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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2002
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
The study was conducted according to an internationally recognised method, but without detailed documentation and non-GLP. Therefore validation applies with restrictions.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2002
Report date:
2002

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
1981
GLP compliance:
no
Type of method:
dynamic method
Remarks:
ebulliometer

Test material

Constituent 1
Chemical structure
Reference substance name:
Reaction mass of methyl (3E)-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-hexenoate and methyl (3Z)-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-hexenoate
EC Number:
951-493-2
Molecular formula:
C17H28O2
IUPAC Name:
Reaction mass of methyl (3E)-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-hexenoate and methyl (3Z)-4-methyl-6-(2,6,6-trimethyl-1-cyclohexen-1-yl)-3-hexenoate
Test material form:
liquid
Details on test material:
Appearance: pale yellow liquid

Results and discussion

Vapour pressure
Key result
Temp.:
20 °C
Vapour pressure:
0.128 Pa

Any other information on results incl. tables

Detailed values are not provided.

The coefficients of the Antoine's equation are as follows:

VP(T) = 10exp{A-[B/(t+C)]} (mmHg)

or VP(T) = 10exp{(A+0.1249030)-[B/(t+C)]} (mbar)

A=8.3981;

B=3169.8;

C=257.7; (mmHg)

T = temperature in °C

Applicant's summary and conclusion

Conclusions:
Low volatility (based on volatility bands criteria for occupational exposure (Chesar / ECETOC TRA), << 500 Pa).
Executive summary:

The vapour pressure of the test substance was measured according to OECD104 guideline, dynamic (ebulliometer) method.

Measurements were recorded, and the coefficients of the non-linear Antoine's equation between VP and 1/T were calculated.

From this relationship, the extrapolated vapour pressure of the substance at 20°C is 0.128 Pa.

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