Buy Indigo® chlorine bleach (hypolchlorite) test strips for your disinfectant solution monitoring in food processing, water management, pharmaceuticals & public health care. We provide Certificates of Analysis & Stability & SDS Statements on-line; Certificates of Conformance on request.
Choose from 6 Indigo® chlorine bleach test strips for your specific disinfection & sanitizing needs. All Indigo® disinfectant/sanitizer test strips come with 100 test strips/vial and a minimum guaranteed 3 year shelf life (from date of manufacture). Our delivered costs beat "free" shipping"!
Optional next day delivery in any quantity of most items. Call us toll free at (877)746-4764 for immediate assistance (8-4 EST M-F). Emailed questions are typically answered within an hour.
Hypochlorite actively decomposes over time when exposed to either light or heat. It is often used in direct food-contact implications & is widely cited in recalls, sanitation deviations, and audit findings. Hence the need for frequent & accurate testing of concentration.
Indigo® chlorine test strips measure concentrations ranging from 0.5ppm to 10,000ppm high levels. Applications are wide ranging. They include: food & beverage processing; produce, seafood & post harvest processing; drinking water & wastewater operations; healthcare & institutional sanitation; pharmaceutical & biotech facilities; government, emergency response & public health.. Whatever your strength requirement for chlorine bleach/hypochlorite, Indigo® chlorine test strips can confirm your disinfectant solutions are correctly diluted for optimum effectiveness. Choose from the following for your application.
Note: All test strips Made in the USA & are Q/A'd against NIST standards.
(Real Reviews-Not AI Generated Fakes; Click on the name to view the source at Google.)
Roberta Vigil: Indigo Instruments defines the purpose for the test strips and places them in easy to recognize categories. They are also clear about what type/state of chlorine the strips test, which most sellers don’t make clear. The BONUS is the qty of strips in each vial (100 vs the typical 50), fast and consistently accurate all for a price that beats other sellers!
Ronald Rosenberg: I purchased Indigo Chlorine Test Strips 0-300ppm. The sales person I spoke with was excellent and I received the items exactly when she said I would. Best of all the product was excellent. There was a clear delineation of the colors on the test strip so you could differentiate the different ppm. I would definitely repurchase this item.
Helen Kees The quick and prompt service on my 0 to 10 ppm chlorine test strips is much appreciated. I loved the quality at a cost less than Amazon. But the real deal that drove me to leave a review was that I called back a week or so after receiving the product and asked for spec sheets requested by my organic inspector. I was treated like I had spent a million bucks and the info was at my fingertips within a minute. This kind of service is invaluable.
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Hypochlorites are the most commonly used of the chlorine based disinfectants, are fast acting & economical. Sodium hypochlorite (chlorine bleach) is strongly oxidizing with a broad range antimicrobial action that can disrupt or destroy bacterial cell membranes. This happens because cell walls of pathogenic microorganisms are negatively charged. Hypochlorite germicidal activity is directed towards important bacterial enzymes which in turn disrupts metabolic pathways. Effectiveness of hypochlorite (chlorine bleach) solutions are reduced in the presence of organic compounds such as blood and feces. Higher concentrations are often required to break down biofilms.
Hypochlorite ion (OCl-, shown in the image below) reacts with water to form hypochlorous acid (HOCl) that is the actual disinfecting compound. The amount of hypochlorous acid and hypochlorite together equals available or free chlorine. Its broad range of antimicrobial action is unaffected by water hardness. In high enough concentration, it can effect a 5-log reduction (99.999% inactivation) in pathogenic organisms in under 10 minutes.

Hypochlorite disinfectant structure model from Indigo® Instruments. Sodium or calcium ion not shown.
Follow precision chlorine test paper instructions for guaranteed accuracy with Indigo® Chlorine Test Strips
Note: All test strips Made in the USA & are Q/A'd against NIST standards.
Chlorine (sodium hypochlorite) is the most popular sanitizing/disinfecting chemical for hard surfaces especially where food is prepared. Iodine, also a halogen, is listed below but is used relatively rarely by comparison.
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Warning. Chlorine use in sanitation and disinfection has rare cases of serious toxicity but careful handling is nevertheless recommended. Fumes from undiluted household bleach can cause eye irritation. Ingestion can cause oropharyngeal, esophageal & gastric burns. Nitrile gloves, safety glasses and lab coat/apron are the minimum recommended PPE (personal protective equipment) for handling concentrated chlorine bleach.
Never mix chlorine bleach-sodium hypochlorite with ammonia based cleaners which can release toxic levels of ammonia and chlorine gas
Consult first aid instructions on bleach container & seek medical aid if necessary in the event a spill or mishap.