Molecular Formula | C6H7NO4S |
Molar Mass | 189.19 |
Density | 1.5149 (rough estimate) |
Melting Point | ≥300°C(lit.) |
Boling Point | 398.09℃[at 101 325 Pa] |
Water Solubility | <0.1 g/100 mL at 21.5 ºC |
Vapor Presure | 0Pa at 25℃ |
Appearance | powder to crystal |
Color | Orange to Amber to Dark red |
BRN | 514765 |
pKa | -0.81±0.50(Predicted) |
Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
Stability | Stable. Incompatible with strong oxidizing agents, strong acids and strong bases. |
Refractive Index | 1.5500 (estimate) |
MDL | MFCD00007696 |
Physical and Chemical Properties | The pure product was colorless to gray-brown rhomboid crystals. soluble in hot water, soluble in alkaline solution. |
Use | Used as a dye intermediate |
Hazard Symbols | C - Corrosive |
Risk Codes | 34 - Causes burns |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
UN IDs | UN 2585 8/PG 3 |
WGK Germany | 1 |
Hazard Class | 8 |
Packing Group | III |
Reference Show more | 1. Wu, F. H., K. Chen, and D. K. Zhang. "Effects of Astragalus polysaccharide on immune function in B16 melanoma mice." TMR Integr Med 5 (2021): e21012.https://www.tmrjournals.com/im |
gray-white or light-brown feather-like crystals. The melting point was above 195 °c. Slightly soluble in water, soluble in acid and alkali, placed in the air gradually darkened color.
O-nitrochlorobenzene is chlorosulfonated with chlorosulfonic acid to give 4-chlorosulfonyl-2-nitrochlorobenzene, and then aminated to give 4-sulfonamido-2-nitrochlorobenzene, then, the sodium salt of 4-sulfonamido-2-nitrophenol is hydrolyzed into 4-sulfonamido-2-nitrophenol, acidified with hydrochloric acid, and reduced in the presence of iron powder to obtain a finished product.
The diazo component used as a neutral dye.
LogP | -2.56 at 25℃ |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Application | used as dye intermediate used as dye intermediate for the production of acid medium orange LR, acid medium violet, active purple K-3R, direct sun-resistant Brown BRL, etc. |
production method | from O-nitrophenol to sulfonic acid by reduction of iron powder or hydrogenation reduction. |