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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11/8/2016 - 11/8/2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard OECD test guideline.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2016
Report date:
2016

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
Principles of method if other than guideline:
The pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode system.
GLP compliance:
no

Test material

Constituent 1
Reference substance name:
6- aminonaphthalene-2-sulphonic acid
IUPAC Name:
6- aminonaphthalene-2-sulphonic acid
Constituent 2
Chemical structure
Reference substance name:
6-aminonaphthalene-2-sulphonic acid
EC Number:
202-208-9
EC Name:
6-aminonaphthalene-2-sulphonic acid
Cas Number:
93-00-5
Molecular formula:
C10H9NO3S
IUPAC Name:
6-aminonaphthalene-2-sulphonic acid
Test material form:
solid: crystalline
Details on test material:
- Name of test material (as cited in study report): 6- aminonaphthalene-2-sulphonic acid
- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value
Key result
pH value:
3.63
Temp.:
29 °C
Concentration:
1 other: % w/v
Remarks on result:
other: Acidic

Any other information on results incl. tables

Method Details

Observations

Remarks if, any

Temperature of 1% w/v test solution

-

29°C

 

mean pH (RESULT)

 

-

4.60

Inference

1.  Acidic

2.   Basic

3.   Neutral

 

 

Acidic

 

Applicant's summary and conclusion

Conclusions:
The pH determination of test chemical was done following OECD guideline 122. The mean pH of 1% w/v dispersion was measured with the help of digital pH meter. The mean pH was determined to be 3.63 at 29 °C.
Executive summary:

The pH determination of test chemical was done following OECD guideline 122. The mean pH of 1% w/v dispersion was measured with the help of digital pH meter. The mean pH was determined to be 3.63 at 29 °C. This value indicates that the substance is acidic in nature.