- DSD Acid
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- $100.00 / 25kg
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2024-04-29
- CAS:81-11-8
- Min. Order: 1000kg
- Purity: 95%
- Supply Ability: 20 tons
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| | 4,4'-Diamino-2,2'-stilbenedisulfonic acid Basic information |
| Product Name: | 4,4'-Diamino-2,2'-stilbenedisulfonic acid | | Synonyms: | diaminostilbenedisulfonicacid;4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid;4',4" Diamino stillbene 2'2" disulphonic acid;1,2-bis(4-amino-2-sulfophenyl)ethene;4,4'-Diamino-2,2'-stibenedisulfonic acid;4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACI D, TECH., 85%;2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci;2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid | | CAS: | 81-11-8 | | MF: | C14H14N2O6S2 | | MW: | 370.4 | | EINECS: | 201-325-2 | | Product Categories: | Stilbenes;Fluorescent Labels & Indicators;Intermediates of Dyes and Pigments;bc0001 | | Mol File: | 81-11-8.mol |  |
| | 4,4'-Diamino-2,2'-stilbenedisulfonic acid Chemical Properties |
| 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. | | LogP | -1.7--1.42 at 25℃ | | CAS DataBase Reference | 81-11-8(CAS DataBase Reference) | | EPA Substance Registry System | Amsonic acid (81-11-8) |
| | 4,4'-Diamino-2,2'-stilbenedisulfonic acid Usage And Synthesis |
| Chemical Properties | Light Yellow Powder | | Uses | 4,4’-Diaminostilbene-2,2’-disulfonic Acid, 95+% (cas# 81-11-8) is a compound useful in organic synthesis. | | Uses | In manufacture of dyes, bleaching agents. | | 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.
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| | 4,4'-Diamino-2,2'-stilbenedisulfonic acid Preparation Products And Raw materials |
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