Beschrijving
Phenolphthalein (C.I. 764) ROTI®CALIPURE is a melting point standard specified for the interval 258–263 °C, intended for calibration and performance checks of melting-point instruments. It carries CAS number 77-09-8 and EG nr. 201-004-7, with empirical formula C₂₀H₁₄O₄ and a molar mass of 318,33 g/mol. Physical data from the manufacturer include a density of 1,3 g/cm³ and a boiling point above 450 °C, providing a clear physicochemical profile for laboratory records. The material is supplied in a 1 g pack as a dedicated melting-point reference within the ROTI®CALIPURE range from manufacturer Carl ROTH. Laboratories engaged in determination of physical properties can use this standard to verify high-temperature melting behaviour and instrument accuracy. Its defined melting range supports reproducible qualification of melting-point apparatus in analytical, quality-control and teaching settings. Choose this phenolphthalein reference when a documented high-melting organic standard is required for routine melting-point determination workflows.
This article is part of Spectroscopy & physical property standards, in Analytical standards & reference materials.
Key features
- Meniscus formation: 258-263 °C
- Complete liquefaction: 258-263 °C
- Measurement uncertainty: ±0,3 °C
- CAS number: 77-09-8
- Pack size: 1 g
- EG nr.: 201-004-7
- Empirical formula: C₂₀H₁₄O₄
- Molar mass: 318,33 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Phenolphthalein (C.I. 764) ROTI®CALIPURE, Melting point standard 258-263 °C, 1 g
What is this article?
Phenolphthalein (C.I. 764) ROTI®CALIPURE, Melting point standard 258-263 °C, 1 g is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Spectroscopy & physical property standards, inside Analytical standards & reference materials, in Chemicaliën.
These standards check a physical or optical measurement: a refractive-index liquid, a wavelength standard, a viscosity oil, a melting-point substance. The stated value and its uncertainty are the product. They are not general reagents.
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.
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The category is Analytical standards & reference materials. The sub-category is Spectroscopy & physical property standards. The catalogue is Chemicaliën.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Reference substances & reagents (other), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN) and Indicators & indicator solutions.
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