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DDAO
7-hydroxy-9H-(1,3-dichloro-9,9-dimethylacridin-2-one); CAS 118290-05-4
DDAO [7-hydroxy-9H-(1,3-dichloro-9,9-dimethylacridin-2-one)] is used as a calibration standard for DDAO-based enzyme substrates. It has pH-dependent red fluorescence with excitation close to the He-Ne red laser line 633 nm.
Chemical structure for DDAO [7-hydroxy-9H-(1,3-dichloro-9,9-dimethylacridin-2-one)] *CAS 118290-05-4*
Chemical structure for DDAO [7-hydroxy-9H-(1,3-dichloro-9,9-dimethylacridin-2-one)] *CAS 118290-05-4*
CatalogSize
Price
Quantity
6225 mg
Price
 
Physical properties

Molecular weight308.16
SolventDMSO
Spectral properties

Extinction coefficient (cm -1 M -1)
40000
1
Excitation (nm)648
Emission (nm)658
Storage, safety and handling

Certificate of OriginDownload PDF
H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
StorageFreeze (< -15 °C); Minimize light exposure
UNSPSC12171501
CAS118290-05-4
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Page updated on October 13, 2025