| Impawu | Isici |
|---|---|
| Inombolo ye-CAS | 79-20-9 |
| Ifomula yamangqamuzana | C₃H₆O₂ |
| Isisindo samangqamuzana | 74,08–74,09 g/mol |
| Ukubukeka kwangaphandle | Ukuwuketshezi okucwebile okungenambala |
| Iphunga | Inambitheka kamnandi, njengezithelo |
| Izinga lokushisa lokuncibilika | –98 °C |
| Izinga lokubila | 57–58 °C |
| Izinga lokushisa lokuvutha | –15 °C kuya ku –10 °C |
| Ukuminyana (20°C) | 0.930–0.934 g/mL |
| Ingcindezi yomhwamuko (20°C) | 173 mm Hg |
| Ukuncibilika emanzini (20°C) | 22–25% |
| Inombolo ye-UN / Ikilasi | UN 1231, Ikilasi 3, Iqembu lokupakisha II |
| Ukugcinwa | Gcina endaweni epholile, eyomile, enomoya ohamba kahle kude nemithombo yomlilo |
1. Izici:
Ukubukeka nokuma komzimba: I-Methyl acetate iwuketshezi olucwebe, olungenambala, olushintsha kalula olunephunga elimnandi lezithelo. Kutholakala ngezinhlobo ezahlukene: ezimbonini (≥96%), i-urethane kanye nokudla (FEMA 2676).
Ukuncibilika: I-Methyl acetate iyancibilika emanzini (22–25%) futhi ixubana ngokuphelele nezincibilikisi eziningi eziphilayo, kufaka phakathi utshwala, ama-ester nama-hydrocarbon anephunga. Kuyisincibilikisi esingena-polar (esithanda amafutha) noma esine-polar encane (esithanda amanzi) esingena-protoni.
Izici zamakhemikhali: I-Methyl acetate (C₃H₆O₂) iyi-methyl ester ye-acetic acid. Lokhu kuwuketshezi olushisa kalula olunezinga lokushisa lokuqala ukusha elingu-–15°C kuya ku-–10°C, izinga lokubila elingu-56,9–58°C kanye nezinga lokuzitshisa elingu-501°C. Amagesi asinda kunomoya (ukujiya kwamagesi ngu-2,55) futhi angakha izingxube eziqhumayo nomoya (imikhawulo yokuqhumisa: 3,1–16% ngevolumu). Inhlanganisela isabela nama-oxidizing agents anamandla, ama-acids anamandla kanye nama-bases anamandla. Isebenza kancane namanzi yakhe i-acetic acid ne-methanol. I-Methyl acetate iyi isincibilikisi esingenayo i-VOC, okungeyona i-HAP (akuyona ingozi yokungcola komoya), okungacekeli ungqimba lwe-ozone kanye ukubola kahle ngokwemvelo. Inenani eliphansi le-MIR (0,07).
2. Ukusetshenziswa:
Upende, izinto zokumboza kanye nopende wokunyathelisa (okusetshenziswa okuyinhloko – okukhulu kakhulu): I-Methyl acetate isetshenziswa kabanzi njengesincibilikisi esisebenza ngokushesha esishabalala emoyeni ezingubeni ze-aerosol, izingubo zezimoto, izingubo zasolwandle, izingubo zokhuni kanye nezingubo zezimboni. Iyisincibilikisi esisebenza kahle kuma-inki okunyathelisa. Isincibilikisi esihle kakhulu se-nitrocellulose, i-cellulose acetate butyrate, ama-vinyl copolymers, ama-acrylics, ama-epoxy resins, ama-polyamides, ama-phenolic resins, ama-alkyds kanye nama-polyesters. Isetshenziswa kuma-paint removers kanye noketshezi lokususa i-nail polish.
Izinamathiselo, izinto zokuvala kanye nezinhlanganisela zokunamathisela: Isetshenziswa njengesincibilikisi kuma-glue, ama-sealant kanye nezinhlanganisela zokunamathisela.
Imboni yezemithi kanye neyekhemikhali: Isebenza njengesincibilikisi sokukhipha emkhakheni wokukhiqiza imithi. Isetshenziswa njengesincibilikisi ekuphenduleni kwamakhemikhali. Iyingxenye yokukhiqiza i-acetic anhydride.
Ukuhlanza kwezimboni nasekhaya: Ngenxa yokungabi nawo ama-VOC kanye nokubola kwemvelo, isetshenziswa kuma-cleaners nama-degreasers asemvelo aphephile.
Izimonyo kanye nezinto zokuzihlanza: Yenza umsebenzi wephunga nesincibilikisi emikhiqizweni yezimonyo.
Ama-aroma nezinto ezinephunga: Isetshenziswa njenge-flavour (FEMA 2676) kanye nengxenye yamakha.
Okunye ukusetshenziswa: Isikhumba sokwenziwa, isikhuthazi sokugcwalisa umoya se-polyurethane, imithi yezolimo, i-electronics.
3. Indlela yokukhiqiza:
Inqubo yezimboni: I-Methyl acetate itholakala ngokufakwa kwe-methanol ne-acetic acid lapho kukhona i-catalyst enamandla ye-asidi (i-sulfuric acid). Umkhiqizo uhlanjululwa nge-rectification. I-Methyl acetate ibuye itholakale ngokufaka i-carbonyl ku-dimethyl ether.
4. Ulwazi lokuphepha:
Ukuhlukaniswa kwengozi: I-Methyl acetate ibalwa njengento eyingozi enezinkomba zobungozi: H225 (Uketshezi oluvutha kalula kanye nomhwamuko), H319 (Kubangela ukucasuka okukhulu emehlweni), H336 (Kungase kubangele ukozela nesiyezi). Igama lesignali: Ingozi. Inombolo ye-UN: 1231 (Ikilasi 3, Iqembu lokupakisha II). NFPA 704: Ingozi yezempilo 1, Ukusha 3, Ukungazinzi 0.
Izingozi empilweni: Umoya ongcolile ungabangela ukucasuka kwemigudu yokuphefumula, ikhanda elibuhlungu, ukozela kanye nesiyezi. Kubangela ukucasuka kwesikhumba, amehlo kanye nekhala. Uma igwinya – ubuhlungu besisu, isicanucanu, ukuhlanza. Ukuchayeka isikhathi eside kungabangela ukuncipha kwethambo leso lokubona.
Izinyathelo zosizo lokuqala: Uma kungena emehlweni – geza ngamanzi, bheka udokotela. Esikhumbeni – geza ngamanzi. Uma kuhogwa – umoya omusha. Uma igwinywa – hlambulula umlomo, nikeza amanzi, bheka udokotela.
Ingozi yomlilo nokuqhuma: Uketshezi oluvutha kalula (izinga lokuvutha –15°C kuya ku –10°C). Umhwamuko ungakha izingxube eziqhumayo nomoya (3,1–16% ngevolumu). Uma kunesomlilo sebenzisa igwebu elingena-utshwala, impushana noma i-CO₂.
Ukugcinwa nokuzinza: Gcina ezitsheni ezivalwe ngokuqinile endaweni epholile, eyomile, enomoya ohamba kahle. Isikhathi sokusebenza: izinyanga ezingama-24–60 ezitsheni zoqobo ezivaliwe.
Ukuhambisana nemithetho: I-Methyl acetate (CAS#79-20-9, EC#201-185-2) ifakiwe kurejista ye-EINECS, TSCA, DSL. Ilawulwa yi-OSHA (PEL: 200 ppm) kanye ne-NIOSH (PEL: 200 ppm, STEL: 250 ppm). Ukuze uthole ulwazi oluphelele, sicela ubheke kuPaspoti Yokuphepha (SDS).
