Kapur (or kapor) is a dipterocarp hardwood from trees of the genus Dryobalanops found in lowland tropical rainforests of Malaysia, Indonesia and South-East Asia.^[1] It is a durable construction tropical timber. One variety, D. aromatica, is a source of camphor.

The name kapur can refer to the following species from the Dryobalanops genus:^{[citation needed]}

• D. aromatica
• D. beccarii
• D. fusca
• D. keithii
• D. lanceolata
• D. oblongifolia
• D. rappa

Kapur is logged from old-growth forest, often illegally. These forests have developed over the course of hundreds of years. When harvested, these trees are often between 250 and 1000 years old.^[2] For a tree from the family Dipterocarpaceae, it takes approximately 100 years to reach a height of 30 meters.^[3] Most of the species that are sold as kapur are listed on the IUCN Red List for endangered species. For example, D. fusca is critically endangered.^[4]

Overexploitation has led to large scale deforestation in the tropics. The International Tropical Timber Organization is concerned with conserving the habitat of trees producing tropical timber.^{[citation needed]}

According to FSC, certified tropical hardwood can counteract deforestation. Forests that are managed according to the FSC standards, become economically valuable and might therefore not be converted to farmland.^[5] However, other organisations advise consumers to stay away from kapur altogether to avoid logging of centuries-old trees.^[6][7]

• Dipterocarp timber classification