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Safranina O soluzione for Gram staining, Sigma-Aldrich®

Fornitore: Merck
Attenzione

Synonyms: CI 50240

M-Clarity™ quality level = MQ300

1.09217.0500 1.09217.2500
1.09217.0500EA 47.6 EUR
1.09217.0500 1.09217.2500
Safranina O soluzione for Gram staining, Sigma-Aldrich®
Safranina O

Counterstain for Gram staining


The Gram staining allows a fast differentiation of bacteria in Gram-positive and Gram-negative. The mureine structure of the bacteria walls is the basis of the color affinity. Bacteria will be stained with Gram's crystal violet solution - an aniline dye - in the first step. After the treatment with iod solution (Lugol’s solution), a dye-iod complex will form. During the decolorizing step, this complex stays in the multilayer mureine structures of the Gram-positive bacteria and they will appear blue. Gram-negative bacteria have a monolayer mureine structure only, the dye-iod complex does not stay bound to the cellwall, they will be decolorized . Gram-negative bacteria will be counterstained by Gram's safranin solution and appear orange. A bottle with 500 ml Gram's safranin solution is sufficient for staining up to 250 slides, it is also available as part of the Gram-color stain set. It is an IVD product and CE registered.

Formula: C₂₀H₁₉ClN₄
Peso molecolare: 350,85 g/mol
Densità: 0,98 g/cm3 (20 °C)
Flash Pt: 49 °C
Temperatura di stoccaggio: Ambiente
MDL Number: MFCD00011759
CAS Number: 477-73-6
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Risultati del test di specificazione

Suitability for microscopy passes test
gram-positve microorganisms blue-violet
gram-negative microorganisms pink to red

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