2 2-Dimethyl-1 3-dioxan-5-one（CAS# 74181-34-3)
| Nga Tohu Whakamate | Xi – Irritant |
| Waehere Morearea | R36/37/38 – He whakapataritari ki nga kanohi, te punaha manawa me te kiri. R41 – He kino kino ki nga kanohi R37/38 – He whakapataritari ki te punaha manawa me te kiri. |
| Whakaahuatanga Haumaru | S26 – Mena ka pa ki nga kanohi, horoi tonu ki te nui o te wai me te rapu tohutohu hauora. S37/39 – Kia mau nga karapu tika me te whakamarumaru kanohi/kanohi S39 – Mau whakamarumaru kanohi / kanohi. S24/25 – A ape i te pa ki te kiri me nga kanohi. |
| UN ID | 1993 |
| Waehere HS | 29141900 |
| Te akomanga morearea | 3 |
| Roopu Tarapi | III |
Kupu Whakataki
Ko te 2,2-dimethyl-1, ko te 3-dioxan-5-one he pūhui waro me te tātai C6H10O3. Ko nga korero e whai ake nei mo tona ahuatanga, te whakamahinga, te whakarite me nga korero haumaru:
Taiao:
Ko te 2,2-Dimethyl-1,3-dioxan-5-one he wai kore tae me te kakara ketone motuhake. He 0.965 g/mL te kiato, he 156-157°C te ira koropuke, me te 60°C te ira hiko. He wairewa i roto i te maha o nga whakarewa pararopi penei i te ewaro, te ethyl acetate me te dichloromethane.
Whakamahia:
Ko te 2,2-Dimethyl-1,3-dioxan-5-one he takawaenga whakahiato waro e whakamahia nuitia ana. Ka taea te whakamahi hei ketonizing agent, esterifying agent me te condensing agent i roto i te synthesis. Ka taea te whakamahi i roto i te whakahiato o etahi atu puhui waro, penei i te paninga, te kapia, te waikano, te rongoa me nga matū pai.
Tikanga Whakaritenga:
Ko te tikanga whakarite o te 2,2-Dimethyl-1,3-dioxan-5-one ka taea e te tauhohenga waikura Uskberg. Ko te mea motuhake, ko te 1,3-butanediol te tauhohe me te methyl iodide ki te whakaputa i te 2,2-dimethyl -1,3-dioxane. Na, ko te 2,2-dimethyl -1,3-dioxane ka tukuna ki te tauhohenga waiora i te aroaro o te iodine, a ko te hua ko 2,2-Dimethyl-1,3-dioxan-5-one.
Mōhiohio Haumaru:
