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2-3-Dimethyl pyrazine (CAS#5910-89-4) Isithombe Esifakiwe
  • 2-3-Dimethyl pyrazine (CAS#5910-89-4) 1

2-3-Dimethyl pyrazine (CAS#5910-89-4)

Isakhiwo Samakhemikhali:

I-Molecular Formula I-C6H8N2
I-Molar Mass 108.14
Ukuminyana 1.011 g/mL ku-25 °C (okhanyisiwe)
I-Melting Point 11-13 °C
I-Boling Point 156 °C (okhanyisiwe)
I-Flash Point 130°F
Inombolo ye-JECFA 765
I-Vapor Presure 3.45mmHg ku-25°C
Ukubukeka uketshezi olucacile
I-Gravity ethize 1.022
Umbala Okungenambala kuya kokuwolintshi okukhanyayo ukuya kokuphuzi
Iphunga iphunga eligazingiwe, okukhumbuza amantongomane
I-BRN 107908
pKa 2.21±0.10(Okubikezelwe)
PH 7 (H2O, 20℃)
Isimo Sesitoreji Umkhathi ongenayo, izinga lokushisa legumbi
I-Refractive Index n20/D 1.507(lit.)
I-MDL MFCD07373397
Izakhiwo Zomzimba Nezamakhemikhali Ukuminyana 1.02
indawo yokuncibilika 11-13°C
iphoyinti lokubilisa 156°C
inkomba ye-refractive 1.506-1.508
iphoyinti elikhanyayo 54°C

Imininingwane Yomkhiqizo

Omaka bomkhiqizo

Amakhodi Engozi U-R10 – Uyavutha
I-R22 – Iyingozi uma igwinywe
R37/38 – Ukucasula uhlelo lokuphefumula kanye nesikhumba.
R41 – Ingozi yokulimala okubi emehlweni
Incazelo Yokuphepha S16 – Zigcine kude nemithombo yokuthungela.
S26 – Uma uthintana namehlo, geza ngokushesha ngamanzi amaningi futhi ufune iseluleko sezokwelapha.
S39 – Gqoka ukuvikela iso / ubuso.
Ama-ID e-UN UN 1993 3/PG 3
I-WGK Germany 3
I-RTECS UQ2625000
I-TSCA Yebo
Ikhodi ye-HS 29339990
Inothi Lengozi Iyacasula/Ivutha
I-Hazard Class 3
Iqembu Lokupakisha III

 

Isingeniso

2, 3-Dimethylpyrazine iyinhlanganisela yezinto eziphilayo. Okulandelayo yisingeniso kwezinye zezakhiwo zayo, ukusetshenziswa, izindlela zokukhiqiza kanye nolwazi lokuphepha:

 

Ikhwalithi:

I-2, 3-Dimethylpyrazine iyi-crystalline eqinile engenambala ukuya kophuzi. Inephunga le-acetone noma i-ethers futhi ingancibilika kuma-alcohol nezincibilikisi ze-ether.

 

Sebenzisa:

I-2, 3-Dimethylpyrazine isetshenziswa ngokuyinhloko njengento yokuqala yokuhlanganiswa kwezinto eziphilayo. Ingasetshenziswa njenge-catalyst ye-esterification, i-carboxylation kanye ne-enolation ngaphansi kwezimo ze-alkali.

 

Indlela:

2, 3-dimethylpyrazine ingalungiswa ngokufaka i-SN2 esikhundleni se-ethyl iododide noma i-ethyl bromide nge-2-aminopyrazine. Izimo zokusabela ngokuvamile zenziwa lapho kukhona i-alkaline medium, njenge-sodium ethoxide. Ngemuva kokusabela, umkhiqizo ohlosiwe utholakala nge-crystallization noma ukukhishwa.

 

Ulwazi Lokuphepha:

I-2, i-3-Dimethylpyrazine inobuthi obuphansi ngaphansi kwezimo ezijwayelekile zokusetshenziswa. Njengekhemikhali, ukuthinta isikhumba, amehlo, kanye nomgudu wokuphefumula kungase kubangele ukucasuka. Izimiso zokuphepha zaselabhorethri ezivamile ezifana nokugqoka amagilavu ​​aselabhorethri okuvikela, izibuko, nezinto zokuvikela ukuphefumula kufanele zilandelwe lapho zisetshenziswa. Uma uthintana ngephutha noma uhogele umoya, geza noma susa indawo ethintekile ngokushesha futhi ufune iseluleko sezokwelapha.

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