Orange I

Orange I (α-Naphthol Orange) is an azo dye that can form a complex with Methylene blue (HY-14536) and cause fluorescence quenching. The equilibrium constant of the complex of Orange I and Methylene blue is 79900 mol-1·dm3. Orange I can change the absorption spectrum of itself and Methylene blue[1][2].

Product Specifications

CAS Number

[523-44-4]

Product Name Alternative

α-Naphthol Orange

UNSPSC

12171500

Hazard Statement

H302-H315-H319-H335

Target

Fluorescent Dye

Type

Dye Reagents

Related Pathways

Others

Field of Research

Others

Assay Protocol

https://www.medchemexpress.com/orange-i.html

Purity

86.26

Solubility

DMSO : 125 mg/mL (ultrasonic)

Smiles

O=S(C1=CC=C(N=NC2=C3C=CC=CC3=C(O)C=C2)C=C1)(O[Na])=O

Molecular Formula

C16H11N2NaO4S

Molecular Weight

350.32

Precautions

P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

References & Citations

[1]Yamamoto S, et al. Spectroscopic studies of the interaction between methylene blue-naphthol orange complex and anionic and cationic surfactants. Spectrochim Acta A Mol Biomol Spectrosc. 2007 Feb;66 (2) :302-6.|[2]Hamai S, et al. Inclusion complexes of cyclodextrins with methylene blue and α-naphthol orange and temperature dependence of the inclusion complexation in aqueous solutions[J]. Bulletin of the Chemical Society of Japan, 2002, 75 (1) : 77-84.