Technical Data
ImmunoTek™ ABTS Stable Liquid Substrate 1.46mM for HRPO
Molecular Biology Storage: RT/4°CShipping: RT
ImmunoTek™ ABTS Stable Liquid Substrate 1.46mM for HRPO

ABTS is a soluble, safe, convenient, and good overall performing substrate for horseradish peroxidase (HRP) based ELISA assays. ABTS develops an intense blue-green color measurable between 405nm and 410nm. It may be used for both kinetic and endpoint reactions.
ABTS (1.46mM) is supplied in citrate buffer, pH 4.0.

In the presence of hydrogen peroxide and HRP, ABTS is oxidized to a radical cation showing absorption maxima at 820nm, 734nm, 650nm, and 405nm. The latter frequency demonstrates a significant molar extinction coefficient and is generally employed for most ABTS assays.

Stopping the reaction with acid does not alter the 405nm spectrum allowing kinetic and endpoint methods to be measured at the same wavelength.

Using a proprietary, nontoxic stabilization technology, United States Biological provides a room temperature stable, single component ABTS solution satisfactory for quantitative analysis of HRP based systems.

• Single component system
• Room temperature stable
• Exhibits low background levels
• Safe to use-no weighing of hazardous powders
• Save preparation time-use right out of the bottle
• Ultra-low sensitivity
• Minimal lot-to-lot variation
Clear to very pale green

Absorbance Check
(Spectrophotometry): 300-900nm scan.

pH: 4.0 ± 0.05

Supplied as a liquid in a citrate buffer, pH 4.0.

Storage and Stability:
May be stored at RT or at 4ºC. Stable for 12 months after receipt at 4ºC.

Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
1. Achanta, K., et al., J. Dairy Sci. 90: 90-98 (2007).

Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.