Carcinogenic Substances at Work
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BENZENE<br />
Benzene – chemical and physical properties 1<br />
SELECTED INTERNATIONAL WORKPLACE EXPOSURE<br />
LIMITS FOR BENZENE (8 HOURS TWA)<br />
CAS no. 71-43-2<br />
Appearance and colour:<br />
Odour:<br />
Odour threshold:<br />
Melting point:<br />
Boiling point:<br />
Flash point/flash point range:<br />
Flammability:<br />
Explosion thresholds:<br />
LEL (lower explosion limit)<br />
UEL (upper explosion limit):<br />
Liquid, colourless<br />
Arom<strong>at</strong>ic<br />
Approx. 5 ppm<br />
6 °C<br />
80 °C<br />
-11 °C<br />
Liquid and vapour<br />
highly flammable<br />
1.2 vol-%<br />
8.6 vol-%<br />
MEASUREMENT OF BENZENE<br />
Detecting arom<strong>at</strong>ic hydrocarbons is not easy – particularly<br />
in low concentr<strong>at</strong>ions or as part of compounds. The choice<br />
of measurement method (selective or non-selective)<br />
depends on the measuring task (e.g. leak searches,<br />
workplace monitoring, pre-entry-measurement) and the<br />
measuring quality desired. The lower the workplace limits,<br />
the more challenging the measurement process.<br />
Country/Region Parts per million Mg/m³<br />
Europe 1 3.25<br />
Germany (acceptance level) 0.06 0.2<br />
Germany (tolerance level) 0.6 1.9<br />
USA (ACGIH)<br />
STEL: 2.5<br />
TWA: 0.5<br />
Benzene<br />
Dräger X-act® 7000<br />
TWA: 1.6<br />
TWA: 8<br />
China (PC-STEL CN) – 10<br />
China (PC-TWA CN) – 6<br />
Singapore 1 PEL (LT) 3.18 PEL (LT)<br />
Is your country not included? <br />
Visit our hazardous substances d<strong>at</strong>abase VOICE for more<br />
inform<strong>at</strong>ion: www.draeger.com/voice<br />
Dräger X-pid®<br />
9000/9500<br />
Several selective and non-selective methods or an<br />
intelligent combin<strong>at</strong>ion of it are suitable. A multi gas<br />
detector with PID sensor measures the cumul<strong>at</strong>ive<br />
concentr<strong>at</strong>ion of existing VOCs in a non-selective way.<br />
For frequent selective random samples the analysis mode<br />
of the Dräger X-pid® 9000 or if less frequent, several<br />
Dräger Short-term Tubes like Benzene 2/a can be used.<br />
Spot measurements of concentr<strong>at</strong>ions down to 0.15 ppm<br />
can be done with the Dräger X-act® 7000.<br />
Dräger X-am® 8000<br />
Dräger Shortterm<br />
Tubes<br />
Find more inform<strong>at</strong>ion about suitable measuring<br />
equipment in the chapter "Measuring carcinogens".<br />
1 IFA. (n.d.-a). Benzene. Gestis Substance D<strong>at</strong>abase. Retrieved July 3, 2020, from http://gestis-en.itrust.de/nxt/g<strong>at</strong>eway.dll/gestis_en/000000.xml?f=templ<strong>at</strong>es$fn=default.<br />
htm$vid=gestiseng:sdbeng$3.0<br />
2 The Facts on Benzene. (2020, March 30). Roadmap on Carcinogens. https://roadmaponcarcinogens.eu/benzene/<br />
3 Drägerwerk AG & Co. KGaA. (n.d.). Benzene . Dräger VOICE D<strong>at</strong>abank. Retrieved July 3, 2020, from https://www.draeger.com/en_seeur/Applic<strong>at</strong>ions/VOICE/<strong>Substances</strong>/37<br />
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