| Scientific Name | Koompassia malaccensis Maing |
| Trade Name | Kempas |
| Local Name | Hampas, Pah, Mengris, Impas, Toemaling, Garis, Ajam |
| Family | Leguminosae |
| Tree Size | Very large |
| Tree Height ( m ) | 55 |
| Tree Diameter ( cm ) | 45 |
| Tree Distribution | Malaya,Sumatra and Borneo. |
| Sapwood-Heartwood Distinction | Distinct |
| Sapwood Colour | White or pale yellow |
| Heartwood Colour | Brick red becoming reddish brown on exposure; with numerous yellow brown streaks. |
| Hardness | Hard |
| Specific Gravity Based on Weight Over-dry and Volume Green | 0.72 |
| Weight | Moderately heavy |
| Weight(Kg)/cubic meter at 12% Moisture Content | |
| Texture | Coarse textured |
| Grain | Straight to interlocked grain |
| Growth Rings | Indistinct |
| Porosity | Diffuse porous |
| Vessel Size | Vessels mostly solitary, large to moderately large, visible to naked eye |
| Vessel Arrangement | solitary, rarely in radial multiples of two to three; outline of solitary vessels circular |
| Vessel Diameter | 210 - 440 310 |
| Vessel Element Lenght | 450 - 745 745 |
| Perforation | Simple |
| Pit Outline | Polygonal |
| Pit Size | Large(11-18 µm),vestured. |
| Vessel Ray Pitting | Alternate and pit outline polygonal |
| Ray Nature | Moderately broad, visible to the naked eye, moderately numerous and widely spaced |
| Ray Arrangement/Type | One to three seriate; homogeneous. Rays show a definite storied structure |
| Ray Number | 3 - 5 |
| Ray Height | 400 - 600 480 |
| Fibre Walls | Fibres thick walled, non-septate with minutely bordered pits on the radial walls. |
| Fiber Length | |
| Modulus of Rupture in kg/cm2 (Green) | |
| Modulus of Elasticity in kg/cm2 (Green) | |
| Modulus of Rupture kg/cm2 (Dry) | |
| Modulus of Elasticity in kg/cm2 (Dry) | |
| Uses | Railway sleepers, constructional purposes and furniture making. |
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