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425044 Sigma-Aldrich

Sodium hypochlorite solution

reagent grade, available chlorine 10-15 %



Related Categories Chemical Synthesis, Essential Chemicals, Hypochlorites, Oxidizing Agents, Research Essentials,
Quality Level   100
grade   reagent grade
vapor pressure   23.3 hPa ( 20 °C)
assay   10-15% chlorine basis (by Na2S2O3, titration)
form   liquid
composition   available chlorine, 10-15%
bp   111 °C
density   1.206 g/mL at 25 °C
storage temp.   2-8°C
SMILES string   [Na+].[O-]Cl
InChI   1S/ClO.Na/c1-2;/q-1;+1


General description

Efficacy of 2.5% sodium hypochlorite (NaOCl) solution as endodontic irrigant has been tested. It was reported as comparatively more efficient antimicrobial agent than 0.2% chlorhexidine gluconate solution. It has been proposed as tissue solvent. It has bactericidal properties. Effect of time and storage conditions on tissue-dissolving capacity of various concentrations of NaOCl have been evaluated. NaOCl is commonly used for the removal of bloom-forming or biofouling organisms. It has been proposed as algicidal agent.


Sodium hypochlorite is an oxidant used with catalytic TEMPO for oxidation of alcohols. It is generally used in the synthesis of sodium 3,3′-bis(sulfonato)-4,4′-bis(acetamido)azobenzene.

Towards greener solvents for the bleach oxidation of alcohols catalysed by stable N-oxy radicals


1 L in poly bottle

18 L in poly drum

250 mL in poly bottle

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Supplemental Hazard Statements 
UN 1791 8 / PGIII
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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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 or view 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 definition of available chlorine?
Available chlorine is a measure of the bleaching power of a substance. Available chlorine is defined as chlorine capable of releasing an equivalent amount of atomic oxygen according to the following reaction equations.Cl2 + 2OH- --> OCl- + Cl- + H2O (eqn. 1)HOCl --> HCl + O2 (eqn. 2)
How is available chlorine tested?
To analyze for available chlorine, a sample of sodium hypochlorite is added to a solution of potassium iodide in the presence of acid to liberate iodine.The liberated iodine is titrated with standardized sodium thiosulfate.
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