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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2007
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: OECD Guideline: NF T 20-048 AFNOR Sept.85
Deviations:
no
GLP compliance:
no
Type of method:
static method
Key result
Temp.:
20 °C
Vapour pressure:
ca. 0 Pa
Remarks on result:
other: on composite sample: extrapolated from the Vp curve from 294 - 344 °C
Temp.:
50 °C
Vapour pressure:
ca. 0 Pa
Remarks on result:
other: on composite sample: extrapolated from the Vp curve from 294 - 344 °C
Temp.:
294 °C
Vapour pressure:
ca. 2 900 Pa
Remarks on result:
other: on composite sample: measured

Description of key information

For Pitch, coal tar, high-temp., < 1% 4- to 5-membered condensed ring aromatic hydrocarbons [EC no. 701-305-8] (CTPhtht), the estimated vapour pressure at 293 K (20 °C) is estimated to be significantly below 0.00001 Pa, compared with structure-related pitch, coal tar, high temp [CAS No. 65996-93-2]: approx. 0.000006 Pa, extrapolated from the Vp curve at high temperature.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
20 °C

Additional information

Read-across from structure-related precursor compound: The extrapolated Vp of coal-tar pitch, high temp., has been adopted as reference value for the target compound.