A7297112
Sulfanilic acid , AR,99.5% , 121-57-3
Synonym(s):
4-Aminobenzenesulfonic acid;4-Aminobenzenesulfonic acid, Aniline-4-sulfonic acid;Aniline-4-sulfonic acid;Sulfanilic acid;Sulfanilic acid solution
CAS NO.：121-57-3
Empirical Formula: C6H7NO3S
Molecular Weight: 173.19
MDL number: MFCD00007886
EINECS: 204-482-5
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | >300 °C(lit.) |
| Boiling point: | 288 ℃ |
| Density | 1.485 |
| vapor pressure | 0Pa at 25℃ |
| refractive index | 1.5500 (estimate) |
| storage temp. | Store below +30°C. |
| solubility | 10g/l |
| pka | 3.24(at 25℃) |
| form | solid |
| color | White to Off-White |
| PH | 2.5 (10g/l, H2O, 20℃) |
| Water Solubility | 0.1 g/100 mL (20 ºC) |
| Merck | 14,8926 |
| BRN | 908765 |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | HVBSAKJJOYLTQU-UHFFFAOYSA-N |
| LogP | -2.3 at 25℃ |
| CAS DataBase Reference | 121-57-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Benzenesulfonic acid, 4-amino-(121-57-3) |
| EPA Substance Registry System | Sulfanilic acid (121-57-3) |
Description and Uses
Sulfanilic acid (4-amino benzene sulfonic acid ) is an off-white crystalline solid which finds application in quantitative analysis of nitrate and nitrite ions. The solid acid exists as a zwitterion, and has an unusually high melting point.
Sulfanilic acid may be used for the functionalization of single-walled carbon nanotubes (SWNTs) with aryl sulfonate groups.
Safety
| Symbol(GHS) |  GHS07 |
| Signal word | Warning |
| Hazard statements | H315-H317-H319 |
| Precautionary statements | P261-P264-P272-P280-P302+P352-P305+P351+P338 |
| Hazard Codes | C,Xi |
| Risk Statements | 36/38-43-34 |
| Safety Statements | 26-36/37/39-45-37-24-36/37 |
| RIDADR | UN 2790 8/PG 3 |
| WGK Germany | 1 |
| RTECS | WP3895500 |
| Autoignition Temperature | >400 °C |
| TSCA | Yes |
| HS Code | 29214210 |
| Hazardous Substances Data | 121-57-3(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 12300 mg/kg |
