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

A17243 Cresol Red

Numéro CAS
1733-12-6
Synonymes
o-Cresolsulfonephthalein

Dimensions Prix ($) Quantité Disponibilité
25g 49,30
100g 150,00
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Cresol Red

MDL
MFCD00005878
EINECS
217-064-2

Propriétés chimiques

Formule
C21H18O5S
Poids formulaire
382.44
Point de fusion
>300°
Solubilité
Soluble in water (slightly at 20°C), 50% ethanol (0.1%), dil. acids, and dil. alkalis. Insoluble in benzene.

Applications

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.

Notes

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

Références bibliographiques

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.

Mentions de danger et de prudence du SGH

Mentions de danger (UE): H315-H319-H335

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

Mentions de prudence: 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.

Autres références

Merck
14,2578
Beilstein
343399
Code tarifaire harmonisé
2934.99
TSCA
Yes

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Catalyseurs

Analytique et matériel de laboratoire