| Identification | Back Directory | [Name]
Cresol Purple | [CAS]
2303-01-7 | [Synonyms]
Nsc 9607
BETZ 0420
CRESOL PURPLE
m-Cresolpurpl
3-cresolpurple
M-CRESOL PURPLE
METACRESOL PURPLE
pourpredem-cresol
Cresol Purple, M-
M-CRESOLSULFONPHTHALEIN
M-CRESOLSULFONEPHTHALEIN
M-CRESOL PURPLE FREE ACID
M-CRESOL PURPLE INDICATOR
M-CRESOL PURPLE INDICATOR 5 G
cresolpurple(non-specificname)
M-CRESOL PURPLE, INDICATOR GRADE
Cresol purple solution 0.04 % pH
m-CRESOL PURPLE (pH indicator) AR
m-Cresol Purple,pure,indicator grade
M-CRESOL PURPLE, INDICATOR GRADE, PURE
M-Cresol Purple, indicator grade, pure 5GR
m-Cresol Purple sodium salt, 0.04% w/v aq. soln.
4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis(m-cresol)s,s-dioxide
M-cresol, 4,4′-(3h-2,1-benzoxathiol-3-ylidene)di-, S,s-dioxide
3,3-Bis(4-hydroxy-2-methylphenyl)-3H-2,1-benzoxathiole 1,1-dioxide
4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis(3-methylphenol)s,s-dioxide
Phenol, 4,4-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis3-methyl-
Phenol,4,4’-(3H-2,1-benzoxathiol-3-ylidene)bis(3-methyl-,S,S-dioxide
phenol,4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis[3-methyl-,s,s-dioxide
3,3-Bis(4-hydroxy-2-Methylphenyl)-3H-benzo[c][1,2]oxathiole 1,1-dioxide
O-toluenesulfonic Acid,α-hydroxy-α,α-bis(4-hydroxy-o-tolyl)-, Γ-sultone | [EINECS(EC#)]
218-960-6 | [Molecular Formula]
C21H18O5S | [MDL Number]
MFCD00005871 | [MOL File]
2303-01-7.mol | [Molecular Weight]
382.43 |
| Chemical Properties | Back Directory | [Appearance]
green crystalline powder | [Melting point ]
>250°C | [Boiling point ]
577.5±50.0 °C(Predicted) | [bulk density]
480kg/m3 | [density ]
1.404±0.06 g/cm3(Predicted) | [storage temp. ]
room temp | [solubility ]
Very slightly soluble in water, ethanol; soluble in methanol | [form ]
Liquid | [pka]
1.51, 8.32(at 25℃) | [color ]
Dark green | [PH Range]
1.2 (red) - 2.8 (yellow) and 7.4 (yellow) - 9.0 (purple) | [Stability:]
Stable. Incompatible with strong oxidizing agents. | [Water Solubility ]
Soluble in water and sodium hydroxide solution. Slightly soluble in alcohol. | [ε(extinction coefficient)]
≥ 11000 at 295-301nm at 0.01g/L (0.01 G/L in 0.005 N NAOH in Methanol)
≥26000 at 578-584nm at 0.01g/L (in 0.005 N NAOH in Methanol)
≥8000 at 369-375nm at 0.01g/L (in 0.005 N NAOH in Methanol) | [λmax]
579nm, 371nm | [Merck ]
14,2577 | [BRN ]
350314 | [Major Application]
Fuel cells, sensors, display device, falsification-proof security paper, inks, correction fluid, paints, detection of electrophilic gases, lubricants, cement products, packaging system, adhesive, cosmetics, food storage, determining glucose in dialysis solution, screening of cat diseases, detecting carbohydrates, oral hygiene products | [InChI]
1S/C21H18O5S/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)26-21/h3-12,22-23H,1-2H3 | [InChIKey]
OLQIKGSZDTXODA-UHFFFAOYSA-N | [SMILES]
Cc1cc(O)ccc1\C(=C2/C=CC(=O)C=C2C)c3ccccc3S(O)(=O)=O | [EPA Substance Registry System]
Phenol, 4,4'-(1,1-dioxido-3H- 2,1-benzoxathiol-3-ylidene) bis[3-methyl-(2303-01-7) |
| Hazard Information | Back Directory | [Chemical Properties]
green crystalline powder | [Uses]
Acid-base indicator. | [Biochem/physiol Actions]
m-Cresol purple is a pH indicator. It changes from red (pH 1.2) to yellow (2.8) and yellow (7.4) to purple (9.0). |
| Safety Data | Back Directory | [Safety Statements ]
24/25 | [WGK Germany ]
WGK 2 water endangering | [TSCA ]
Yes | [HS Code ]
29309090 | [Storage Class]
11 - Combustible Solids |
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