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CS0790 Sigma-Aldrich

Antioxidant Assay Kit

sufficient for 200 tests



Preparation Note

Reagents are to be prepared with ultrapure water.


Myoglobin Solutions are to be stored at -20C after reconstitution.
Trolox Working Solution is to be stored at -20C after reconstitution.
ABTS Substrate Solution is to be stored at 4C for 2 weeks or at -20C for 1 month.


Antioxidant assay kit provides all of the reagents required for an efficient measurement of the total antioxidant capacity of plasma, serum, urine, saliva, cells, and tissue lysates. It has also been used to measure the radical cation (2,2′-azino-di-[3-ethylbenzthiazoline sulphonate]) (ABTS+) scavenging capacity.

It was tested on A431 and CHO cell lysates; rat brain, liver, and kidney lysates; human plasma, serum, urine, and saliva.


The principle of the antioxidant assay is formation of a ferryl myoglobin radical from metmyoglobin and hydrogen peroxide, which oxidizes the ABTS (2,2¢-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) to produce a radical cation, ABTS·+ , a soluble chromogen that is green in color and can be determined spectrophotometrically at 405 nm.

General description

Free radicals or reactive oxygen species (ROS) are produced during biochemical redox reactions as part of normal physiological cell metabolism (protection from infectious organisms) and as a response to environmental factors such as UV light, cigarette smoke, environmental pollutants, and g-radiation. Once formed, ROS attack cellular components causing damage to lipids, proteins, and DNA, which can initiate numerous diseases, including cancer, atherosclerosis, rheumatoid arthritis, diabetes, liver damage, and central nervous system disorders.


Suitable for the measurement of the total antioxidant capacity of plasma, serum, urine, saliva, cells, and tissue lysates

Kit component also available separately


Product #

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Hydrogen Peroxide, 3% solution 1 mL    
Myoglobin from horse heart 2 x 1 mg    
(±)-6-Hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (Trolox®) 2 x 1 mg    
ABTS, 10 mg tablets 4 tab    
Phosphate-Citrate Buffer, pH 5 4 tab    

Kit component only


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Assay Buffer 10X 30 mL    
Stop Solution 20 mL    
Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN 3316 9
WGK Germany 


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products.Once you log onto our website, you will find the price and availability displayed on the product detail page.You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 orview local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
What is the pH of kit component A3605 in the Antioxidant Assay Kit,product CS0790?
The pH ofkit component A3605 in the Antioxidant Assay Kit, product CS0790, is approximately 5,at 25°C. The adequacy/suitability of the pH of the assay buffer is assessed via the assay itself, and is tested for each lot of kits.
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