Businesses involved in the the following industries (as defined by the SIC Codes 2007) can use the ProQuin product as defined in the table below.
| Options |
 |
 |
 |
| 05 Mining of coal and lignite |  |  |  |
| 05.1 Mining of hard coal |  |  |  |
| 05.10 Mining of hard coal |  |  |  |
| 05.10/1 Mining of hard coal from deep coal mines (underground mining) |  |  |  |
| 05.10/2 Mining of hard coal from open cast coal working (surface mining) |  |  |  |
| 05.2 Mining of lignite |  |  |  |
| 05.20 Mining of lignite |  |  |  |
| 06 Extraction of crude petroleum and natural gas |  |  |  |
| 06.1 Extraction of crude petroleum |  |  |  |
| 06.10 Extraction of crude petroleum |  |  |  |
| 06.2 Extraction of natural gas |  |  |  |
| 06.20 Extraction of natural gas |  |  |  |
| 07 Mining of metal ores |  |  |  |
| 07.1 Mining of iron ores |  |  |  |
| 07.10 Mining of iron ores |  |  |  |
| 07.2 Mining of non-ferrous metal ores |  |  |  |
| 07.21 Mining of uranium and thorium ores |  |  |  |
| 07.29 Mining of other non-ferrous metal ores |  |  |  |
| 08 Other mining and quarrying |  |  |  |
| 08.1 Quarrying of stone, sand and clay |  |  |  |
| 08.11 Quarrying of ornamental and building stone, limestone, gypsum, chalk and slate |  |  |  |
| 08.12 Operation of gravel and sand pits; mining of clays and kaolin |  |  |  |
| 08.9 Mining and quarrying n.e.c. |  |  |  |
| 08.91 Mining of chemical and fertiliser minerals |  |  |  |
| 08.92 Extraction of peat |  |  |  |
| 08.93 Extraction of salt |  |  |  |
| 08.99 Other mining and quarrying n.e.c. |  |  |  |
| 09 Mining support service activities |  |  |  |
| 09.1 Support activities for petroleum and natural gas extraction |  |  |  |
| 09.10 Support activities for petroleum and natural gas extraction |  |  |  |
| 09.9 Support activities for other mining and quarrying |  |  |  |
| 09.90 Support activities for other mining and quarrying |  |  |  |