Registration Dossier

Administrative data

Endpoint:
pH
Type of information:
other: peer-reviewed data
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: peer-reviewed data from handbook or collection of data

Data source

Reference
Reference Type:
review article or handbook
Title:
L-Tryptophan
Author:
HSDB
Year:
2004
Bibliographic source:
Hazardous Substances Data Bank, http://csi.micromedex.com

Materials and methods

Principles of method if other than guideline:
In the peer-reviewed data bank, the pH of a L-tryptophan solution is reported.
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

pH value
pH value:
5.5 - 7
Temp.:
25 °C
Concentration:
1 g/L

Applicant's summary and conclusion

Conclusions:
The pH of a 1% aqueous solution of L-tryptophan is in the range between 5.5 and 7.
Executive summary:

In the peer-reviewed data bank, the pH of a 1% aqueous solution of L-tryptophan is reported to be in the range between 5.5 and 7.