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29539-03-5 Usage

Chemical Properties

Off-White Solid


5,6-Dihydroxyindoline hydrobromide is commonly used in the cosmetic industry for hair dye.


ChEBI: A member of the class of indoles that is indoline with hydroxy substituents at positions 5 and 6.

Check Digit Verification of cas no

The CAS Registry Mumber 29539-03-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,9,5,3 and 9 respectively; the second part has 2 digits, 0 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 29539-03:
135 % 10 = 5
So 29539-03-5 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017


1.1 GHS Product identifier

Product name leukoaminochrome

1.2 Other means of identification

Product number -

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:29539-03-5 SDS

29539-03-5Downstream Products

29539-03-5Relevant articles and documents

Anaerobic oxidation of dopamine by iron(III)

El-Ayaan, Usama,Herlinger, Erwin,Jameson, Reginald F.,Linert, Wolfgang

, p. 2813 - 2818 (1997)

Iron(III) [in the form of Fe(OH)2+] reacted reversibly in acid aqueous solution with dopamine, 2-(3,4-dihydroxyphenyl)ethylamine (H2LH+, in which the phenolic protons are written to the left of L) to give the complex ion Fe(LH)2+. This species then decomposed to yield iron(II) and a semiquinone, which in turn is oxidised further to a quinone. The latter cyclised to form leucodopaminochrome (indoline-5,6-diol), which was finally oxidised by iron(III) to pink dopaminochrome (6-hydroxy-3H-indol-5-one), presumably via another semiquinone. The rate of appearance and disappearance of the complex and of the ortho-quinone were separately followed by stopped-flow photometric methods. Mechanisms are proposed for the various steps and these are supported by measurements at varying ionic strengths. Rate constants for the reversible formation of the iron-dopamine complex have been evaluated [k1 = (2.09 ± 0.05) × 103 and k-1 = 23 ± 2 dm3 mol-1 s-1]. The rate of decomposition of the protonated complex to yield iron(II) and the semiquinone was established as k2 = 0.23 ± 0.02 s-1 and KMH = 33 ± 0.9 dm3 mol-1 [for the protonation of Fe(LH)2+]. The stability constant of the Fe(LH)2+ complex has been calculated (log K1M = 21.14) and εmax is 1260 dm3 mol-1 cm-1 at 700 nm. The effect of chloride on the rate of complex formation at low pH has been explained by the fact that FeCl2+ also reacts with dopamine (kCl = 148 ± 7 dm3 mol-1 s-1) to form the complex but that this is predominantly reversible via the non-chloride route at low pH values. The stability constant for FeCl2+ formation (a constant not readily accessible by standard methods) was extracted from the data (log K1Cl = 1.53). The rate of disappearance of the quinone enabled the ring-closure reaction (i.e. the formation of the indole) to be followed and the mechanism established. All measurements were carried out at 25°C in solutions of ionic strength 0.10 mol dm-3 (KNO3) except for ionic strength dependence studies.



Paragraph 0028; 0030; 0032; 0034-0035; 0047-0050; 0159-0161;, (2021/08/27)

In some embodiments, the present disclosure pertains to methods of detecting an analyte in a sample by associating the sample with an electrode that includes a metal-organic framework. After association, the redox properties of the electrode are evaluated. Thereafter, the presence or absence of the analyte in the sample is detected by correlating the redox properties of the electrode to the presence or absence of the analyte. In some embodiments, the present disclosure pertains to electrodes that include a metal-organic framework and an electrode surface. In particular embodiments of the present disclosure, the metal-organic framework is associated with the electrode surface. Additional embodiments of the present disclosure pertain to methods of making the electrodes of the present disclosure by associating a metal-organic framework with an electrode surface. In some embodiments, the methods of the present disclosure also include a step of mixing the metal-organic framework with a polymer.

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