Detail of "119-58-4"

Reference

Chromenoazaindolizines and their use in pressure- or heat-sensitive recording materials

Chromenoazaindolizines and their use in pressure- or heat-sensitive recording materials. Balli, Heinz; Gunzenhauser, Sigmund; Fletcher, Ian John; Bedekovic, Davor (Ciba-Geigy A.-G. , Switz.In this study， 504-29-0 and 88467-83-8 are also used.). Eur. Pat. Appl. EP 91402 A2 12 Oct 1983, 28 pp. DESIGNATED STATES: R: BE, CH, DE, FR, GB, IT, LI. (German). (European Patent Organization). CODEN: EPXXDW. CLASS: IC: C07D491-052; B41M005-16; B41M005-18. ICI: C07D491-052, C07D311-00, C07D231-00; C07D491-052, C07D311-00, C07D235-00. APPLICATION: EP 83-810127 28 Mar 1983. PRIORITY: CH 82-2124 6 Apr 1982. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 43 The title compds. of structure I or II are prepd., where R and R1 = H or (un)substituted alkyl, cycloalkyl, (un)substituted Ph, or (un)substituted benzyl; R2, R3, and R4 = H, halogen, lower alkyl, lower alkanoylamino, hydrocarbyloxy, or (un)substituted amino; and rings A and B may be substituted. I give lightfast blue, greenish blue, or green colors when in contact with an acidic developer. Thus, condensation of 2-(2-hydroxy-5-methylpheny)-1-azaindolizine perchlorate [88467-83-8] (prepn. described) with 4,4'-bis(dimethylamino)benzhydrol [119-58-4] in N-methylpyrrolidone at room temp. followed by oxidn. with K3Fe(CN)6 gave I (R = R1 = Me, R2 = R3 = H, R4 = NMe2) [88467-88-3], blue in contact with acidic dye. Other I and II were prepd. by the same method. Examples described the use of these compds. in heat- and pressure-sensitive recording materials. .

Visual chemical indicating composition for monitoring sterilization

Visual chemical indicating composition for monitoring sterilization. Tratnyek, Joseph P. (American Sterilizer Co., USA). U.S. US 4407960 A 4 Oct 1983, 8 pp. 126-00-1 and 21295-86-3 are cas registry numbers. These chemicals are also mentioned in this article. (English). (United States of America). CODEN: USXXAM. CLASS: IC: G01N021-06; C09K003-34. NCL: 436001000. APPLICATION: US 80-162811 25 Jun 1980. DOCUMENT TYPE: Patent CA Section: 63 (Pharmaceuticals) An indicator system and device for monitoring ethylene oxide [75-21-8] sterilization in which color changes are progressive with conditions and period of sterilization comprises a leuco precursor of an arylmethane dye and an acid. The compn. is integrated into a carrier and a polymer binder is used to form a coated ticket or tape device. Systems were prepd. using alc. sol. nylon or Et cellulose as polymer binders, Michler's hydrol [119-58-4] as leuco dye, 4,4-bis(4-hydroxyphenyl)pentanoic acid [126-00-1] or styrene-maleic anhydride polymer [9011-13-6] as acid component, and MeOH, CH2Cl2, or Me2CO as solvents. The systems change from a dark blue to colorless on sterilization by ethylene oxide. .