Safranine


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safranine

[′saf·rə‚nēn]
(organic chemistry)
Any of a group of phenazine-based dyes; some are used as biological stains.

Safranine

 

any of a class of azine dyes. The simplest safra-nine is phenosafranine, with the structural formula

where R1 = NH2 and R2 = R3 = R4 = H. Phenosafranine is a red dye formed in small quantities upon the oxidation of a mixture of aniline and p-phenylenediamine. It has very few uses.

Tolusafranine, referred to commercially as safranine (R1 = NH2; R2 = R4 = CH3; R3 = H), is a bright red basic dye. It is formed upon the oxidation of a mixture of aniline, o-toluidine, and p-tolylenediamine. Tolusafranine was used until the 1940’s as a dye for leather, paper, and textiles. Today, it has been almost completely replaced by dyes that are less expensive and more colorfast.

Pinakryptol (R1 = R2 = R4 = H; R3 = NH2) is a green dye obtained by the action on o-aminodiphenylamine of, first, picryl chloride and second, zinc with hydrochloric acid. It is used as a desensitizer in photography for lowering the sensitivity of photographic plates. All safranines are toxic.

M. A. CHEKALIN

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The trichome shields were centrifugated and stained for 1 hour in 1% Safranine and 0.03% Toluidine Blue in 0.1M Phosphate buffer at pH 7.
SHE'S referring to some of her untried, younger inmates, as the likes of Pawan, Safranine and Legal Set won't be going anywhere.
KEVIN DARLEY was fortunate to escape serious injury when thrown from Safranine in the parade ring before the 'Dog Moscrop 40 Years In Racing' Handicap at Catterick.
Finally, the mixture was colored with a safranine for 10-30 min, and dehydrated by using an alcohol solution with a different density.
In-form sprinter Safranine will almost certainly start too big because Stokell is on board.
This cell material was mounted in glycerine-gelatine stained with safranine or Bismark brown.
The race was won by 33-1 shot Safranine, trained by Ann Stokell, whose winners are few and far between but almost guaranteed to be at big odds.
Zorn, trained by Paul Howling and ridden by Shane Kelly, was well backed to reverse placings with Shifty Night in the six-furlong handicap, and got up in the final stride to see off Safranine.
Tenders are invited for Procurement Of Safranine Dye
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Stokell, who also partnered the gelding, said: 'That's my first winner as a jockey since I came back on New Year's Eve, and I think this could be my lucky track as Safranine also won here about 11 months ago.'