Description
Esculin sesquihydrate is a biochemical-grade glycoside supplied at min. 97,5 % purity according to DAB specifications for laboratory and microbiology work. It carries CAS number 66778-17-4, EG number 208-517-5, the empirical formula C₁₅H₁₆O₉ · 1,5 H₂O, a molar mass of 367,31 g/mol and a density of 1,52 g/cm³. This crystalline material is widely used as a nutrient-media additive and substrate in life-science and microbiological assays that rely on esculin hydrolysis. is filled in glass for secure handling and storage on the bench. Produced by manufacturer Carl ROTH, the reagent supports reproducible preparation of selective media and related biochemical protocols without unnecessary formulation complexity. Clear identity data and defined purity make it straightforward to integrate into existing SOPs for media preparation, enzyme activity checks and teaching laboratory exercises.
This article is part of Moisture analysers, in Balances & scales.
Key features
- Appearance: white powder
- Assay (HPLC): ≥97.5 %
- pH value (1 % in H2O): 3.8-4.5
- Water (KF): 6.5-8.0 %
- Sulphated ash: ≤0.1 %
- Heavy metals (as Pb): ≤0.002 %
- Specific rotation [α]20D (1,5 % dioxane/H2O 1:1, dry substance): -87° to -84°
- Related substances: complies
- CAS number: 66778-17-4
- Pack sizes: 5 g, 25 g, 50 g, 100 g
- EG nr.: 208-517-5
- Purity: min. 97,5 %, DAB
- Molar mass: 367,31 g/mol
- Density: 1,52 g/cm³
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Esculin Sesquihydrate, min. 97,5 %, DAB, for biochemistry, 5 g, glass
What is this article?
Esculin Sesquihydrate, min. 97,5 %, DAB, for biochemistry, 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Moisture analysers, inside Balances & scales, in Lab instruments.
A moisture analyser is a balance with a halogen or infrared heater. It records the loss of mass as a sample dries and reports that loss as moisture. The temperature program and the sample mass decide whether the number is water or is decomposition.
A balance compares a mass with a standard. An analytical balance reads to 0.1 mg or finer and needs a draft shield and a stable bench. A precision balance is coarser and faster. A platform scale takes a heavier load. The reading is only as good as the calibration chain back to the kilogram, which is why test weights and a certificate exist. A moisture analyser is a balance with a heater: it records the loss of mass as water leaves. The unit of mass is kept by the BIPM, compared across Europe by EURAMET, and accredited by BELAC. NIST publishes the same measurement foundations.
Which category should I open next?
The category is Balances & scales. The sub-category is Moisture analysers. The catalogue is Lab instruments.
Shelves beside this one are Calibration & test weights, Precision balances, Balance accessories, calibration & certificates, Bench, platform & industrial scales and Analytical balances.
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.
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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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.