Name | disodium disulphate |
Synonyms | disulfuric acid SODIUM DISULFATE disodium disulfate Disodium disulfate Sodiumpyrosulphate SODIUM PYROSULFATE Sodium pyrosulfate disodium disulphate Disodium disulphate SodiuM anhydrosulfate Disulfuricacid,disodiumsalt Sodium acid sulfate anhydrous Disulfuric acid, disodium salt |
CAS | 13870-29-6 |
EINECS | 237-625-5 |
InChI | InChI=1/2Na.2H2O4S/c;;2*1-5(2,3)4/h;;2*(H2,1,2,3,4)/q2*+1;;/p-4 |
Molecular Formula | Na2O7S2 |
Molar Mass | 222.11 |
Density | 2.67 |
Melting Point | 396 °C |
Boling Point | 330°C at 760 mmHg |
Solubility | Soluble in water and decompose at 460 ℃. Soluble in water to form sodium bisulfate, the solution is acidic, soluble in fuming sulfuric acid, insoluble in ethanol. |
Vapor Presure | 3.35E-05mmHg at 25°C |
Appearance | Solid |
Storage Condition | Room Temprature |
Use | Acid melting agent, molten ore. |
Safety Description | 24/25 - Avoid contact with skin and eyes. |
HS Code | 28331900 |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | acidic melting agent, molten ore. |
production method | 1. the reagent sodium bisulfate monohydrate is heated to 200~250 ℃ to melt, the salt boils and loses crystal water, and then the temperature is raised to 320 ℃: when light sulfur trioxide smoke appears in the molten salt, the reaction is over, and after a little cooling, it can be crushed. |