114472

Cresol red

indicator grade, Dye content 95 %

• Sinónimos: o-Cresolsulfonphthalein
• Fórmula empírica (notación de Hill): C₂₁H₁₈O₅S
• Número de CAS: 1733-12-6
• Peso molecular: 382.43
• Beilstein: 343399
• Número CE: 217-064-2
• Número MDL: MFCD00005878
• Código UNSPSC: 12171500
• ID de la sustancia en PubChem: 24847173
• NACRES: NA.47

Propiedades

• grado: indicator grade
• Nivel de calidad: 200
• formulario: powder or crystals
• composición: Dye content, 95%
• técnicas: titration: suitable
• color: red-brown
• pH: 7.2-8.8, yellow to red
• intervalo de pH útil: 1.8-2.0, orange to yellow(acid); 7.0-8.8, yellow to violet(alkaline)
• mp: 290 °C
• densidad: 0.998 g/cm³
• λmáx.: 367 nm (2nd); 570 nm
• aplicaciones: diagnostic assay manufacturing; hematology; histology
• temp. de almacenamiento: room temp
• cadena SMILES: Cc1cc(ccc1O)C2(OS(=O)(=O)c3ccccc23)c4ccc(O)c(C)c4
• InChI: 1S/C21H18O5S/c1-13-11-15(7-9-18(13)22)21(16-8-10-19(23)14(2)12-16)17-5-3-4-6-20(17)27(24,25)26-21/h3-12,22-23H,1-2H3
• Clave InChI: OBRMNDMBJQTZHV-UHFFFAOYSA-N

Descripción

Descripción general

Cresol Red, also known as o-cresol red, belongs to the phthalein and sulphonphthalein group of dyes. Cresol red changes color from orange to yellow at pH between 0.2-1.8 and yellow to violet at pH between 7.0-8.8. In alkaline solutions, cresol red is present as a hydrophilic dianion. The dianion is small and is violet in color, possessing a larger conjugated system than the yellow hydroxyquinone.

Aplicación

Cresol Red is a widely used pH indicator for routine pH assessments like microbial culture media preparations. In addition, Cresol red is a suitable constituent of PCR reagent systems. Cresol Red is used as a tracking dye in DNA, RNA (agarose), and protein (polyacrylamide) electrophoresis.

Información de seguridad

• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 3
• Equipo de protección personal: dust mask type N95 (US), Eyeshields, Gloves