Resorufin ethyl ether

suitable for fluorescence, ≥95% (UV)

7-Ethoxy-3H-phenoxazin-3-one, Ethoxyresorufin, O7-Ethylresorufin
Empirical Formula (Hill Notation):
CAS Number:
Molecular Weight:
Beilstein/REAXYS Number:
MDL number:
PubChem Substance ID:
Pricing and availability is not currently available.

Quality Level


≥95% (UV)


223-225 °C (lit.)


DMF: soluble
DMSO: soluble
alcohols: soluble


λex 464 nm; λem 540 nm in methanol(lit.)
λex 571 nm; λem 585 nm in dealkylase(lit.)


suitable for fluorescence

storage temp.


SMILES string




InChI key


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7-Ethoxyresorufin (7-ER) is a substrate used in environmental toxicology studies to monitor ethoxyresorufin-O-deethylase catalytic activity in the EROD assay. The EROD assay monitors the induction of the xenobiotic-metabolizing enzyme cytochrome P-450 (CYP) 1A1 and is a widely used biomarker for exposure of wildlife to substances that bind the aryl hydrocarbon (Ah) receptor. It provides evidence of receptor-mediated induction of cytochrome P450-dependant monooxygenases (the CYP1A subfamily specifically) by xenobiotic chemicals.


Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

Dealkylase substrate for the microfluorimetric analysis of microsomal cytochrome P-450

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Markus Brinkmann et al.
Aquatic toxicology (Amsterdam, Netherlands), 128-129, 13-24 (2012-12-25)
Increasing frequency and intensity of flood events are major concerns in the context of climate change. In addition to the direct hydrological implications of such events, potential ecotoxicological impacts are of increasing interest. It is vital to understand mechanisms of...
J J Whyte et al.
Critical reviews in toxicology, 30(4), 347-570 (2000-08-24)
This review compiles and evaluates existing scientific information on the use, limitations, and procedural considerations for EROD activity (a catalytic measurement of cytochrome P4501A induction) as a biomarker in fish. A multitude of chemicals induce EROD activity in a variety...
J J Reiners et al.
Analytical biochemistry, 188(2), 317-324 (1990-08-01)
An assay was characterized that facilitated per-cell estimation of cytochrome P-450-dependent monooxygenase activities in whole-cell suspensions and cultures of murine epidermal keratinocytes (MEKs). 7-Ethoxycoumarin O-deethylase (7-ECD), 7-ethoxyresorufin O-deethylase (7-ERD), and 7-pentoxyresorufin O-deethylase (7-PRD) activities were monitored by fluorescent detection of...
Ahmad F Abdull Razis et al.
Archives of toxicology, 86(10), 1505-1514 (2012-05-31)
As the Ah receptor target gene products play a critical role in chemical carcinogenesis, antagonists are considered as potential chemopreventive agents. It is demonstrated in this paper that the isothiocyanates R,S-sulforaphane and erucin are non-competitive antagonists of the aryl hydrocarbon...
J R Petrulis et al.
Environmental toxicology, 16(2), 177-184 (2001-05-08)
The ethoxyresorufin-O-deethylase (EROD) assay monitors the induction of the xenobiotic-metabolizing enzyme cytochrome P-450 (CYP) 1A1 and is a widely used biomarker for exposure of wildlife to substances that bind the aryl hydrocarbon (Ah) receptor. In this work the induction of...

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