| | Identification | More |  | [Name] 
 Cresol Red
 |  | [CAS] 
 62625-29-0
 |  | [Synonyms] 
 2-CRESOLSULFONEPHTHALEIN SODIUM SALT
 CRESOL RED
 CRESOL RED SODIUM SALT
 CRESOL RED, WATER SOLUBLE
 LABOTEST-BB LT00159735
 O-CRESOL RED, WATER SOLUBLE
 O-CRESOLSULFONEPHTHALEIN SODIUM SALT
 O-CRESOLSULFONPHTHALEIN
 O-CRESOLSULFONPHTHALEIN SODIUM SALT
 PHENOL, 4,4'-(3H-2,1-BENZOXATHIOL-3-YLIDENE)BIS[2-METHYL-, S,S-DIOXIDE, MONOSODIUM SALT
 SODIUM 2-[(4-HYDROXY-3-METHYLPHENYL)(3-METHYL-4-OXO-2,5-CYCLOHEXADIEN-1-YLIDENE)METHYL]BENZENESULFONATE
 SODIUM CRESOL RED
 SODIUM O-CRESOLSULFONEPHTHALATE
 TIMTEC-BB SBB006478
 phenol,4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis[2-methyl-,s,s-dioxide,monosod
 Cresolsodiumsalt
 o-Cresol Red, sodium salt
 o-Cresolsulphonephthalein sodium salt
 Sodium hydrogen 4,4'-(3H-2,1-benzoxathiol-3-ylidene)bis(2-methylphenolate) S,S-dioxide
 CRESOL RED, SODIUM SALT, INDICATOR GRADE
 |  | [EINECS(EC#)] 
 263-654-8
 |  | [Molecular Formula] 
 C21H17NaO5S
 |  | [MDL Number] 
 MFCD00001618
 |  | [Molecular Weight] 
 404.41
 |  | [MOL File] 
 62625-29-0.mol
 | 
 | Chemical Properties | Back Directory |  | [Appearance] 
 Brown powder
 |  | [Melting point ] 
 250 °C (dec.)(lit.)
 |  | [storage temp. ] 
 Store at RT.
 |  | [solubility ] 
 Solubility Soluble in water, ethanol
 |  | [form ] 
 Powder
 |  | [pka] 
 1.0(at 25℃)
 |  | [color ] 
 Brown
 |  | [PH Range] 
 0.2 (red) - 1.8 (yellow) and 7.2 (yellow) - 8.8 (red)
 |  | [Water Solubility ] 
 SOLUBLE
 |  | [λmax] 
 425nm
 |  | [Major Application] 
 Thermochromic materials, cosmetics, measurement of hydrophobicity of
therapeutic drugs
 |  | [InChI] 
 InChI=1S/C21H18O5S.Na.H/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;;
 |  | [InChIKey] 
 OUMMIBMDWMSXKF-UHFFFAOYSA-N
 |  | [SMILES] 
 O=S1(C2C=CC=CC=2C(C2C=CC(O)=C(C)C=2)(C2C=CC(O)=C(C)C=2)O1)=O.[NaH]
 |  | [CAS DataBase Reference] 
 62625-29-0(CAS DataBase Reference)
 |  | [EPA Substance Registry System] 
 62625-29-0(EPA Substance)
 | 
 | Safety Data | Back Directory |  | [Hazard Codes ] 
 Xn
 |  | [Risk Statements ] 
 R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
 R36/37/38:Irritating to eyes, respiratory system and skin .
 |  | [Safety Statements ] 
 S22:Do not breathe dust .
 S24/25:Avoid contact with skin and eyes .
 S36:Wear suitable protective clothing .
 S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
 |  | [WGK Germany ] 
 3
 
 |  | [TSCA ] 
 Yes
 |  | [HS Code ] 
 29147000
 | 
 | Hazard Information | Back Directory |  | [Chemical Properties] 
 Brown powder
 |  | [Uses] 
 Cresol Red sodium salt acts as a constituent of polymerase chain reaction reagent systems. It is useful as a pH indicator with color changes with pH 0.2 - pH 1.8 and pH 7.1 - 8.8. Further, it plays an important role in molecular biology reactions in place of other loading dyes.
 |  | [Biological Activity] 
 Cresol Red is used as a pH indicator.
 | 
 |  |