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Bromocresol Purple

Bromocresol purple or 5′,5″-dibromo-o-cresolsulfophthalein is a pH indicator which changes color from yellow (at low pH 5.2) to violet (above pH 6.8). It is mainly used as a fluorescent stain in yeast cells. It helps in dead cell count for cells with plasma membrane damage. Cells with proper cell membrane are not stained, while damaged cells are seen as blue-grey ghosts.

In microbiology Bromocresol Purple is used as a component in  Bromocresol Purple Lactose Agar. It is a differential, non-selective medium for use in enumerating bacteria in urine. It supports the growth of urinary pathogens and contaminants but prevents undue swarming of Proteus species due to its lack of electrolytes. The medium allows
the differentiation of the bacteria recovered into lactose fermenters and non-fermenters.

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Product Details

Category Analytical Reagents
Dyes, Stains & Indicators
Microbiology Products
Price Enquire
CAS Number 115-40-2
Formula C21H16Br2O5S
Molecular Weight 540.22
Purity Dye content min 87%
Appearance Grey to light pink to purple powder
Availability In Stock
Storage Conditions Room temperature
MSDS Data Sheet Click to download
MDL Number MFCD00011681
Harmonised Tariff 29349990

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