211761

m-Cresol Purple sodium salt

Dye content 90 %

• Synonym(s): m-Cresolsulfonphthalein sodium salt
• Empirical Formula (Hill Notation): C₂₁H₁₇NaO₅S
• CAS Number: 62625-31-4
• Molecular Weight: 404.41
• EC Number: 263-656-9
• MDL number: MFCD00010177
• UNSPSC Code: 12171500
• PubChem Substance ID: 24852706
• NACRES: NA.47

Properties

• form: powder
• composition: Dye content, 90%
• color: black
• λmax: 579 nm
• ε (extinction coefficient): ≥15000 at 433-439 nm in H₂O at 0.008 g/L
• application(s): diagnostic assay manufacturing; hematology; histology
• storage temp.: room temp
• SMILES string: [Na+].Cc1cc(O)ccc1\C(=C2\C=CC(=O)C=C2C)c3ccccc3S([O-])(=O)=O
• InChI: 1S/C21H18O5S.Na/c1-13-11-15(22)7-9-17(13)21(18-10-8-16(23)12-14(18)2)19-5-3-4-6-20(19)27(24,25)26;/h3-12,22H,1-2H3,(H,24,25,26);/q;+1/p-1/b21-18+;
• InChI key: BYQJYOOKENJSNK-GOSREXKOSA-M

Description

General description

m-cresol purple sodium salt (MCP) is a colorimetric pH indicator dye. The dye is blue in anionic form and yellow in protonated form.

Application

m-Cresol Purple sodium salt has been used to measure pH of seawater using a spectrophotometer.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves