Carboxylic Acid - China Export Customs Data

Carboxylic Acid - China Export Customs Data

Ulwazi malunga neCarboxylic Acid

I-carboxylic acid yi-organic compound equkethe iqela le-carboxyl (C (O) OH). Ifomula eqhelekileyo ye-asidi ye-carboxylic yi-R-C(O)OH, kunye no-R ebhekiselele kuyo yonke imolekyuli (enokwenzeka ukuba inkulu kakhulu). Iiasidi zeCarboxylic zenzeka ngokubanzi kwaye ziquka ii-amino acids (ezenza iiproteni) kunye ne-acetic acid (eyinxalenye yeviniga kwaye yenzeka kwimetabolism).

Iityuwa kunye neester ze-carboxylic acid zibizwa ngokuba yi-carboxylates. Xa iqela le-carboxyl lichithwa, isiseko sayo se-conjugate senza i-carboxylate anion. I-Carboxylate ion i-resonance-stabilized, kwaye oku kunyuka kozinzo kwenza i-carboxylic acids ibe ne-asidi ngakumbi kune-alcohols. I-Carboxylic acids inokubonwa njengeendlela ezincitshisiweyo okanye ze-alkylated ze-Lewis acid carbon dioxide; phantsi kweemeko ezithile zinokukhutshwa nge-decarboxylated ukuvelisa i-carbon dioxide.

Iinkcukacha zeNkcukacha zeDatha yokuThunyela ngaphandle kweTshayina

I-China idatha yokuthumela ngaphandle igubungela amanqaku alandelayo: I- Ex port, ikhowudi ye-HS yamasiko, imveliso, inyanga yokuthumela ngaphandle, ikhowudi yeshishini, igama leshishini, isixa, ixabiso, iyunithi, indawo (ilizwe lemvelaphi). isibhengezo sezibuko, iindlela zorhwebo, ezothutho, ilizwe lokuhamba, ifeksi, i-zip, i-imeyile, umntu oqhagamshelwana naye, ubume beshishini, idilesi, njl.njl ., zonke ezi nkcukacha ngoku ziyakwazi ukunikezela kuluntu ngokubanzi ngokwezithethe.

Ixabiso ledatha yaseTshayina yokuthumela ngaphandle

1. Ukwenza isicwangciso sezenzululwazi kunye nokufumana ababoneleli
2. Vavanya imveliso entsha okanye imveliso entsha, ukuba nokwenzeka kophuhliso lwemarike
3. Ukujongana neemarike ezahlukeneyo, yenza isicwangciso esisebenzayo samaxabiso
4. Beka esweni abantu okhuphisana nabo, iimpawu zorhwebo kunye neendlela zoshishino
5. Ukunciphisa iindleko zokuthumela ngaphandle

Malunga nenkampani yethu

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Ukungasebenzi kwemilinganiselo yethu

1. Amandla okunyaniseka -- Ingqibelelo sisiseko sayo yonke into esiyenzayo.

2. Amandla oMgangatho -- Sibeka kwaye sifezekise iinjongo zamabhongo.

3. Amandla okusebenza kunye -- Siyancedana ukuba siphumelele.

4. Amandla oXanduva -- Siyalwamkela uxanduva lwethu.

Inzuzo Yethu

1. Imvelaphi esemthethweni iqinisekise ingqibelelo, ukuqhubeka kunye nesantya sohlaziyo olukhawulezayo lomhla.

2. Umcebisi weengcali ubonelela ngezisombululo ezifanelekileyo kubathengi abahlukeneyo.

3. Isiqubulo sethu sithi "ukunyaniseka kuza kuqala", uya kufumana oko ubonayo ngaphambi kokuthenga.

Uhlalutyo lokuthumela ngaphandle kweTshayina

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Iikhathalo zomkhiqizo : Idatha yoRhwebo yaseTshayina > IDatha yoRhwebo lokuThumela eTshayina