2-Chloro-3,4-dihydroxyacetophenone CAS 99-40-1
Risk thiab Safety
| Hazard Cov Cim | Xi-xaj |
| Risk Codes | 36/37/38 – Khaus qhov muag, ua pa thiab tawv nqaij. |
| Kev nyab xeeb piav qhia | S26 - Thaum sib cuag nrog lub qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob. S37/39 - Hnav cov hnab looj tes tsim nyog thiab tiv thaiv qhov muag / ntsej muag S36 - Hnav khaub ncaws tiv thaiv zoo. |
| WGK Germany | 3 |
| HS Code | 29252900 ib |
99-40-1 - Cov ntaub ntawv siv
| Txheej txheem cej luam | 3, 4-dihydroxy-2 '-chloroacetophenone yog ib qho tseem ceeb nruab nrab ntawm cov synthesis ntawm carbamot. Carbazil tseem hu ua ntshav, adrenal pigment ammonia urea sodium salicylate, feem ntau yog siv rau kev nce capillary permeability tshwm sim los ntawm los ntshav. |
| Siv | Qhov nruab nrab ntawm cov tshuaj hemostatic anluoxue, adrenomimetic tshuaj gashaler, thiab lwm yam. |
| txoj kev tsim khoom | Ntxiv catechol thiab chloroacetic acid rau lub lauj kaub qhuav, nce qhov kub ntawm 60 ° C, thiab do, 85-90 ° C rwb thaiv tsev 0.5h. Txias kom qis dua 65 ℃, ntxiv phosphorus oxychloride, react ntawm 60-70 ℃ rau 4h, 70-80 ℃ rau 4h. Thaum nws nyuaj rau do cov reactants tuab, ntxiv dej, nce qhov kub thiab txias, thiab hydrolyze ntawm 90-100 ℃ rau 0.5h. Cov crystals tau txias kom qis dua 10 ° C., thiab lim. Cov khoom raug ntxuav nrog dej kom txog thaum nruab nrab kom tau 2-chloro-3 ',4'-dihydroxyacetophenone. |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
