Bwtan
Cyfansoddyn organig sy'n perthyn i'r grŵp o hydrocarbonau a adwaenir fel alcanau yw bwtan.
Mae ganddo'r fformiwla foleciwlaidd C4H10. Nwy fflamadwy, di-liw yw bwtan o dan dymheredd ystafell a gwasgedd atmosfferig.
 | |
| Enghraifft o'r canlynol | math o endid cemegol  |
|---|---|
| Math | hydrocarbon aliffatig biogenig, butane |
| Màs | 58.078 uned Dalton |
| Fformiwla gemegol | C₄h₁₀ |
 Ffeiliau perthnasol ar Gomin Wicimedia | |
- Am y wlad yn Asia, gweler Bhwtan
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