# (+-)-Aspartic Acid

**CAS:** 617-45-8  
**PubChem CID:** [424](https://pubchem.ncbi.nlm.nih.gov/compound/424)  
**Molecular formula:** C4H7NO4  
**Molar mass:** 133.10 g/mol  
**IUPAC:** 2-aminobutanedioic acid  
**SMILES:** `C(C(C(=O)O)N)C(=O)O`  
**InChIKey:** `CKLJMWTZIZZHCS-UHFFFAOYSA-N`  
**InChI:** `InChI=1S/C4H7NO4/c5-2(4(8)9)1-3(6)7/h2H,1,5H2,(H,6,7)(H,8,9)`  

## Physicochemical properties

| Parameter | Value |
|---|---|
| logP (XLogP3) | -2.8 |
| PSA | 101 Ų |
| Hydrogen bond donors | 3 |
| Hydrogen bond acceptors | 5 |
| Rotatable bonds | 3 |
| Heavy atoms | 9 |

## 3D structure

The molecule contains 16 atoms connected by 15 chemical bonds. Interactive 3D model available at: https://molgod.org/molecule/617-45-8/

## Synonyms

- (+-)-Aspartic acid
- RefChem:905505
- DL-ASPARTIC ACID
- 617-45-8
- 2-aminobutanedioic acid
- DL-Aminosuccinic acid
- DL-Asparagic acid
- Aspartic acid, DL-
- DL-Asp-OH
- Acid D,L-aspart

## Data sources

- [PubChem CID 424](https://pubchem.ncbi.nlm.nih.gov/compound/424)
- [Wikidata](https://www.wikidata.org/wiki/Q27109481)
- [NIST WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=617-45-8)
- [ChEMBL](https://www.ebi.ac.uk/chembl/g/#search_results/all/query=617-45-8)

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*Last updated: 2026-09-25 · Generator: MOL-GOD v3.12.33*