Description
PCB 4 is a defined polychlorinated biphenyl congener supplied as a ROTI®Star analytical standard for laboratory use. With CAS number 13029-08-8, empirical formula C₁₂H₈Cl₂ and a molar mass of 223,10 g/mol, this dichlorobiphenyl material underpins accurate identification and quantification in chromatographic assays. It is provided in a 25 mg glass pack, appropriate for calibration stock preparation, method optimisation and confirmatory work in gas chromatography. Environmental analysis groups depend on individual PCB congeners to establish retention behaviour, build multi-point calibrations and evaluate extraction efficiency in complex samples. PCB 4 from manufacturer Carl ROTH is well suited to congener-specific reference sets, proficiency-related preparations and routine GC monitoring of polychlorinated biphenyls. The clearly specified molecular data and manageable pack size facilitate controlled handling, accurate aliquoting and integration into quality-assured workflows that require discrete PCB standards rather than only technical mixtures.
This article is part of ICP, AAS & ion standards, in Analytical standards & reference materials.
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Questions about PCB 4, ROTI®Star, 25 mg, glass
What is this article?
PCB 4, ROTI®Star, 25 mg, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in ICP, AAS & ion standards, inside Analytical standards & reference materials, in Lab chemicals.
An ICP, AAS or ion standard is a solution of a stated element or ion at a stated concentration, with an uncertainty. It is the calibration point of a spectrometer or an electrode. The matrix, often dilute acid, has to match the method. A standard past its expiry is not that concentration.
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 ICP, AAS & ion standards. The catalogue is Lab chemicals.
Shelves beside this one are Chromatography standards (GC, HPLC, pesticides), Reference substances & reagents (other), 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.

