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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SHE'S referring to some of her untried, younger inmates, as the likes of Pawan, Safranine and Legal Set won't be going anywhere.
Safranine reared up suddenly and Darley said: "He just went up and knocked me backwards out of the saddle and the only other thing I remember is being on the ground with legs flailing all over the place.
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.
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.
Blackheath, Madrasee, Safranine and Tuscan Flyer come here having captured their latest races, while Texas Gold can probably be counted unlucky not to fit into that category after finishing second at Kempton on his most recent run.
The six-furlong handicap went to the 33-1 chance Safranine, trained by Ann Stokell and ridden by Pat Mathers.
Ann Stokell made it a happy return to the course when saddling Safranine to land the sprint handicap under a positive ride from Dominic Fox.
five-year-old, trained by Bob Cowell, bounded home a length and a half clear of Safranine, with My American Beauty just a short head back in third.
KEVIN DARLEY escaped serious injury after Safranine reared up and unseated him in the paddock before the five-furlong handicap, writes Colin Russell.