Stabilizer & Preservative

Stabilizers and Preservatives are indispensable functional components in in vitro diagnostic (IVD) reagents, serving distinct yet complementary roles in ensuring the reliability and longevity of diagnostic tests.

Stabilizers are primarily responsible for maintaining the structural integrity and biological activity of critical reagent components, such as enzymes, antibodies, and antigens. They protect these sensitive molecules from degradation caused by physical and chemical stressors, including temperature fluctuations, pH shifts, and oxidation. Common stabilizers include sugars (e.g., trehalose), polyols (e.g., glycerol), and proteins (e.g., BSA), which work collectively to extend the reagent's shelf life and guarantee consistent analytical performance—throughout its stated validity period.

Preservatives,are antimicrobial agents designed to prevent microbial contamination (bacterial and fungal growth) in liquid reagents, especially in multidose containers. By inhibiting or killing microorganisms, preservatives safeguard reagent integrity, prevent changes in pH or turbidity, protect automated instrumentation from biofilm clogging, and ensure patient safety. Their role is crucial for maintaining reagent sterility during repeated use.

Application Area

Immunoassays
Protect the activity of key proteins such as antibodies, antigens, and enzymes, preventing reagent failure during storage.
Clinical Chemistry
Maintain the long-term stability of enzymes, substrates, and metabolite concentrations in calibrators and quality control materials.
Molecular Diagnostics
Prevent sample degradation and inhibit background nuclease activity during sample preservation and nucleic acid extraction.
Point-of-Care Testing (POCT)
Maintain the activity and stability of dried antibodies/antigens on test strips under long-term room temperature storage.
Hematology & Flow Cytometry
Act as sample stabilizers to preserve blood cell morphology and the expression of surface antigens (CD markers) during transport and storage.

Sodium benzoate, 99%

Product Information Product Name Sodium benzoate, 99% Brand Name J&K Product Number 259476 CAS 532-32-1 Molecular Formula C7H5NaO2 Molecular Weight 144.10 SDS Document View/Download Certificate of Analysis (COA) Search COA...

$10.00

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L-Proline, 99%

Product Information Product Name L-Proline, 99% Brand Name J&K Product Number 132204 CAS 147-85-3 Molecular Formula C5H9NO2 Molecular Weight 115.13 SDS Document View/Download Certificate of Analysis (COA) Search COA not...

$18.20

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2-Phenoxyethanol, 99%, reference material

Product Information Product Name 2-Phenoxyethanol, 99%, reference material Brand Name J&K Product Number 989824 CAS 122-99-6 Molecular Formula C8H10O2 Molecular Weight 138.17 Certificate of Analysis (COA) Search COA not found...

$10.00

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Methyl 4-hydroxybenzoate, 99%, reference material

Product Information Product Name Methyl 4-hydroxybenzoate, 99%, reference material Brand Name J&K Product Number 918012 CAS 99-76-3 Molecular Formula C8H8O3 Molecular Weight 152.15 Certificate of Analysis (COA) Search COA not...

$17.40

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4-Hydroxybenzoic acid, 99%

Product Information Product Name 4-Hydroxybenzoic acid, 99% Brand Name J&K Product Number 506842 CAS 99-96-7 Molecular Formula C7H6O3 Molecular Weight 138.12 SDS Document View/Download Certificate of Analysis (COA) Search COA...

$20.90

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Glycerol, 99%

Product Information Product Name Glycerol, 99% Brand Name J&K Product Number 262536 CAS 56-81-5 Molecular Formula C3H8O3 Molecular Weight 92.09 SDS Document View/Download Certificate of Analysis (COA) Search COA not...

$33.46

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Stabilizer & Preservative