Skip to Content
Merck
All Photos(2)

Key Documents

View All Documentation

39255

Sigma-Aldrich

4-Dimethylamino-4′-nitrostilbene

≥99.8% (T)

Synonym(s):

N,N-Dimethyl-4′-nitro-4-stilbenamine, DANS

Sign Into View Organizational & Contract Pricing
All Photos(2)

About This Item

Linear Formula:
(CH3)2NC6H4CH=CHC6H4NO2
CAS Number:
2844-15-7
Molecular Weight:
268.31
Beilstein:
1379389
MDL number:
MFCD00041877
UNSPSC Code:
12352108
PubChem Substance ID:
57649889
NACRES:
NA.32

Assay

≥99.8% (T)

form

solid

mp

256-259 °C (lit.)
256-259 °C

fluorescence

λex 500 nm; λem ~700 nm in methylene chloride

SMILES string

CN(C)c1ccc(\C=C\c2ccc(cc2)[N+]([O-])=O)cc1

InChI

1S/C16H16N2O2/c1-17(2)15-9-5-13(6-10-15)3-4-14-7-11-16(12-8-14)18(19)20/h3-12H,1-2H3/b4-3+

InChI key

NVLSIZITFJRWPY-ONEGZZNKSA-N

Looking for similar products? Visit Product Comparison Guide

Application

4-Dimethylamino-4′-nitrostilbene (DANS, DMANS) may be used as a proton/acid indicator and physical chemistry probe to study state energy and photoexcitation dynamics of molecules.

Other Notes

Standard for the correction of emission of fluorescence spectrometers

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Customers Also Viewed

Slide 1 of 4

1 of 4

Coumarin 7 98%

Sigma-Aldrich

416541

Coumarin 7

Perylene sublimed grade, ≥99.5%

Sigma-Aldrich

394475

Perylene

Coumarin 153 Dye content 99 %

Sigma-Aldrich

546186

Coumarin 153

Zeaxanthin analytical standard

Supelco

14681

Zeaxanthin

Charles A Schmuttenmaer
Science progress, 85(Pt 2), 175-197 (2002-09-10)
The direct measurement of intramolecular electron transfer through detection of the electromagnetic (EM) waveform that is emitted during this process is reviewed. The waveform is detected in the time-domain via free-space electro-optic sampling and then related to the dynamics of
Antonio Barbon et al.
Physical chemistry chemical physics : PCCP, 8(43), 5069-5078 (2006-11-09)
Two dyes (4-nitrostilbene, NST and 4-N,N-dimethylamino-4'-nitrostilbene, DANS) included in zeolites with nanometric channels and different Si : Al ratios have been photoexcited and their triplet state studied by time resolved EPR (TR-EPR). This is the first time that a TR-EPR
E. Lippert et al.
Z. Anal. Chem., 170, 1-1 (1959)
Takakazu Nakabayashi et al.
Journal of the American Chemical Society, 127(19), 7041-7052 (2005-05-12)
External electric field effects on state energy and photoexcitation dynamics have been examined for para-substituted and unsubstituted all-trans-diphenylpolyenes doped in a film, based on the steady-state and picosecond time-resolved measurements of the field effects on absorption and fluorescence. The substitution
I D Petsalakis et al.
The journal of physical chemistry. A, 114(17), 5580-5587 (2010-04-14)
A theoretical investigation on the electronic structure of 4-dimethylamino-4'-nitrostilbene (DANS), 4-(dicyanomethylene)-2-methyl-6-p-(dimethylamino) styryl-4H-pyran (DCM), and their protonated forms is presented in an effort to rationalize recent experimental results on the tuning of the emitted color of organic light-emitting diodes through photochemically
View All Related Papers

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service