2,2'-Benzidinedisulfonic acid
- CAS NO.：117-61-3
- Empirical Formula: C12H12N2O6S2
- Molecular Weight: 344.36
- MDL number: MFCD00041885
- EINECS: 204-200-0
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-09 17:25:53
What is 2,2'-Benzidinedisulfonic acid?
Chemical properties
PURPLE CRYSTALLINE POWDER
The Uses of 2,2'-Benzidinedisulfonic acid
4,4'-Diaminobiphenyl-2,2'-disulfonic acid hydrate is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and Dyestuff.
Production Methods
2,2'-Benzidinedisulfonic acid is made from the potassium or sodium salt of 3- nitrobenzenesulfonic acid by a gradual reduction using zinc dust and sodium hydroxide solution in a dilute aqueous solution. The product is subsequently rearranged using hydrochloric acid or dilute sulfuric acid. Electrochemical or catalytic reductions are also possible.
General Description
Leaflets or prisms or light purple powder.
Air & Water Reactions
Insoluble in water.
Fire Hazard
Flash point data for 2,2'-Benzidinedisulfonic acid are not available; however, 2,2'-Benzidinedisulfonic acid is probably combustible.
Flammability and Explosibility
Non flammable
Safety Profile
A severe eye irritant. When heated to decomposition it emitsvery toxic fumes of SOx and NOx.
Properties of 2,2'-Benzidinedisulfonic acid
| Melting point: | 175°C |
| Boiling point: | 638.25℃[at 101 325 Pa] |
| Density | 1.5417 (rough estimate) |
| vapor pressure | 0Pa at 25℃ |
| refractive index | 1.6510 (estimate) |
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| form | Powder |
| pka | -1.85±0.50(Predicted) |
| color | Dark purple |
| Water Solubility | <0.1 g/100 mL at 20 ºC |
| CAS DataBase Reference | 117-61-3(CAS DataBase Reference) |
| EPA Substance Registry System | [1,1'-Biphenyl]-2,2'-disulfonic acid, 4,4'-diamino- (117-61-3) |
Safety information for 2,2'-Benzidinedisulfonic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract 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. P270:Do not eat, drink or smoke when using this product. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. P501:Dispose of contents/container to..… |
Computed Descriptors for 2,2'-Benzidinedisulfonic acid
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