| Identification | More | [Name]
4,4'-Diamino-2,2'-stilbenedisulfonic acid | [CAS]
81-11-8 | [Synonyms]
2,2'-(1,2-ethylenediyl)bis(5-aminobenzenesulfonic acid)
4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACID
4,4'-DIAMINO STIBEN-2,2'-DISULFONIC ACID
4,4 DIAMINO STILBENE 2:2 DISULFONIC ACID
4,4'-DIAMINOSTILBENE-2,2'-DISULFONIC ACID
4,4'-DIAMINOSTILBENE-2,2'-DISULPHONIC ACID
4,4'-DIAMINOSTILBENE-2,2-DISULPHONIC ACID
AKOS BBS-00004717
AMSONIC ACID
DAS
DASD
DASDA
DSD ACID
2,2’-(1,2-ethenediyl)bis(5-amino-benzenesulfonicaci
2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci
2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid
2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicacid]
2,2’-(1,2-ethylenediyl)bis(5-amino-benzenesulfonicaci
2,2’-disulfo-4,4’-stilbenediamine
4,4’-diamino-2’-stilbenedisulfonicacid | [EINECS(EC#)]
201-325-2 | [Molecular Formula]
C14H14N2O6S2 | [MDL Number]
MFCD00024946 | [Molecular Weight]
370.4 | [MOL File]
81-11-8.mol |
| Chemical Properties | Back Directory | [Appearance]
Light Yellow Powder | [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) | [form ]
Crystalline Powder | [pka]
-1.58±0.50(Predicted) | [color ]
Cream to yellow-brown | [Stability:]
Stable. Combustible. Incompatible with iron, strong oxidizing agents. | [Water Solubility ]
<0.1 g/100 mL at 23 ºC | [Merck ]
14,595 | [BRN ]
629516 | [LogP]
-1.7--1.42 at 25℃ | [CAS DataBase Reference]
81-11-8(CAS DataBase Reference) | [EPA Substance Registry System]
81-11-8(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C,Xn | [Risk Statements ]
R34:Causes burns.
R22:Harmful if swallowed. | [Safety Statements ]
S24/25:Avoid contact with skin and eyes .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S22:Do not breathe dust . | [RIDADR ]
UN 2583 | [RTECS ]
WJ6603000 | [TSCA ]
Yes | [HS Code ]
29215900 | [Hazardous Substances Data]
81-11-8(Hazardous Substances Data) |
| Hazard Information | Back Directory | [General Description]
Odorless yellowish microscopic needles or cream-colored powder. pH approximately 4.3 at 30 g/L water (suspension). | [Reactivity Profile]
4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACID(81-11-8) is incompatible with iron. 4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACID(81-11-8) forms sparingly water-soluble, crystalline salts with many bisquaternary ammonium bases. | [Air & Water Reactions]
Insoluble in water. | [Fire Hazard]
Flash point data for this chemical are not available; however, 4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACID is probably combustible. | [Chemical Properties]
Light Yellow Powder | [Uses]
In manufacture of dyes, bleaching agents. | [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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