Detail of > 89-36-1
- CAS Number:
- 89-36-1
- Name:
3-Methyl-1-(4-sulfophenyl)-2-pyrazolin-5-one
- Formula:
- C10H10N2O4S
- Molecular Structure:
- Synonyms:
- Benzenesulfonicacid, p-(3-methyl-5-oxo-2-pyrazolin-1-yl)- (7CI,8CI);1-(4'-Sulfophenyl)-3-methyl-5-pyrazolone;1-(p-Sulfophenyl)-3-methyl-5-pyrazolone;1-(p-Sulfophenyl)-3-methylpyrazolin-5-one;3-Methyl-1-(4-sulfophenyl)-5-pyrazolone;3-Methyl-1-(4-sulfophenyl)pyrazolin-5-one;3-Methyl-1-(p-sulfophenyl)-2-pyrazolin-5-one;3-Methyl-1-(p-sulfophenyl)-5-pyrazolone;3-Methyl-1-phenyl-5-pyrazolone-4'-sulfonic acid;4-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulfonic acid;Benzenesulfonic acid, 4-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-;Pyrazoline G;p-(3-Methyl-5-oxo-2-pyrazolin-1-yl)benzenesulfonic acid;
- Molecular Weight:
- 254.26
- EINECS:
- 201-901-3
- Density:
- 1.53 g/cm3
- Melting Point:
- >252 °C (dec.)(lit.)
- Solubility:
- 5 g/L (20 °C) in water
- Appearance:
- Beige powder
- Hazard Symbols:
C- Risk Codes:
- 34
- Safety:
- 26-36/37/39-45Details
- Transport Information:
- UN 1759 8/PG 2
- Deleted CAS:
- 74583-53-2
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Reference
- Oxonol antihalation dyes
- Oxonol antihalation dyes. Szczerek, Ireneusz; Tymowska, Jolanta (Instytut Przemyslu Organicznego, Pol.).In this study，122-51-0 is also used. Pol. PL 117585 B1 15 Oct 1984, 2 pp. (Polish). (Poland). CODEN: POXXA7. CLASS: IC: C09B023-00. APPLICATION: PL 78-211655 11 Dec 1978.In this article, certain chemicals are used. One of their cas registry numbers is 122-51-0 DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) The title dyes I (R = PhO, SO3H, CO2H; R1 = H, SO3H; R2 = H, Me; n = 0, 1) are prepd. by reacting 1-aryl-3-methyl-5-pyrazolone with HC(OEt)3 [122-51-0], or HC(OEt)3 and Me2CO [67-64-1], in DMF [68-12-2] contg. AcOK [127-08-2]. The presence of AcOK and HC(OEt)3 in DMF increases the yield of the dyes and facilitates their sepn. from the reaction mixt. Thus, 25 g 3-methyl-1-(p-sulfophenyl)-5-pyrazolone [89-36-1] and 20 g AcOK were dissolved in boiling DMF, treated with 35 mL HC(OEt)3, and heated for 20 min. Addn. of 130 mL MeOH pptd. I (R = SO3K, R1 = R2 = H, n = 0) [94266-02-1] (22 g, 90% yield) having lmax = 435 (H2O) and log emax = 4.3758. ..
- Monoazo dyes
- Monoazo dyes. Brierley, David; Ridyard, Denis Robert Annesley; Yelland, Michael (Imperial Chemical Industries Ltd., Engl.). Ger. Offen. DE 2714740 6 Oct 1977, 10 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C09B029-38. PRIORITY: GB 76-13301 1 Apr 1976. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Azo dye I [64768-02-1], dyeing polyamide fibers a fast yellow shade, is prepd. by diazotizing 4-aminobenzenesulfonanilide [127-77-5] and coupling with 1-(4-sulfophenyl)-3-methyl-5-pyrazolone [89-36-1].
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