Potassium bichromate yog cov khoom siv uas tsis yog-caking ntawm cov xim txiv kab ntxwv feem ntau (qee zaum liab), uas yaj zoo nyob rau hauv dej ib puag ncig thiab zoo li cov koob thinnest lossis daim hlau. Thaum sib cuam tshuam nrog cov khoom, cov kua dej ua kua qaub.
Potassium dichromate yog ib qho tshuaj lom neeg, carcinogenic thiab muaj zog oxidizing tus neeg sawv cev. Txau cov tshuaj tuaj yeem rhuav tshem daim tawv nqaij, pob txha mos, thiab nqus pa tuaj yeem ua rau lub ntsws puas.
Ntawm qhov kub ntawm li 1300 ° C, vim qhov kev sib pauv ntawm sodium dichromate thiab potassium chloride, poov tshuaj bichromate tau txais, cov mis ntawm uas yog K 2 Cr2 O7:
2KCl + Na2Cr2O7 → K 2Cr2O7 + 2NaCl.
Cov tshuaj no yog siv hauv kev lag luam. Technical potassium bichromate yog siv rau kev tsim cov khoom sib tw, roj teeb qhuav, cov xim tsis muaj roj, cov xim pleev xim, nrog rau cov organic synthesis - kom tau txais ntau yam tshuaj lom neeg.
Kev daws teeb liab-daj ntawm potassium dichromate stains litmus ntawvhauv liab liab. Thaum boiling ntxiv, cov tshuaj tov tau txais ib tug yam ntxwv tsaus liab tint. Thaum ncav cuag qhov kub ntawm 398 o C, poov tshuaj dichromate pib yaj thiab hloov mus rau hauv cov kua xim av tsaus, uas solidifies thiab crystallizes tom qab txias. Tshaj 500 o C, cov khoom ua kom tag nrho decomposes rau oxygen, chromium oxide thiab potassium chromate.
Lub cev thiab tshuaj lom neeg ntawm potassium bichromate
| Indicator | Unit of ntsuas | Meaning |
| crystal lattice | triclinic lossis monoclinic | |
| refraction | 1,738 | |
| molecular hnyav | 294, 19 | |
| kev sib nqus tshwj xeeb | g/cm3 | 2,684 |
| boil point | oC | 398 |
| melting point | oC | decomposes ntawm 500 |
| solubility hauv 100 grams dej ntawm qhov kub thiab txias: | g | |
| 0 oC | 4,7 | |
| 20oC | 11, 1 | |
| 100oC | 102 |
Txoj cai rau kev khaws cia thiab kev thauj mus los ntawm cov tshuaj phom sij siab
Technical potassium dichromate tuaj yeem thauj los ntawm txhua hom kev thauj mus los, raunrog rau kev zam ntawm huab cua. Ib qho tshuaj uas ntim rau hauv cov thawv tshwj xeeb npaj rau kev siv ib leeg tuaj yeem thauj tau los ntawm qhib dov Tshuag. Kev lag luam poov tshuaj bichromate yuav tsum tau muab khaws cia rau hauv cov khoom qhuav qhuav, thaum cov khoom hauv cov thawv ntim khoom tshwj xeeb tuaj yeem khaws cia rau hauv qhov chaw qhib nruab nrog lub ntsej muag tawv rau cov dej ntws.
Ntim ntawm cov tshuaj lom neeg muaj kev phom sij thawj zaug
Technical potassium dichromate tau ntim rau hauv cov nruas tsim tshwj xeeb, nrog rau cov hnab polyethylene, muaj tsib txheej, hnyav txog li 50 kg. Nws raug tso cai ntim rau hauv cov thawv mos rau lub hom phiaj tshwj xeeb rau kev siv ib zaug.
Defined hazard class for a chemical
Technical potassium bichromate yog tawg thiab tawg. Raws li qib ntawm kev cuam tshuam rau tib neeg lub cev, nws tau raug xaiv thawj chav kawm ntawm kev phom sij. Thaum ua hauj lwm nrog cov tshuaj, koj yuav tsum ua raws li kev ceev faj txog kev nyab xeeb, ceev faj thiab ceev faj, thiab tseem siv cov cuab yeej tiv thaiv tus kheej rau ntawm daim tawv nqaij thiab cov kab mob ua pa.
