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EC number: 203-398-6
CAS number: 106-44-5
In the time period 1997-2011, 27 monitoring data have been generated for
acute exposure (<15 minutes). An overview over the data is given in
appendix 1. Activities could be attributed to PROCs 1,2,3,8b and 9.
However it was not possible to evaluate the data on the basis of
individual PROCs as the number of data is not high enough. Therefore, a
statistical evaluation has been performed based on the total number of
data. It should be recognised that most of the data have are below the
limit of determination. For these cases, DIN EN 689 recommends to use
the half of the limit of determination. This was done for the
calculation of the 90th percentile:
Table1: Evaluation of short-term exposure data
Highest value (mg/m³)
90th percentile (mg/m³)
In the time period 1997-2011, 36 monitoring data have been generated for
shift exposure (8h-time-weighted average, TWA). An overview over the
data is given in appendix 2. Activities could be attributed to PROCs
1,2,3,8b,9 and 15. However it was not possible to evaluate the data on
the basis of individual PROCs as the number of data is not high enough.
It was however obvious that for the routine procedures PROC1,2,3 and 15,
exposure data were rather low. Higher exposure was found for filling
operations (PROC8b and 9). Therefore, one statistical evaluation has
been performed, based on 19 data for PROC1,2,3,15. A second evaluation
was performed for PROC8b and 9 based on 17 measured data. It should be
recognised that most of the data have are below the limit of
determination. For these cases, DIN EN 689 recommends to use the half of
the limit of determination. This was done for the calculation of the
90th percentile. It should be recognised that a few data with relatively
high limit of quantitation were eliminated as outliers prior to
Table2: Evaluation of long-term exposure data
Highest value (mg/m³)
This report comprises air monitoring results from 2 productions plants
manufacturing o-,m- and p-cresol. Each site produces or processes
several thousand tonnes cresols per year. Exposure levels have been
measured in the period from 1997 to 2011 related to at all relevant
activities of the workers where exposure to cresols was likely. In
total, 63 air monitoring data are available, 27 for short-term exposure
(<15 minutes) and 36 for shift exposure (8h-time-weighted average, TWA).
The results show that concentrations were up to 0.91 mg/m³ (8h-TWA) and
1.87 mg/m³ (15 min short-term exposure) with 90th percenentiles of 0.9
mg/m³ (short-term) and 0.07 to 0.23 mg/m³ (shift exposure).
Risk management measures (RMM`s) and operational conditions (OC`s) for
the worker`s activities and the processes are documented and described
in this report. Thus, process categories (PROC`s) could be attributed to
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