Phosphoric Acid CAS 7664-38-2
| Hazard Cov Cim | C - Corrosive |
| Risk Codes | R34 - Ua rau kub hnyiab |
| 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. S45 - Thaum muaj xwm txheej lossis yog tias koj tsis xis nyob, nrhiav kev kho mob tam sim ntawd (qhia daim ntawv lo thaum twg ua tau.) |
| UN IDs | UN 1805 |
Taw qhia
Phosphoric acid yog ib qho inorganic compound nrog cov tshuaj formula H3PO4. Nws zoo nkaus li tsis muaj xim, pob tshab crystals thiab yooj yim soluble hauv dej. Phosphoric acid yog acidic thiab tuaj yeem hnov mob nrog hlau los tsim cov pa roj hydrogen, nrog rau cov tshuaj tiv thaiv nrog cawv los tsim phosphate esters.
Phosphoric acid yog dav siv nyob rau hauv ntau yam lag luam, nrog rau raws li ib tug raw khoom rau zus tau tej cov chiv, tshuaj ntxuav, thiab zaub mov additives. Nws kuj tseem siv rau hauv kev tsim cov phosphate ntsev, tshuaj, thiab hauv cov txheej txheem tshuaj. Hauv biochemistry, phosphoric acid yog ib qho tseem ceeb ntawm cov hlwb, koom nrog hauv lub zog metabolism thiab DNA synthesis, ntawm lwm cov txheej txheem lom.
Kev tsim cov phosphoric acid feem ntau suav nrog cov txheej txheem ntub thiab qhuav. Cov txheej txheem ntub dej muaj cov cua kub phosphate pob zeb (xws li apatite lossis phosphorite) nrog sulfuric acid los tsim phosphoric acid, thaum cov txheej txheem qhuav muaj calcination ntawm phosphate pob zeb ua raws li ntub dej extraction thiab cov tshuaj tiv thaiv nrog sulfuric acid.
Hauv kev tsim khoom thiab siv, phosphoric acid ua rau muaj kev pheej hmoo ntawm kev nyab xeeb. Cov concentrated phosphoric acid muaj zog corrosive thiab tuaj yeem ua rau khaus thiab puas rau daim tawv nqaij thiab ua pa. Yog li ntawd, kev tiv thaiv kom zoo yuav tsum tau ua kom tsis txhob sib cuag ntawm daim tawv nqaij thiab nqus tau nws cov vapors thaum tuav phosphoric acid. Tsis tas li ntawd, phosphoric acid kuj ua rau muaj kev pheej hmoo ntawm ib puag ncig, vim tias kev tso tawm ntau dhau tuaj yeem ua rau dej thiab av paug. Yog li, kev tswj nruj thiab kev coj ua pov tseg kom raug yog qhov tseem ceeb thaum tsim khoom thiab siv.
