E whakapau kaha ana mātou ki te tuku atu i te utu whakataetae, ngā hua whakamiharo tino pai, me te tuku tere hoki mō te Kaihanga o Haina e Hokona ana te 99.5% Propionic Acid CAS 79-09-4 me te Utu wheketere, I ngā wā katoa, kua aro nui mātou ki ngā taipitopito katoa kia pai ai te makona o ā mātou kiritaki ki ia hua.
E whakapau kaha ana mātou ki te tuku atu i te utu whakataetae, ngā hua whakamiharo, me te tuku tere hoki mōu. Ko te kaupapa here a tā mātou Kamupene ko te "kounga tuatahi, kia pai ake, kia kaha ake, kia pumau te whanaketanga". Ko tā mātou whāinga ko te "kia whai hua te hapori, ngā kiritaki, ngā kaimahi, ngā hoa mahi me ngā umanga". Ko tā mātou wawata kia mahi tahi me ngā kaihanga wāhanga waka katoa, te toa whakatika, ngā hoa waka, kia waihangahia he heke mai ataahua! Ngā mihi nui ki a koe mō te tirotiro i tā mātou paetukutuku, ā, e mihi ana mātou ki ō whakaaro katoa hei āwhina i a mātou ki te whakapai ake i tā mātou paetukutuku.
Tātari Hanganga o te Tātai Matū Waikawa Propionic
Mai i te tirohanga hanganga ngota, ka taea te wehewehe i te tātai o te waikawa propionic CH₃CH₂COOH kia toru ngā wāhanga matua. Ko te rōpū methyl whakamutunga (CH₃–) e whakaatu ana i ngā āhuatanga alkyl kua kukū, ko te rōpū methylene waenga (–CH₂–) e mahi ana hei wae hono, ā, ko te rōpū carboxyl (–COOH) e hoatu ana ki te ngota ōna āhuatanga waikawa noa. Ko te tikanga o tēnei whakaritenga hanganga ka whakaatuhia e te waikawa propionic ētahi āhuatanga rite ki te alkane me te tauhohenga waikawa carboxylic noa.
I te taha ā-wāhi, he tino māmā te whirihoranga rārangi o te ngota waikawa propionic. Ko te hononga takirua C=O me te rōpū hydroxyl –OH i roto i te rōpū carboxyl e hanga ana i tētahi hanganga papatahi, ko te mekameka alkyl ia e whakamahi ana i tētahi āhua tetrahedral mā te whakaranu sp³. Mā tēnei hanganga ka hoatu ki te ngota he pōraruraru taurite, e whakamārama ana i tōna whakauru ki te wai me te pupuri tonu i te hototahitanga ki ngā whakarewa kore-pōraruraru pērā i te diethyl ether me te chloroform.
He mea nui, ka wehea te hauwai carboxyl i roto i te waikawa propionic i roto i te wairewa, ka tukuna ngā iona H⁺ ka hanga i ngā anion propionate (CH₃CH₂COO⁻). Ko te hua o tēnei wehenga he pKa o te 4.87 (i te 25°C), ka whakarōpūtia hei waikawa ngoikore noa. He mea nui tēnei whanonga waikawa-pūtake ki te maha o ana tono, inā koa hei tiaki kai, ka taea e tōna āhua ngota ngota kore-wehewehe te uru pai ake ki roto i ngā kiriuhi pūtau moroiti.