L(+)-allo-Threonine
Synonym(s):(2S,3S)-2-Amino-3-hydroxybutyric acid
- CAS NO.：28954-12-3
- Empirical Formula: C4H9NO3
- Molecular Weight: 119.12
- MDL number: MFCD00064268
- EINECS: 249-327-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-10-13 18:16:27
What is L(+)-allo-Threonine?
Chemical properties
white to off-white crystalline powder
The Uses of L(+)-allo-Threonine
L-allo-Threonine is a reactant used in the synthesis of an antibiotic, globomycin, and its congener, SF-1902 A5.
Definition
ChEBI: L-allothreonine is the L-enantiomer of allothreonine. It has a role as an Escherichia coli metabolite and a Saccharomyces cerevisiae metabolite. It is an allothreonine and a L-alpha-amino acid. It is an enantiomer of a D-allothreonine. It is a tautomer of a L-allothreonine zwitterion.
Properties of L(+)-allo-Threonine
| Melting point: | 272 °C (dec.)(lit.) |
| Boiling point: | 222.38°C (rough estimate) |
| alpha | 9 º (c=2, H2O) |
| Density | 1.3126 (rough estimate) |
| refractive index | 10 ° (C=5, H2O) |
| storage temp. | Keep in dark place,Sealed in dry,Room Temperature |
| solubility | Water (Slightly) |
| form | Crystalline Powder |
| pka | pK1: 2.108(+1);pK2: 9.096(0) (25°C) |
| color | White to off-white |
| optical activity | [α]23/D +9.0°, c = 2 in H2O |
| BRN | 1721645 |
| CAS DataBase Reference | 28954-12-3(CAS DataBase Reference) |
Safety information for L(+)-allo-Threonine
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| 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. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. |
Computed Descriptors for L(+)-allo-Threonine
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