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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-04 - 2017-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Cross-reference
Reason / purpose for cross-reference:
reference to same study
Reference
Endpoint:
relative density
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-04 - 2017-08
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 109 (Density of Liquids and Solids)
GLP compliance:
not specified
Type of method:
pycnometer method
Specific details on test material used for the study:
TEST SUBSTANCE: CYASORB® UV-24 Light Absorber
Main component: 2,2`-Dihydroxy-4-methoxybenzophenone CAS# 131-53-3
Molecular formula C14H12O4
Molecular Weight: 244.24 g/mol
Appearance: yellow powder
Type:
density
Density:
1.39 g/cm³
Temp.:
22.7 °C
Type:
relative density
Density:
1.39
Temp.:
22.7 °C

Summary of Density Results, specimen weights, and room temperature during analysis.

Test Substance Specimen No.

Average Density (g/mL)

S.D.

Initial specimen wt (g)

Final sample weight (g)

Temperature (°C)

1

1.3886

0.0008

4.5107

4.5106

22.7

2

1.3887

0.0006

4.7798

4.7798

22.7
Conclusions:
The density of the test item is 1.39 g/cm³ at room temperature.
Executive summary:

The density of 2,2'-Dihydroxy-4 -methoxybenzophenone is 1.39 g/cm³ at 22.7 °C.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling Point)
GLP compliance:
not specified
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Chemical structure
Reference substance name:
Dioxybenzone
EC Number:
205-026-8
EC Name:
Dioxybenzone
Cas Number:
131-53-3
Molecular formula:
C14H12O4
IUPAC Name:
2-(2-hydroxybenzoyl)-5-methoxyphenol
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
TEST SUBSTANCE: CYASORB® UV-24 Light Absorber
Main component: 2,2`-Dihydroxy-4-methoxybenzophenone CAS# 131-53-3
Molecular formula C14H12O4
Molecular Weight: 244.24 g/mol
Appearance: yellow powder

Results and discussion

Boiling point
Decomposition:
yes
Decomp. temp.:
ca. 318 °C

Any other information on results incl. tables

Decomposition of Test Substance by DSC.

scan rate (°C/min)

Onset (°C)

5

310

5

307

10

317

10

319

20

325

20

324

Applicant's summary and conclusion

Conclusions:
The test item decomposes below the boiling point.
Executive summary:

2,2'-Dihydroxy-4 -methoxybenzophenone decomposes below the boiling point, with a decomposition onset at ca. 318 °C.