ABTS is a radical cation and a peroxidase substrate. It is used to assess antioxidant capacity in the Trolox equivalent antioxidant capacity (TEAC) assay. It is blue in the presence of sodium persulfate or metmyoglobin but decolorizes upon incubation with antioxidants, and the antioxidant capacity can be determined spectrophotometrically. ABTS has also been used as an enzyme substrate in ELISAs. Upon incubation with a peroxidase, it produces a soluble green product that can be quantified by colorimetric detection at 405 nm.

Product information

CAS Number: 30931-67-0

Molecular Weight: 548.68

Formula: C18H24N6O6S4

Synonym:

AzBTS-(NH4)2

Chemical Name: 3-ethyl-2-[2-(3-ethyl-6-sulfo-2,3-dihydro-1,3-benzothiazol-2-ylidene)hydrazin-1-ylidene]-2,3-dihydro-1,3-benzothiazole-6-sulfonic acid amine

Smiles: N.N.CCN1/C(=N\N=C2\SC3=CC(=CC=C3N\2CC)S(O)(=O)=O)/SC2=CC(=CC=C12)S(O)(=O)=O

InChiKey: OHDRQQURAXLVGJ-HLVWOLMTSA-N

InChi: InChI=1S/C18H18N4O6S4.2H3N/c1-3-21-13-7-5-11(31(23,24)25)9-15(13)29-17(21)19-20-18-22(4-2)14-8-6-12(32(26,27)28)10-16(14)30-18;;/h5-10H,3-4H2,1-2H3,(H,23,24,25)(H,26,27,28);2*1H3/b19-17+,20-18+;;

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO : 20.83 mg/mL (37.96 mM; Need ultrasonic)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

References:

1. Matsuda H, et al. Evaluation of ELISA with ABTS, 2-2'-azino-di-(3-ethylbenzthiazoline sulfonic acid), as the substrate of peroxidase and its application to the diagnosis of schistosomiasis. Jpn J Exp Med. 1984 Jun;54(3):131-8.
2. Lauber C, et al. Identification, heterologous expression and characterization of a dye-decolorizing peroxidase of Pleurotus sapidus. AMB Express. 2017 Aug 23;7(1):164.

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