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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
hydrolysis
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)

Data source

Reference
Reference Type:
other: Prediction model
Title:
Hydrolysis by EPI (Estimation Programs Interface) Suite
Author:
Sustainability Support Service (Europe) AB - estimated
Year:
2016
Bibliographic source:
Estimation Programs Interface Suite™ United States Environmental Protection Agency, Washington, DC, USA. version 4.1

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: Modeling database
Principles of method if other than guideline:
HYDROWIN Program (v2.00) from EPI Suite estimation database
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
Sodium naphthalene-2-sulphonate
EC Number:
208-523-8
EC Name:
Sodium naphthalene-2-sulphonate
Cas Number:
532-02-5
Molecular formula:
C10H8O3S.Na
IUPAC Name:
sodium naphthalene-2-sulphonate
Details on test material:
- Name of test material (as cited in study report): Sodium naphthalene-2-sulphonate
- Substance type: Organic

Study design

Analytical monitoring:
not specified
Estimation method (if used):
AOP Program (v1.92)

Results and discussion

Dissipation DT50 of parent compound
Temp.:
25 °C
Hydrolysis rate constant:
0
DT50:
27.794 h
Type:
other: estimation
Remarks on result:
other: OVERALL OH Rate Constant = 4.6180 E-12 cm3/molecule-sec

Applicant's summary and conclusion

Conclusions:
The Hydrolysis rate constant of Sodium naphthalene-2-sulphonate is estimated to be 0.000000000004618 cm3/molecule-sec at half-life of 27.794 hrs. The estimated half-life of the substance indicates that the substance Sodium naphthalene-2-sulphonate is slowly hydrolysable.
Executive summary:

The Hydrolysis rate constant of Sodium naphthalene-2-sulphonate is estimated to be 0.000000000004618 cm3/molecule-sec at half-life of 27.794 hrs. The estimated half-life of the substance indicates that the substance Sodium naphthalene-2-sulphonate is slowly hydrolysable.