121-57-3
Product Name:
Sulfanilic acid
Formula:
C6H7NO3S
Synonyms:
4-Aminobenzenesulfonic acid;4-Aminobenzenesulfonic acid, Aniline-4-sulfonic acid;Aniline-4-sulfonic acid;Sulfanilic acid;Sulfanilic acid solution
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | 4-aminobenzene sulfonic acid appears as white powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212 °F. Low toxicity (used medicinally). |
|---|---|
| Color/Form | Orthorhombic plates or monoclinic from water |
| Melting Point | Decomposes without melting at 550 °F (NTP, 1992) |
| Solubility | less than 1 mg/mL at 68 °F (NTP, 1992) |
| Density | 1.485 at 77 °F (NTP, 1992) - Denser than water; will sink |
| Vapor Pressure | 0.0000002 [mmHg] |
| LogP | log Kow = -2.16 |
| Decomposition | When heated to decomposition it emits toxic vapors of /nitrogen oxides and sulfur oxides/. |
| Dissociation Constants | pKa = 3.25 at 25 °C; pKa = 3.34 at 15 °C |
| Other Experimental Properties | Orthorhombic plates from water; decomposes without melting at about 288 °C (Also reported as greater than 360 °C); almost insoluble in ethanol, ether, benzene; slightly soluble in hot methanol; K2 at 25 °C: 5.93x10-4 /Sulfanilic acid monohydrate/ |
| Chemical Classes | Nitrogen Compounds -> Aminobenzenesulfonic Acids |
SAFETY INFORMATION
| Signal word | Warning |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H317:Sensitisation, Skin H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P272:Contaminated work clothing should not be allowed out of the workplace. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 173.19 g/mol |
|---|---|
| XLogP3 | -0.6 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 1 |
| Exact Mass | 173.01466426 g/mol |
| Monoisotopic Mass | 173.01466426 g/mol |
| Topological Polar Surface Area | 88.8 Ų |
| Heavy Atom Count | 11 |
| Formal Charge | 0 |
| Complexity | 211 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
4-aminobenzene sulfonic acid appears as white powder with faint purple tinge. Grayish-white flat crystals. Becomes anhydrous at around 212 °F. Low toxicity (used medicinally).