Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

Remarkable physical-chemical properties of L-aspartic acid:

- The melting temperature is 230 °C, decomposition starts at 235 °C.

- The boiling temperature is calculated to 348 °C.

- The relative density is 1.66 at 13 °C.

- The mass median aerodynamic diameter is 418 µm.

- The vapour pressure is 0.000035 Pa at 25 °C.

- The log of the partition coefficient for n-octanol/water is -3.89.

- The water solubility is 5.3 g/L at 25 °C. The pH of a 1 % suspension is 3.03.

- No surface activity is expected, based on the structure of the molecule.

- L-aspartic acid has acidic ionization constants of pK1: 2.10; pK2: 3.86 and pK3: 9.82.

- L-aspartic acid has no dangerous physical-chemical properties.