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Amino Acids & Derivatives

L-Cysteine, 99%+

BiochemistryAvailable on request

Order L-Cysteine, 99%+ (CAS 52-90-4) online at Zemixal. Request a quote with price, lead time and documents. Part of our Amino Acids & Derivatives range.

Pack sizes
L-Cysteine, 99%+ chemical structure
CAS number52-90-4
FormulaC3H7NO2S
Molar mass121.16 g/mol
Physical formCrystalline
HS code29309040
Purity≥99%
InChIKeyXUJNEKJLAYXESH-REOHCLBHSA-N
IUPAC name(2R)-2-amino-3-sulfanylpropanoic acid

About L-Cysteine, 99%+

L-Cysteine, 99%+ is part of the Zemixal amino Acids & Derivatives range. For your records (Biochemistry), the material is defined by CAS 52-90-4, formula C3H7NO2S and molar mass 121.16 g/mol. It is described as white powder or crystal or chunks.

Typical applications

  • Peptide synthesis
  • Cell culture media
  • Biochemical research
  • Protein & peptide research

Storage and safety notes

It carries the GHS signal word Warning (H302, H315, H319 and H335), so wear gloves and eye protection and work with good ventilation.

Available as 5 g, 25 g, 100 g, 500 g and 5 kg. Larger or split packs can be arranged. Each lot travels with a batch certificate of analysis and a 16-section SDS. Request pricing online and we confirm availability, documentation and freight to your country.

Typical uses

  • Peptide synthesis
  • Cell culture media
  • Biochemical research
  • Protein & peptide research

Applications

Diagnostics, Life Science and BiotechResearch Labs and Universities

Specifications and identifiers

Specifications of L-Cysteine, 99%+
Product nameL-Cysteine, 99%+
Catalogue numberZX-002126
CAS number52-90-4
IUPAC name(2R)-2-amino-3-sulfanylpropanoic acid
Molecular formulaC3H7NO2S
Molar mass121.16 g/mol
Exact mass121.0197
GradeBiochemistry
Purity / assay≥99%
Physical formCrystalline
AppearanceWhite powder or crystal or chunks
XLogP3-2.5
H-bond donors / acceptors3 / 4
Topological polar surface area64.3 Ų
HS code29309040
InChIKeyXUJNEKJLAYXESH-REOHCLBHSA-N
SMILESC([C@@H](C(=O)O)N)S
PubChem CID5862
Synonyms(R)-2-Amino-3-mercaptopropionic acid, cysteine, Cystein, (R)-2-Amino-3-mercaptopropanoic acid, Thioserine, Half-cystine, L-(+)-Cysteine, beta-Mercaptoalanine, L-Cystein, L-Cys, Half cystine, 2-Amino-3-mercaptopropionic acid

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful

Signal word Warning

  • H302Harmful if swallowed
  • H315Causes skin irritation
  • H319Causes serious eye irritation
  • H335May cause respiratory irritation

Precautionary statements P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of L-Cysteine, 99%+
5 gQuoted on request
25 gQuoted on request
100 gQuoted on request
500 gQuoted on request
5 kgQuoted on request
25 kgQuoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about L-Cysteine, 99%+

Which CAS number identifies L-Cysteine, 99%+?
L-Cysteine, 99%+ is registered under CAS 52-90-4. You may also see it listed as (R)-2-Amino-3-mercaptopropionic acid, cysteine, Cystein. Our catalogue number for this item is ZX-002126.
What are the formula and molar mass of L-Cysteine, 99%+?
For L-Cysteine, 99%+, its formula is C3H7NO2S and its molar mass is 121.16 g/mol. The systematic (IUPAC) name is (2R)-2-amino-3-sulfanylpropanoic acid. InChIKey XUJNEKJLAYXESH-REOHCLBHSA-N lets you match it in any structure database.
What grade and pack sizes are available for L-Cysteine, 99%+?
This listing is Biochemistry grade with ≥99% purity. Standard packs are 5 g, 25 g, 100 g, 500 g, 5 kg, 25 kg. Larger quantities and custom packing can be quoted on request.
Which documents come with L-Cysteine, 99%+?
Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.
Can Zemixal ship L-Cysteine, 99%+ to my country?
Yes. Because L-Cysteine, 99%+ is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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