Description
L-Cysteine is a sulfur-containing amino acid of empirical formula C₃H₇NO₂S and CAS number 52-90-4, offered at a minimum purity of 98 % in DAB quality for biochemistry. The solid has a molar mass of 121,16 g/mol and a density of 1,496 g/cm³, providing clear physicochemical reference points for weighing and solution preparation. Identification is completed by EG number 200-158-2, aiding regulatory and inventory documentation. Supplied from manufacturer Carl ROTH, L-cysteine is widely used as a building block, reducing agent precursor and nutritional or metabolic intermediate in life-science laboratories. The glass pack protects the material during storage and dispensing on the analytical balance. Researchers can employ it in enzyme assays, cell-culture supplements, synthetic routes and quality-control standards that demand consistent purity and documented identity. Its well-specified molar mass and density facilitate accurate stock solutions and stoichiometric calculations in routine biochemical workflows.
This article is part of Moisture analysers, in Balances & scales.
Key features
- Appearance: white, cryst. powder
- Appearance of solution: clear and colorless
- Assay: 98.0-101.0 %
- pH-value: 4.5-5.5
- Specific rotation [α]20D: +8.3° to +9.5°
- Loss on drying: ≤0.5 %
- Ash content (as SO4): ≤0.05 %
- Foreign amino acids: complies
- Chloride (Cl): ≤0.04 %
- Sulphate (SO4): ≤0.028 %
- CAS number: 52-90-4
- Pack sizes: 10 g, 50 g, 250 g
- EG nr.: 200-158-2
- Purity: min. 98 %, DAB
- Empirical formula: C₃H₇NO₂S
- Molar mass: 121,16 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about L-Cysteine, min. 98 %, DAB, for biochemistry, 10 g, glass
What is this article?
L-Cysteine, min. 98 %, DAB, for biochemistry, 10 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?
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.