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1733-12-6 - Cresol Red - o-Cresolsulfonephthalein - A17243 - Alfa Aesar

A17243 Cresol Red

Número CAS
1733-12-6
Nombre Alternativo
o-Cresolsulfonephthalein

Tamaño Precio ($) Cantidad Disponibilidad
25g 49,30
100g 150,00
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Cresol Red

MDL
MFCD00005878
EINECS
217-064-2

Propiedades químicas

Fórmula
C21H18O5S
Peso molecular
382.44
Punto de fusión
>300°
Solubilidad
Soluble in water (slightly at 20°C), 50% ethanol (0.1%), dil. acids, and dil. alkalis. Insoluble in benzene.

Aplicaciones

Cresol red is commonly used with lead acetate for the detection of urease after PAGE. It is also used as an indicator with the following transition intervals: pH 1.8 (orange) to pH 2.0 (yellow); pH 7.0 (yellow) to pH 8.8 (violet). Cresol Red is used as a tracking dye in DNA, RNA (agarose) and protein (polyacrylamide) electrophoresis. In agarose, Cresol Red runs with an apparent molecular size of approx. 125 bp DNA. Cresol Red does not inhibit Taq polymerase.

Notas

Transition interval (acid): pH 1.8 (orange) to pH 2.0 (yellow); (alkaline) pH 7.0 (yellow) to pH 8.8 (violet)

Referencias documentales

Robert H. Byrne.; Jabe A. Breland. High precision multiwavelength pH determinations in seawater using cresol red. Deep Sea Research Part A. Oceanographic Research Papers. 1989, 36 (5), 803-810.

M. Neus Piña.; M. Carmen Rotger.; Antoni Costa.; Pablo Ballester.; Evaluation of anion selectivity in protic media by squaramide-Cresol Red ensembles. Pere M. Deyà. Tetrahedron Lett. 2004, 45 (19),3749-3752.

Acid-base indicator: pH 0.2 - 1.8; 7.0 - 8.8.

Indicaciones de peligro y de precaución del GHS

Indicaciones de peligro (UE): H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Indicaciones de precaución: P261-P280-P305+P351+P338-P304+P340-P362-P312-P321-P405-P403+P233-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Take off contaminated clothing and wash before reuse. Call a POISON CENTER or doctor/physician if you feel unwell. Specific treatment (see label). Store locked up. Store in a well-ventilated place. Keep container tightly closed. Dispose of contents/container in accordance with local/regional/national/international regulations.

Otras referencias

Merck
14,2578
Beilstein
343399
Código de tarifa arancelaria unificado
2934.99
TSCA
Yes

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