Shanghai Nianxing Industrial Co., Ltd
China
Product Name: 4,4'-Diisocyanato-3,3'-dimethylbiphenyl
Price: Check
Purity: 98.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Shanghai Jizhi Biochemical Technology Co., Ltd
China
Product Name: 4,4'-Diisocyanato-3,3'-dimethylbiphenyl
Price: ￥798.0/100g ￥288.0/25g
Purity: 98.0%
Stocking Period: 2 Day
Contact: Liu jia
Email: 2130147988@qq.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: 3,3-Dimethyl-4,4'-biphenylene diisocyanate
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

Henan Tianfu Chemical Co., Ltd.
China
Product Name: 4,4'-Diisocyanato-3,3'-dimethyl-1,1'-biphenyl
Price: $Inquiry/1kg $Inquiry/25kg $Inquiry/1000kg $Inquiry/10ton
Purity: 99.0%
Stocking Period: Inquiry
Contact: Anson
Email: info@tianfuchem.com

91-97-4

91-97-4 structure

91-97-4 structure

Name: 4,4'-Diisocyanato-3,3'-dimethylbiphenyl
Chemical Name: 4,4'-Diisocyanato-3,3'-dimethyl-1,1'-biphenyl
CAS Number: 91-97-4
Molecular Formula: C₁₆H₁₂N₂O₂
Molecular Weight: 264.279
Catalog: API Nervous system medication Antiepileptic and anticonvulsant
Create Date: 2018-05-18 08:00:00
Modify Date: 2025-08-25 18:07:06

Name	4,4'-Diisocyanato-3,3'-dimethyl-1,1'-biphenyl
Synonyms	4,4'-Diisocyanato-3,3'-dimethylbiphenyl MFCD00019908 1,1'-Biphenyl, 4,4'-diisocyanato-3,3'-dimethyl- EINECS 202-112-7 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene

Density	1.1±0.1 g/cm3
Boiling Point	384.8±42.0 °C at 760 mmHg
Melting Point	70-72°C
Molecular Formula	C₁₆H₁₂N₂O₂
Molecular Weight	264.279
Flash Point	158.8±33.2 °C
Exact Mass	264.089874
PSA	58.86000
LogP	5.03
Vapour Pressure	0.0±0.9 mmHg at 25°C
Index of Refraction	1.583

CHEMICAL IDENTIFICATION

RTECS NUMBER :: DV3960000

CHEMICAL NAME :: 1,1'-Biphenyl, 4,4'-diisocyanato-3,3'-dimethyl-

CAS REGISTRY NUMBER :: 91-97-4

BEILSTEIN REFERENCE NO. :: 2743710

LAST UPDATED :: 199803

DATA ITEMS CITED :: 5

MOLECULAR FORMULA :: C16-H12-N2-O2

MOLECULAR WEIGHT :: 264.30

WISWESSER LINE NOTATION :: OCNR B1 DR C1 DNCO

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intravenous

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 56 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) Volume(issue)/page/year: NX#02412

TYPE OF TEST :: LD - Lethal dose

ROUTE OF EXPOSURE :: Unreported

SPECIES OBSERVED :: Mammal - species unspecified

DOSE/DURATION :: >5 gm/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: MTPEEI Meditsina Truda i Promyshlennaya Ekologiya. Industrial Medicine and Ecology. (Mezhdunarodnaya Kniga, ul.B. Yakimanka, 39 117049 Moscow, Russia) No.1- 1993- Volume(issue)/page/year: (7),37,1994

Hazard Codes	Xn
RTECS	DV3960000
HS Code	2929109000

16083-49-1 structure

16083-49-1

~91%

91-97-4 structure

91-97-4

Literature: Butler; Alper Chemical Communications, 1998 , # 23 p. 2575 - 2576

75-44-5 structure

75-44-5

612-82-8 structure

612-82-8

~%

91-97-4 structure

91-97-4

Literature: Justus Liebigs Annalen der Chemie, , vol. 562, p. 75,1114

Precursor 2
75-44-5 612-82-8
DownStream 1
3259-65-2

HS Code	2929109000
Summary	2929109000. other isocyanates. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

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