Primulin

Structural formula
General
Surname	Primulin
other names	Direct Yellow 59 Direct Yellow 7 CI 49010 Carnotine Primrose yellow
Molecular formula	C 21 H 14 N 3 NaO 3 S 3
External identifiers / databases
CAS number 10360-31-3 8064-60-6 EC number 233-781-3 ECHA InfoCard 100,030,698 PubChem 3769888 Wikidata Q7243701
properties
Molar mass	475.54 g mol −1
Melting point	> 300 ° C
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Primulin is a direct dye from the group of thiazole dyes , which contains two benzothiazole ring systems.

Extraction and presentation

Primulin yellow can be obtained by sulphonation of the primulin base . This can be represented by dehydrothiotoluidine from para-toluidine and sulfur.

use

Primulin has been known for dyeing cotton since the mid-19th century. It was first used in 1935 as a vital stain . Primulin is particularly good at staining pollen .

Individual evidence

1. ↑ ^{a b} Datasheet Primuline, Dye content 50% from Sigma-Aldrich , accessed on November 7, 2014 ( PDF ).
2. ↑ Rajbir Singh: Synthetic Dyes . Mittal Publications, 2002, ISBN 81-7099-832-8 , pp. 174 f . ( limited preview in Google Book search).
3. ^ Rudolf Nietzki : Chemistry of the organic dyes . 1906, p. 289 ( limited preview in Google Book search).
4. ↑ Paul Ruggli , Sal. Max Pestalozzi: About the cotton affinity of derivatives of dehydro-thiotoluidine and primulin. (V. Communication on dyeing processes) . In: Helvetica Chimica Acta . tape 9 , no. 1 , 1926, pp. 364–378 , doi : 10.1002 / hlca.19260090142 ( PDF ).
5. ^ FWD Rost: Fluorescence Microscopy . Cambridge University Press, 1995, ISBN 0-521-41088-6 , pp. 350 f . ( limited preview in Google Book search).