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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: According to guideline OECD 105

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2009
Report date:
2009

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 105 (Water Solubility)
Deviations:
no
GLP compliance:
no
Type of method:
flask method

Test material

Constituent 1
Chemical structure
Reference substance name:
4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzene-1-sulfonic acid
EC Number:
201-901-3
Cas Number:
89-36-1
Molecular formula:
C10H10N2O4S
IUPAC Name:
4-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-1-yl)benzene-1-sulfonic acid

Results and discussion

Water solubility
Water solubility:
5.16 g/L
Temp.:
20 °C
pH:
1.9
Remarks on result:
other: mean of 3 measurements

Any other information on results incl. tables

Flask No.

Equilibration time
at 20 °C [h]

pH of aqueous
solution

Test substance
content [g/L]

1

24

1.9

5.27

2

48

1.9

5.11

3

72

1.9

5.12

mean

---

---

5.16

Applicant's summary and conclusion

Conclusions:
Interpretation of results (migrated information): soluble (1000-10000 mg/L)
Executive summary:

The water solubility was determined according to OECD TG 105. After a preliminary test, the shake flask method was chosen and yielded a water solubility of 5.16 g/L at 20 °C.