Il forum libero di www.Guruji.it
Il forum libero di www.Guruji.it
Home | Profilo | Registrazione | Discussioni attive | Utenti | Cerca | FAQ
Nome utente:
Password:
Salva la password
Hai dimenticato la Password?

 Tutti i forum
 Il forum libero di www.Guruji.it
 Segnalazioni
 Sodium Sulfite
 Nuova discussione  Partecipa alla discussione
 Versione stampabile
Autore Discussione precedente Discussione Discussione successiva  

domuneladunylosew

Messaggi 6

Spedito - 22/11/2020 :  21:07:51  Mostra profilo  Rispondi allegando il testo





Melting point




500 °C






Density




2.63






Refractive index




1,484






Storage conditions




Store at RT.






Solubility




H2O: 1 M at 20 °C, clear, colorless






form




Solid






colour




White to slightly yellow






PH value




9.0-10.5 (25℃, 1M in H2O)






Water solubility




23 g/100 mL (20 oC)






Sensitivity




Hygroscopic






Merck




14,8682






stability




Stable. Incompatible with strong acids. Moisture and air sensitive.






CAS database




7757-83-7(CAS DataBase Reference)









Synonyms: Sodium sulfite anhydrous; SODIUM SULFITE, EXSICCATED; SODIUM SULPHITE; anhydroussodiumsulfite; disodiumsulfite; exsiccatedsodiumsulfite; natriisulphis; natriumsulfid





Overview Sodium sulfite (English Sodium formula: Na2SO3) is an inorganic compound. It is a white granule powder at room temperature with a sulphur dioxide odor, stable on drying and sensitive to moisture. Soluble in water and glycerin, insoluble in ethanol, aqueous solution is alkaline, its aqueous solution is alkaline to litmus paper and phenolphthalein, and produces toxic sulfur dioxide gas with acid. The pH of 1% aqueous solution is 8.3~9.4, strong reduction Sex. It decomposes into sodium sulfide and sodium sulfate when heated, and gradually oxidizes to sodium sulfate when placed in air. In nature, there are three forms of anhydrous sodium sulfite, sodium sulfite and sodium sulfite, among which anhydrous sodium sulfite is the least susceptible to oxidation. Sodium sulfite can be obtained by passing sulfur dioxide into a sodium hydroxide solution, and when the sulfur dioxide is excessive, sodium hydrogen sulfite is formed. Alternatively, sulfur dioxide gas is introduced into the sodium carbonate solution, and after saturation, a sodium carbonate solution is added, and crystallized to obtain a hemihydrate crystal, which is heated and dehydrated to obtain an anhydride.


Sodium sulfite can be used as a developer, preparation of cellulose sulfite, preparation of sodium thiosulfate, preservatives for dried fruits and meats, deoxidizers in the printing and dyeing industry, and as a reducing chemical agent for chemical and laboratory applications. Production and synthesis.




http://www.dlskychem.com/active-pharmaceutical-ingredients/sodium-sulfite.html
  Discussione precedente Discussione Discussione successiva  
 Nuova discussione  Partecipa alla discussione
 Versione stampabile
Vai a:
Il forum libero di www.Guruji.it © www.Guruji.it Vai ad inizio pagina
 Image Forums 2001 Snitz Forums 2000