Registration Dossier

Diss Factsheets

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

Constituent 1
Chemical structure
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.

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