4,4'-Diamino-2,2'-stilbenedisulfonic acid
Synonym(s):Amsonic acid
- CAS NO.:81-11-8
- Empirical Formula: C14H14N2O6S2
- Molecular Weight: 370.4
- MDL number: MFCD00024946
- EINECS: 201-325-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-12-18 13:37:16
What is 4,4'-Diamino-2,2'-stilbenedisulfonic acid?
Chemical properties
Light Yellow Powder
The Uses of 4,4'-Diamino-2,2'-stilbenedisulfonic acid
In manufacture of dyes, bleaching agents.
The Uses of 4,4'-Diamino-2,2'-stilbenedisulfonic acid
4,4’-Diaminostilbene-2,2’-disulfonic Acid, 95+% (cas# 81-11-8) is a compound useful in organic synthesis.
What are the applications of Application
4,4′-Diaminostilbene-2,2′-disulfonic Acid is an intermediate used in synthesis
General Description
Odorless yellowish microscopic needles or cream-colored powder. pH approximately 4.3 at 30 g/L water (suspension).
Air & Water Reactions
Insoluble in water.
Reactivity Profile
4,4'-Diamino-2,2'-stilbenedisulfonic acid is incompatible with iron. 4,4'-Diamino-2,2'-stilbenedisulfonic acid forms sparingly water-soluble, crystalline salts with many bisquaternary ammonium bases.
Fire Hazard
Flash point data for 4,4'-Diamino-2,2'-stilbenedisulfonic acid are not available; however, 4,4'-Diamino-2,2'-stilbenedisulfonic acid is probably combustible.
Synthesis
A typical procedure for preparation of 4,4'-Diamino-2,2'-stilbenedisulfonic acid: A solution of potassium hydroxide (3 g, 52 mmol) in a low amount of water was slowly added with stirring to a mixture of p-nitrotoluene ortho sulfonic acid (2.2 g, 10 mmol), diethylene glycol (20 mL) and 2.5 mL of hydrazine hydrate 85%. The resulting mixture was refluxed for 30 minutes, then the condenser was removed, the aqueous liquor evaporated, and refluxing continued for 2.5 hours. The reaction mixture was cooled and diluted with water when the reaction was completed. Then, the cooled and diluted reaction mixture was acidified with warm, concentrated hydrochloric acid, and the pure product was filtered.
Environmental Fate
For the environment, various NOEC and LC50 values were gained from test results; LC50 = > 1000 mg/l (acute fish); EC50 = 210 mg/l (acute daphnia); EC50 = 76 mg/l (acute algae); NOEC = 32 mg/l (algae); NOEC = 37 mg/l (longterm daphnia reproduction). The lowest toxicity result (72h-NOEC, biomass, for Selenastrum capricornutum, 32 mg/l) was used to derive a PNEC. An assessment factor of 100 was used according to the OECD Provisional Guidance for Initial Assessment of Aquatic Effects. Thus, PNEC of 4,4'-Diamino-2,2'-stilbenedisulfonic acid is 0.32 mg/l in the present report. The PEC is lower than the PNEC. The environmental risk is presumed to be low.
Properties of 4,4'-Diamino-2,2'-stilbenedisulfonic acid
Melting point: | 300 °C |
Density | 1.4732 (rough estimate) |
vapor pressure | 1.3hPa at 25℃ |
refractive index | 1.6510 (estimate) |
storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
solubility | Aqueous Base (Slightly) |
pka | -1.58±0.50(Predicted) |
form | Crystalline Powder |
color | Cream to yellow-brown |
Water Solubility | <0.1 g/100 mL at 23 ºC |
Merck | 14,595 |
BRN | 629516 |
Stability: | Stable. Combustible. Incompatible with iron, strong oxidizing agents. |
CAS DataBase Reference | 81-11-8(CAS DataBase Reference) |
EPA Substance Registry System | Amsonic acid (81-11-8) |
Safety information for 4,4'-Diamino-2,2'-stilbenedisulfonic 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. 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. |
Computed Descriptors for 4,4'-Diamino-2,2'-stilbenedisulfonic acid
4,4'-Diamino-2,2'-stilbenedisulfonic acid manufacturer
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