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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
2018 March 14
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: DIN 19268
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Potassium hydrogen 7-aminonaphthalene-1,3-disulphonate
EC Number:
212-669-8
EC Name:
Potassium hydrogen 7-aminonaphthalene-1,3-disulphonate
Cas Number:
842-15-9
Molecular formula:
C10H9NO6S2.K
IUPAC Name:
potassium hydrogen 7-aminonaphthalene-1,3-disulfonate
Test material form:
solid: particulate/powder
Details on test material:
grey powder
Specific details on test material used for the study:
Test substance: NDG
Appearance powder


Reagents

Reagent:
water

Results and discussion

pH value
Key result
pH value:
2.7
Temp.:
20 °C
Concentration:
1 vol%

Applicant's summary and conclusion

Conclusions:
pH of NDG in 1% water at 20°C is measured at 2.7
Executive summary:

pH of NDG in 1% water at 20°C is measured at 2.7