Description
Rose Bengal B (C.I. 45440) is a microscopy dye supplied for biological staining applications, with CAS number 632-69-9, EG nr. 211-183-3, and empirical formula C₂₀H₂Cl₄I₄Na₂O₅. The molar mass is 1017,65 g/mol and the density is 1 g/cm³, supporting accurate preparation of staining solutions in histology and related laboratory work. Rose Bengal B is widely used where selective staining behaviour is needed for microscopic examination of tissues and cellular structures. Available from manufacturer Carl ROTH, the material is positioned among dyes for biological applications and integrates readily into established staining protocols. Laboratories can use for stock solution preparation, method development, and day-to-day microscopy staining without unnecessary reformulation. Clear identity data—including CAS, EG number, and formula—facilitate documentation, ordering, and quality control in regulated or research microscopy environments.
This article is part of Dehydrated culture media (agar & broth bases), in Culture media & microbiology. See also Petri dishes.
Key features
- Maximum absorption: 540-555 nm
- Loss on drying (110 °C): ≤10 %
- CAS number: 632-69-9
- Pack sizes: 50 g, 5 g, 25 g
- EG nr.: 211-183-3
- Empirical formula: C₂₀H₂Cl₄I₄Na₂O₅
- Density: 1 g/cm³
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Rose Bengal B (C.I. 45440), for microscopy, 5 g, glass
What is this article?
Rose Bengal B (C.I. 45440), for microscopy, 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Dehydrated culture media (agar & broth bases), inside Culture media & microbiology, in Life Science & Microbiology.
A dehydrated medium is a powder the laboratory dissolves, sterilises and pours. The formulation name, the supplements it still needs, and the grams per litre are the specification. Two powders with similar names, one selective and one not, grow different organisms.
A culture medium is the food and the solid or liquid home of a microorganism. Dehydrated media are powders the laboratory dissolves and sterilises. Ready-to-use plates and tubes are already that. A Petri dish is the plate. Selective media let one kind of organism grow and hold another back. The formulation and the supplements, not the colour of the agar, are the specification. Reference strains are at ATCC. Methods are on PubMed. Biosafety practice is the WHO laboratory biosafety topic.
Which category should I open next?
The category is Culture media & microbiology. The sub-category is Dehydrated culture media (agar & broth bases). The catalogue is Life Science & Microbiology.
Shelves beside this one are Petri dishes, Ready-to-use culture media (plates, tubes, bottles), Microbiology (other), Inoculation loops, spreaders & needles and Microbial identification, hygiene monitoring & rapid tests.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.