CRESOL RED INDICATOR GRADE (C005B-022045)

General description

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.

Application

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.

Molecular Weight: 382.43. Empirical Formula: C₂₁H₁₈O₅S. grade: indicator grade. Quality Level: 200. form: powder or crystals. composition: Dye content, 95% . technique(s): titration: suitable. pH: 7.2-8.8, yellow to red. useful pH range: 1.8-2.0, orange to yellow(acid), 7.0-8.8, yellow to violet(alkaline). mp: 290 . °C. density: 0.998 . g/cm³. λ. _max: 367 nm (2nd), 570 nm. application(s): diagnostic assay manufacturing
hematology
histology. storage temp.: room temp. SMILES string: 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. InChI key: OBRMNDMBJQTZHV-UHFFFAOYSA-N. Storage Class Code: 11 - Combustible Solids. WGK: WGK 3. Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves.