DL-Aspartic acid Property

Melting point:

300 °C

alpha 

[α]D20 0±0.3° (c=5, dil. HCl)

Boiling point:

245.59°C (rough estimate)

Density 

1.6622

refractive index 

1.4540 (estimate)

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

solubility 

SOLUBLE

form 

Crystalline Low Melting Mass

pka

2.28±0.23(Predicted)

color 

Yellow

Odor

acid taste

Water Solubility 

SOLUBLE

BRN 

774618

LogP

-1.075 (est)

CAS DataBase Reference

617-45-8(CAS DataBase Reference)

NIST Chemistry Reference

Dl-aspartic acid(617-45-8)

EPA Substance Registry System

Aspartic acid (617-45-8)

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22-36/37/38

Safety Statements 

22-24/25-36-26

WGK Germany 

3

RTECS 

CI9097800

TSCA 

Yes

HS Code 

29224995

Toxicity

LD50 ipr-mus: >6 g/kg KHFZAN 24(5),17,90

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P233Keep container tightly closed.

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304IF INHALED:

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P312Call a POISON CENTER or doctor/physician if you feel unwell.

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P340Remove victim to fresh air and keep at rest in a position comfortable for breathing.

P362Take off contaminated clothing and wash before reuse.

P403Store in a well-ventilated place.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

DL-Aspartic acid Chemical Properties,Usage,Production

Chemical Properties

White crystalline powder

Uses

Food additive.

Definition

ChEBI: An alpha-amino acid that consists of succinic acid bearing a single alpha-amino substituent

Biological Functions

DL-Aspartic acid (DL-Asp) is a racemic mixture of the proteinogenic amino acid L-aspartate and the non-proteinogenic amino acid D-aspartate. DL-Aspartic acid is used in studies on factors and conditions that enhance semen and sperm quality.

Hazard

Very low toxicity.

Biochem/physiol Actions

DL-Aspartic acid (DL-Asp) is a racemic mixture of the proteinogenic amino acid L-aspartate and the non-proteinogenic amino acid D-aspartate. DL-Aspartic acid is used in studies on factors and conditions that enhance semen and sperm quality.

Safety Profile

Very low toxicity byintraperitoneal route. When heated to decompositionemits toxic fumes of NOx.

Purification Methods

Likely impurities are glutamic acid, cystine and asparagine. Crystallise the acid from water by adding 4 volumes of EtOH and dry it at 110o. [Greenstein & Winitz The Chemistry of the Amino Acids J. Wiley, Vol 3 p 1856 1961, Beilstein 4 IV 2998, 3000.]