Kristallviolett wässriger Ethanollösung primary stain for Gram staining, Sigma-Aldrich®

Lieferant: Merck
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Synonyms: Methylviolett 10B4-[4,4'-Bis(dimethylamino) benzhydrylidene]cyclohexa-2,5-dien-1-ylidene]dimethylammoniumchloridBasic Violet 3Methylrosanilin4,4',4''-Tri(dimethylamino)trityliumchloridMethylrosaniliumHexamethylen-p-rosanilinchloridMethylrosaniliumchloridHexamethyl-p-rosaniliniumchloridHexamethylviolettblaues PyoktaninCI 42555Gentianaviolett

1.09218.0500EA 42.4 CHF
1.09218.0500 1.09218.2500
Kristallviolett wässriger Ethanollösung primary stain for Gram staining, Sigma-Aldrich®
Kristallviolett

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 safranin solution and appear orange.

Formel: C₂₅H₃₀ClN₃
MW: 407,99 g/mol
Lager Temperatur: Raumtemperatur
MDL Number: MFCD00011750
CAS-Nummer: 548-62-9
UN: 1170
ADR: 3,III
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