Description
McFarland PMS 0,5 is a ready-to-use turbidity standard prepared for microbiology and related optical density work. Supplied as one unit in tube format, it supports visual or instrumental comparison when adjusting microbial suspensions to a defined McFarland level. Physical data include a density of 1,01 g/cm³ and a boiling point of 100 °C, consistent with an aqueous reference preparation used at the bench. Laboratories apply McFarland standards in environmental analysis, water and wastewater testing, and routine culture work where turbidity measurement guides inoculum preparation. This McFarland PMS 0,5 standard from manufacturer Carl ROTH fits workflows that require a stable, single-tube reference rather than freshly prepared barium sulfate suspensions. The compact pack (approximately 0,035 kg) is convenient for quality-control stations and teaching or service laboratories. Use the tube as an external visual or photometric reference according to your validated method; do not treat it as a culture medium or analytical reagent beyond turbidity comparison.
This article is part of Reference substances & reagents (other), in Analytical standards & reference materials.
Key features
- Turbidity (625 nm, 1 cm cuvette): 0,5 MFU
- Pack size: 1 pc, tube
- Density: 1,01 g/cm³
- Boiling point: 100 °C
- Storage temperature: +15 to +25 °C
- Product type: McFarland turbidity standard 0,5
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about McFarland PMS 0,5, for microbiology, 1 unit(s), tube
What is this article?
McFarland PMS 0,5, for microbiology, 1 unit(s), tube is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Reference substances & reagents (other), inside Analytical standards & reference materials, in Lab chemicals.
A reference substance has a stated identity and a stated content, used to check a method or to standardise a titration. It is a more tightly specified article than a reagent grade bottle of the same name. The lot's certificate is part of the product.
A reference material is the article against which another result is compared. Its value is stated, and the uncertainty of that value is part of the product. An ICP or ion standard is a solution of known concentration. A volumetric standard is for titration. A chromatography standard is the peak you match. The grade names, including pharmacopoeia and ASTM, say which impurities were limited. Identity is checked on PubChem. Names follow IUPAC. Medicinal grades follow the European Pharmacopoeia and USP.
Which category should I open next?
The category is Analytical standards & reference materials. The sub-category is Reference substances & reagents (other). The catalogue is Lab chemicals.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN), Spectroscopy & physical property standards and Indicators & indicator solutions.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
