Detail of "3176-77-0"

CAS Number:
3176-77-0
Name:
Naphtho[1,2-d]thiazolium,2-methyl-1-(3-sulfopropyl)-, inner salt
Molecular Structure:
Formula:
C₁₅H₁₅NO₃S₂
Molecular Weight:
321.41
Synonyms:
2-Methyl-1-(3-sulfopropyl)naphtho[1,2-d]thiazoliumhydroxide, inner salt (7CI);Naphtho[1,2-d]thiazolium,2-methyl-1-(3-sulfopropyl)-, hydroxide, inner salt (8CI);2-Methyl-3-(3-sulfopropyl)-b-naphthothiazolium betaine;2-Methyl-3-(g-sulfopropyl)naphtho[1,2-d]thiazolium betaine;
EINECS:
221-646-1
Melting Point:
258-264 °C
Appearance:
beige fine crystalline powder
Safety:
24/25 Details

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Mesoalkylnaphtho[1,2-d]thiacarbocyanine photographic sensitizers: Mesoalkylnaphtho[1,2-d]thiacarbocyanine photographic sensitizers. Vavrova, Jaroslava (Czech. ). Czech. CS 166537 15 Dec 1976,3 pp. (Unavailable). (Czechoslovakia). CODEN: CZXXA9. CLASS: IC: G03C001-10. APPLICATION: CS 74-608 30 Jan 1974. DOCUMENT TYPE: Patent CA Section: 40 (Dyes, Fluorescent Whitening Agents, and Photosensitizers) Anhydro-4,5,4',5'-dibenzo-9-ethyl-3,3'-bis(.gamma.-sulfopropyl)thiacarb ocyanine hydroxide (I) [4622-66-6], a sensitizer for Ag halide photog. emulsions, was prepd. in 59.2% yield and sufficient purity by 2-step synthesis in m-cresol [108-39-4]. Thus, the soln. of methylene base prepd. from 2-methyl-3-(.gamma.-sulfopropyl)naphtho[1,2-d]thiazolium betaine [3176-77-0] and Et3N in m-cresol was treated with 2-(2-ethoxy-1-butenyl)-1-(3-sulfopropyl)naphtho[1,2-d]thiazolium hydroxide inner salt [16470-41-0] at 95-105.degree. and added to Me2CO to ppt. I.