Aspartic acid

pH

Administrative data

Endpoint:

pH

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2002

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Part of a guideline study with GLP

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2002

Materials and methods

Test guideline

Qualifier:

no guideline followed

Principles of method if other than guideline:

pH determination of an aqueous suspension

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Aspartic acid

EC Number:

200-291-6

EC Name:

Aspartic acid

Cas Number:

56-84-8

Molecular formula:

C4H7NO4

IUPAC Name:

aspartic acid

Test material form:

solid: crystalline

Details on test material:

Supplier: Sponsor.
Batch No.: PRCA 015.
CAS No. 56-84-8.
Appearance: White, crystalline.
Purity: Approx. 99 %.
pH: 2.5 – 3.5 (4 g/L at 20 °C).
Melting range: 265 – 271 °C.
Solubility in water: 5 g/L at 25°C.
Conditions of storage: In the refrigerator, in the dark, may be used under light.
Date of expiry: 31 December 2002.

Results and discussion

pH value

pH value:

3.03

Concentration:

10 g/L

Remarks on result:

other: Suspension at ambient temperature

Applicant's summary and conclusion

Conclusions:

The pH of a 1 % w/v suspension of L-aspartic acid was determined to 3.03.

Executive summary:

The pH of a 1 % w/v suspension of L-aspartic acid was determined to 3.03.