Detail of "81-11-8"

CAS Number:
81-11-8
Name:
Benzenesulfonic acid,2,2'-(1,2-ethenediyl)bis[5-amino-
Superlist Name:
4,4'-Diamino-2,2'-stilbenedisulfonic acid
Molecular Structure:
Formula:
C₁₄H₁₄N₂O₆S₂
Molecular Weight:
370.39
Deleted CAS:
65941-98-2
Synonyms:
2,2'-Stilbenedisulfonicacid, 4,4'-diamino- (6CI,7CI,8CI);2,2'-Disulfo-4,4'-stilbenediamine;4,4'-Diaminostilben-2,2'-disulfonic acid;Amsonic acid;DASD;DSDacid;Diaminostilbenedisulfonic acid;Flavonic acid;NSC 163;p,p'-Diaminodiphenylethylene-o,o'-disulfonic acid;p,p'-Diaminostilbene-o,o'-disulfonic acid;
EINECS:
201-325-2
Density:
1.662 g/cm³
Melting Point:
300 °C
Solubility:
<0.1 g/100 mL at 23 °C in water
Appearance:
Light yellow powder
Hazard Symbols:
C, Xn
Risk Codes:
34-22
Safety:
24/25-45-36/37/39-26-22 Details
Transport Information:
UN 2583

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Reference

Effect of various additives on the photodegradation of polyurethane: Effect of various additives on the photodegradation of polyurethane. Osawa, Zenjiro; Tajima, Eiichi (Fac. Eng., Gunma Univ., Kiryu 376, Japan). Org. Coat.Chemical with cas number 61624-40-6 also plays role. Appl. Polym. Sci. Proc., 46, 532-7 (English) 1981. CODEN: OCAPDE. ISSN: 0732-7528. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) A no. of fluorescent dyes based on stilbene and coumarin derivs. were effective for retardation of the photodegrdn. of a polyurethane, and in some cases their effectiveness was comparable to that of Tinuvin 326. A polymer sample contg. 4,4'-diaminostilbene-2,2'-disulfonic acid [81-11-8] had breaking strength 479 kg/cm2 before irradn. and 387 kg/cm2 after irradn. and residual strength 80.8%, compared to 424, 188, and 44.3, resp., for a control contg. no additive. The stabilization by the fluorescent dyes is attributed to energy quenching. .

Fluorescent brightener soluble in an acid medium: Fluorescent brightener soluble in an acid medium. Prejmereanu, Ioan; Barbu, Mihai; Stoenescu, Caterian; Ivan, Florica (Intreprinderea de Medicamente si Coloranti "Sintofarm", Rom.). Rom. RO 79484 B 29 Apr 1983, 3 pp. (Romanian). (Romania). CODEN: RUXXA3. CLASS: IC: C09B027-02; B06L003-12. APPLICATION: RO 80-100715 4 Apr 1980. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 25, 28 Fluorescent brightener I(R = p-NaO3SC6H4O, M = Na)(II) [73398-53-5] is manufd. by reaction of I(R = Cl, M = H)(III) [4028-32-4] with p-hydroxybenzenesulfonic acid (IV) [98-67-9] at 100° and pH 8. Thus, a soln. contg. 8.5 parts 4,4'-diaminostilbene-2,2'-disulfonic acid [81-11-8] at pH 7 and concn. 80 g/L was added in 2-3 h to a suspension contg. cyanuric chloride [108-77-0] 18.45, ice 100, and water 50 parts, and the mixt. was neutralized to pH 6.5 at 8-10° with 10% aq. Na2CO3. After complete disappearance of free amine, 10.5 parts diethanolamine [111-42-2] was added, and the reaction mixt. was heated 5 h at 35-40° and pH 7.5-8 (NaOH) and salted out with 10% aq. NaCl to give III. A paste of III was heated 5 h at 100° and pH 8 (NaOH) with 17.4 parts IV to give 80 parts II.

Detail of "81-11-8"

Benzenesulfonic acid,2,2'-(1,2-ethenediyl)bis[5-amino-

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Reference