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SZSE：002741
Chemical Reagents
Cresol redCOA Report
  • CAS No.： 1733-12-6
  • Molecular weight：382.44
  • Aliases：o-Cresolsulfonphthalein; 4,4'-(3H-2,1-Benzoxathiol-3-ylidene)bis(2-methylphenol) S,S-dioxide
  • Molecular formula：C21H18O5S
  • EC No.：217-064-2
  • HS-No：2907121200
Information
Specification category：
Product No. Product name specifications
1.28043.020 Cresol red IND25g
Technical indicators：
Item Ind
Transition range 6.5yellow~8.5purple
Absorption maximum λmax,nm --
λ1(pH6.5) 432~436
λ2(pH8.5) 571~574
Spec.Absorptivity ɑ(L/cm.g) --
ɑ1(λ1,pH6.5,dry sample) 49~67
ɑ2(λ2,pH8.5,dry sample) 100~132
Solubility in ethanol Pass
Loss on drying ≤3.0%
Residue on ignition(as SO4) ≤0.2%
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