3 4-Dichlorophenylhydrazine hydrochloride (CAS # 19763-90-7)
Risk thiab Safety
| Risk Codes | R20/21/22 - Ua phem los ntawm kev nqus pa, tiv thaiv daim tawv nqaij thiab yog tias nqos. R36/37/38 - Kab mob rau 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 S36/37/39 - Hnav cov khaub ncaws tiv thaiv tsim nyog, hnab looj tes thiab tiv thaiv qhov muag / ntsej muag. S22 - Tsis txhob nqus plua plav. S24/25 - Tsis txhob sib cuag nrog daim tawv nqaij thiab qhov muag. |
| UN IDs | 2811 ib |
| WGK Germany | 3 |
| HS Code | 29 280 000 ib |
| Kev Ceeb Toom | Ua phem/Irritant |
| Hazard Class | IRRITANT |
3 4-Dichlorophenylhydrazine hydrochloride (CAS # 19763-90-7) Cov ntaub ntawv
| daim ntawv thov | 3, 4-dichlorophenylhydrazine hydrochloride yog ib qho tshuaj nruab nrab uas siv tau los npaj biphenylpyridine. |
| txoj kev npaj | 3,4-dichloroaniline (38.88g, 0.2399mol) yog yaj hauv dichloroethane (30ml), tom qab ntawd 12mol / L concentrated hydrochloric acid (70ml, 0.84mol) ntxiv, sodium nitrite (18.06g, 0.261mol) ntxiv, cov tshuaj tiv thaiv yog nplawm ntawm 5 ℃ rau 30min, thiab cov kua ntshiab lim tau lim tawm, poob mus rau 140ml ntawm sodium sulfite tov uas muaj (90.71g, 0.7197mol), teb ntawm 80 ℃ li 3 teev, react los tsim 3,4-dichlorophenylhydrazine, ntxiv txog (60ml, 0.72mol) concentrated hydrochloric acid rau 1 teev, do. hmo ntuj ntawm chav tsev kub, lim kom tau 3,4-dichlorophenylhydrazine hydrochloride dawb khoom 46.1 g, yoj: 90%. |
Sau koj cov lus ntawm no thiab xa tuaj rau peb
