-biphenylene diisocyanate(91-97-4)MS 3,3'-Dimethyl-4,4'-biphenylene diisocyanate(91-97-4)¹HNMR 3,3'-Dimethyl-4,4'-biphenylene diisocyanate(91-97-4)IR1 3,3'-Dimethyl-4,4'-biphenylene diisocyanate(91-97-4)IR2

91-97-4(3,3'-Dimethyl-4,4'-biphenylene diisocyanate)Related Search:

Tolylene-2,4-diisocyanate 4-Nitrotoluene-2-sulfonic Acid 2-Chlorotoluene 2-Nitrotoluene 4,4'-Dimethylbiphenyl

2-Bromotoluene Dimethyl ether Dimethyl phthalate Dimethyl fumarate Dimethyl sulfide

Isophorone diisocyanate Hexamethylene Diisocyanate 1,4-Phenylene diisocyanate o-Xylene Dimethyl sulfoxide

N,N-Dimethylformamide Ethane 4,4'-Methylenebis(phenyl isocyanate)

1of4

3,3'-BITOLYENE-4,4'-DI-ISO-CYANATE 3,3'-BITOLYLENE-4,4'-DIISOCYANATE 3,3'-DIMETHYLBIPHENYL-4,4'-DIYL DIISOCYANATE 3,3'-DIMETHYLDIPHENYL-4,4'-DI-ISO-CYANATE 3,3'-DIMETHYL-4,4'-BIPHENYLENEIISOCYANATE 4,4’-biorthotolylenediisocyanate 4,4’-diisocyanato-3,3’-dimethyl-1,1’-biphenyl 4,4’-diisocyanato-3,3’-dimethyl-1’-biphenyl bitoluenediisocyanate bitolylenediisocyanate 1-isocyanato-4-(4-isocyanato-3-methyl-phenyl)-2-methyl-benzene 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene 3,3'-Dimethyl-4,4'-b 3,3'-DIMETHYL-4 3,3-Dimethyl-4,4'-Diphenyl Diisocyanate 3,3'-Dimethyl-4,4'-biphenylene diisocyate isocyanicacid,3,3’-dimethyl-4,4’-biphenyleneester isocyanicacid,3,3’-dimethyl-4,4’-biphenylyleneester nacconate200 tolidinediisocyanate 4,4'-Diisocyanato-m,m'-bitolyl o-Tolidine diisocyanate dimethyl-biphenyl diisocyanate 3,3'-ditolylene-4,4'-diisocyanate 33DIMETHYL44DIPHENYLENEDIISOCYANATE 3,3'-Dimethylbiphenyl-4,4'-Diyldiiso-Cyanate (TODI) (3,3'-Dimethyl-1,1'-biphenyl-4,4'-diyl)diisocyanate (3,3'-Dimethyl-4,4'-biphenylylene)bisisocyanate 3,3'-Dimethyl-1,1'-biphenyl-4,4'-diyldiisocyanate 3,3'-Dimethyl-4,4'-diisocyanatobiphenyl 3,3'-Dimethyl-4,4'-biphenyl diisocyanate 7-[5-[fluoro(methyl)phosphoryl]oxypentyl]-4-nitro-2,1,3-benzoxadiazole 4,4'-Diisocyanato-3,3'-dimethylbiphenyl> 4,4'-Diisocyanato-3,3'-dimethyL 4,4'-Diisocyanato-3,3'-dimethyl-1,1'-bipheny O-tolidine diisocyanate TODI 4，4‘-Diisocyanato-3，3‘-dimethylbiphenyl， ≥ 98.0% 4,4'-Diisocyanato-3,3'-dimethylbiphenyl 4,4'-Diisocyanato-3,3'-dimethyl-1,1'-biphenyl 3,3'-Dimethyl-4,4'-biphenylene diisocyanate N,N'-(3,3'-dimethylbiphenyl-4,4'-ylene)di(acetoacetamide) 3,3'-Dimethyl-4,4'-biphenylene diisocyanate 3,3'-dimethylbiphenyl-4,4'-diyl diisocyate -dimethylbiphenyl-4,4' -diyl diisocyanate Dimethyl diphenyl diisocyanate TODI 91-97-4 CH3OCNC6H32 CH3C6H42NCO2 ISOCYANATE Biphenyls (for High-Performance Polymer Research) Reagent for High-Performance Polymer Research other Biphenyls (for High-Performance Polymer Research) Functional Materials Reagent for High-Performance Polymer Research