D-Cysteine
Synonym(s):(S)-2-Amino-3-mercaptopropionic acid
- CAS NO.：921-01-7
- Empirical Formula: C3H7NO2S
- Molecular Weight: 121.16
- MDL number: MFCD00066461
- EINECS: 213-062-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-22 22:14:22
What is D-Cysteine?
Chemical properties
White crystalline powder
The Uses of D-Cysteine
D-Cysteine has been used in the functionalization of QDs for applications in photocatalysis.
It can also be used in the synthesis of:
- cysteine-based chiral carbon dots (CDs)
- D-luciferin and aminoluciferin analogs
What are the applications of Application
D-Cysteine is an unnatural isomer of cysteine
Definition
ChEBI: An optically active form of cysteine having D-configuration.
Purification Methods
Purify it by recrystallisation from H2O (free from metal ions) and dry it in a vacuum. It is soluble in H2O, EtOH, Me2CO, EtOAc, AcOH, *C6H6 and CS2. Acidic solutions can be stored under N2 for a few days without deterioration. [For synthesis and spectra see Greenstein & Winitz Chemistry of the Amino Acids (J. Wiley) Vol 3 p1879 1961, Beilstein 4 III 1618, 4 IV 3144.]
Properties of D-Cysteine
| Melting point: | ~230 °C (dec.) |
| Boiling point: | 293.9±35.0 °C(Predicted) |
| Density | 1.334±0.06 g/cm3(Predicted) |
| storage temp. | Keep in dark place,Inert atmosphere,2-8°C |
| solubility | Aqueous Acid (Slightly), Water (Slightly) |
| form | Crystalline Powder |
| pka | 2.07±0.10(Predicted) |
| color | White |
| optical activity | [α]20/D 7.6±1.0°, c = 5% in 5 M HCl |
| Water Solubility | Soluble in water (partly). |
| Sensitive | Air Sensitive |
| BRN | 1721407 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| CAS DataBase Reference | 921-01-7(CAS DataBase Reference) |
Safety information for D-Cysteine
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P330:Rinse mouth. |
Computed Descriptors for D-Cysteine
D-Cysteine manufacturer
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