2,4-dihydroxybenzoic acid

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16.04.2018 - 18.04.2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

GLP compliance:

no

Type of method:

effusion method: isothermal thermogravimetry

Test material

Test material information

Constituent 1

Reference substance name:

2,4-dihydroxybenzoic acid

EC Number:

201-946-9

EC Name:

2,4-dihydroxybenzoic acid

Cas Number:

89-86-1

Molecular formula:

C7H6O4

IUPAC Name:

2,4-dihydroxybenzoic acid

Test material form:

solid

Results and discussion

Vapour pressure

Key result

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

0 Pa

Any other information on results incl. tables

The value of logv_T at 25 °C was calculated from linear regression relationship:

logv_T.25°C = 10.418 - 5532.9× 3.35402×10^-3

 

logv_T at 25 °C is -8.139438

 

logp_T,25°C was calculated from the relationship determined by measuring reference items:

logp_T,25°C = 4.1212 + 1.1267 × logv_T,25°C

 

logp_T at 25 °C          -5.04950

p_T at 25 °C                8.92×10^-6Pa

Applicant's summary and conclusion

Conclusions:

The vapor pressure of beta-resorcylic acid at 25°C is 0,00000892 Pa.

Executive summary:

The vapour pressure of the test item 2,4-dihydroxybenzoic acid, is 8.92×10^-6 Pa at 25 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006).