Yellow pinacryptol ( 6-ethoxy-1-methyl-2- (3-nitro-β-styryl) quinoline methyl sulfate ) is an organic compound , a quinoline dye with the chemical formula C 21 H 22 N 2 O 7 S. Used as a desensitizer in photography.
| Pinacriptol yellow | |
|---|---|
| General | |
| Chem. formula | C 21 H 22 N 2 O 7 S |
| Molar mass | |
| Thermal properties | |
| T. melt. | 252—254 ° C |
| Classification | |
| Reg. CAS number | |
| PubChem | |
| Reg. EINECS number | |
| Smiles | |
| Inchi | |
| ChemSpider | |
Content
- 1 Physical and chemical properties
- 2 Getting
- 3 Application
- 4 notes
- 5 Literature
Physical and chemical properties
Yellow needles with a melting point of 252–254 ° С [2] .
Getting
From methyl sulfate of 6-ethoxyquinaldine and 3-nitrobenzaldehyde [3] .
Application
It is used in photography as a desensitizer, usually in the form of a separate bath in front of the developer, where pinacriptol yellow is contained in the form of an aqueous solution. As a rule, it cannot be added to the developer, as some other sensitizers (for example, pinacryptol green ), as it reacts with sodium sulfite , causing a strong veil [4] .
It is used in analytical chemistry for the determination of alkyl sulfates and alkyl sulfonates by thin layer chromatography . When a wet chromatogram was processed by spraying a solution containing pinacryptol yellow, these compounds on the chromatographic plate were isolated either by intense orange-yellow fluorescence or dark brown spots in ultraviolet light against a general pale glow [5] .
Notes
- ↑ 1 2 PubChem
- ↑ Berckenheim, 1942 , p. 229.
- ↑ Berckenheim, 1942 , p. 223-229.
- ↑ Gurlev, 1988 , p. 104-105.
- ↑ Gašparič, 1978 , p. 265.
Literature
- Berkenheim A.M. Workshop on synthetic medicinal and aromatic substances and photoreactive. - M., L .: State Scientific and Technical Publishing House of Chemical Literature, 1942.
- Gurlev D.S. Reference book on photography (processing of photographic materials). - K .: Tekhnika, 1988.
- Gašparič J., Churáček J. Laboratory handbook of paper and thin-layer chromatography . - Chichester: Halsted Press, 1978.