Shanghai Nianxing Industrial Co., Ltd
China
Product Name: Diazene,1-(4-nitrophenyl)-2-phenyl-
Price: Check
Purity: 90.0%
Stocking Period: 10 Day
Contact: Yang
Email: sales@echemcloud.com

Dayang Chem (Hangzhou) Co., Ltd.
China
Product Name: Diazene,1-(4-nitrophenyl)-2-phenyl-
Price: $Inquiry/100g $Inquiry/1kg $Inquiry/100kg $Inquiry/1000kg
Purity: 98.0%
Stocking Period: Inquiry
Contact: Ms Wang
Email: enquiry@dycnchem.com

2491-52-3

2491-52-3 structure

2491-52-3 structure

Name: Diazene,1-(4-nitrophenyl)-2-phenyl-
Chemical Name: 4-Nitroazobenzene
CAS Number: 2491-52-3
Molecular Formula: C₁₂H₉N₃O₂
Molecular Weight: 227.21900
Create Date: 2018-09-08 16:57:09
Modify Date: 2025-08-25 19:50:39

Name	4-Nitroazobenzene
Synonyms	(4-nitrophenyl)-phenyldiazene EINECS 219-656-6 MFCD00007309

Density	1.23g/cm3
Boiling Point	392.9ºC at 760mmHg
Melting Point	132-134ºC(lit.)
Molecular Formula	C₁₂H₉N₃O₂
Molecular Weight	227.21900
Flash Point	191.4ºC
Exact Mass	227.06900
PSA	70.54000
LogP	4.53340
Vapour Pressure	5.02E-06mmHg at 25°C
Index of Refraction	1.62

CHEMICAL IDENTIFICATION

RTECS NUMBER :: CN2710000

CHEMICAL NAME :: Azobenzene, 4-nitro-

CAS REGISTRY NUMBER :: 2491-52-3

LAST UPDATED :: 199410

DATA ITEMS CITED :: 3

MOLECULAR FORMULA :: C12-H9-N3-O2

MOLECULAR WEIGHT :: 227.24

WISWESSER LINE NOTATION :: WNR DNUNR

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

MUTATION DATA

TYPE OF TEST :: Mutation in microorganisms

TEST SYSTEM :: Bacteria - Salmonella typhimurium

DOSE/DURATION :: 100 nmol/plate

REFERENCE :: GANNA2 Gann. Japanese Journal of Cancer Research. (Tokyo, Japan) V.1-75, 1907-84. For publisher information, see JJCREP. Volume(issue)/page/year: 72,921,1981

Symbol	GHS07, GHS08
Signal Word	Warning
Hazard Statements	H302 + H312 + H332-H315-H319-H335-H351
Precautionary Statements	P261-P280-P305 + P351 + P338
Personal Protective Equipment	Eyeshields;full-face particle respirator type N100 (US);Gloves;respirator cartridge type N100 (US);type P1 (EN143) respirator filter;type P3 (EN 143) respirator cartridges
Hazard Codes	Xn: Harmful;
Risk Phrases	20/21/22-36/37/38-40
Safety Phrases	S26;S27;S36/S37/S39
RIDADR	NONH for all modes of transport
RTECS	CN2710000
HS Code	2927000090

Precursor 9
60-09-3 4504-08-9 13921-68-1 1227476-15-4
637-62-7 100-01-6 586-96-9 4485-08-9
64-19-7
DownStream 6
100-01-6 13921-68-1 60-09-3 34139-26-9
60592-47-4 3646-57-9

HS Code	2927000090
Summary	2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

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