Sodium Azide, Extra Pure

Sodium Azide, Extra Pure is an inorganic compound used as a bacteriostatic agent for preservation of biological samples and dilute biological solutions. Antimicrobial activity prevents the propagation of undesired microorganisms that could compromise the stability or quality of the stored biological formulation. Sodium azide inhibits cytochrome oxidase, which is involved in cellular respiration. Through the inhibition of this enzyme, sodium azide can also inhibit microbial metabolism and, thus, limit the growth of contaminants. This bacteriostatic action makes it useful when biological solutions need to be protected while in storage.

It has one application in the stabilization of immunological reagents. Sodium azide, in suitable preparations, may help to control microbial contamination during longer term storage. The microbial control is important to prevent any unwanted microbial growth that may change the composition of biological reagents and, subsequently, their use. The product is supplied as a white-coloured powder. It has an assay of not less than 99.0%, providing a defined purity specification for the material. The specified impurity limits include chloride not more than 0.005%, sulphate not more than 0.005%, and lead not more than 0.0005%. These parameters help establish the chemical quality of the Extra Pure grade. Sodium azide shows how a chemical reagent can have a particular use beyond just being a chemical identity. This property is especially useful when working with biological solutions that can be contaminated and interfere with long-term storage or later steps in a process or subsequent analytical procedures.

The bacteriostatic activity must be evaluated according to the intended use and the formulation of the preserved product. For each application, the correct concentration, conditions of use, storage and validated laboratory methods must be followed. Sodium azide is a powerful antimicrobial chemical and should be handled with care. When weighing, processing, transferring and disposing, follow appropriate laboratory safety procedures. Reducing exposure and avoiding contact with incompatible materials is part of laboratory safety. Additionally, proper storage is necessary to ensure the quality of the reagent and its stability during application.

Sodium Azide, Extra Pure, with its defined purity profile and bacteriostatic properties is suitable for applications where the control of microbial contamination in biological preparations is an important requirement.