Bromocresol Green with CAS 76-60-8

CAS:76-60-8
EINECS:200-972-8
MF:C21H14Br4O5S
MW:698.01
Product name: Bromocresol green

Synonym: 3,3’,5,5’-Tetrabromo-m-cresosulfonaphthalein; 4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis(2,6-dibromo-3-methylphenol)s,s-dioxide; 4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis(2,6-dibromo-m-cresol)s,s-dioxide m-cresol; 4,4’-(3h-2,1-benzoxathiol-3-ylidene)bis(2,6-dibromo-,s,s-dioxidephenol

What is Bromocresol Green with CAS 76-60-8?

Bromocresol Green CAS 76-60-8 is slightly soluble in water and soluble in ethanol, ether, ethyl acetate, and benzene. Very sensitive to alkali, it turns a special blue-green color when encountering alkaline aqueous solutions. Bromocresol green can be used as an indicator, appearing yellow at pH 3.8 and blue-green at pH 5.4.

Specification

Items	Specification
PH(transition interval)	3.8(yellow green)-5.4(blue)
Maximum absorption wavelength (nm) λ1（PH 3.8） λ2 (PH 5.4)	440~445 615~618
Mass absorption coefficient, L/cm · g α1(λ1PH 3.8,dry sample) α2（λ2PH 5.4,dry sample)	24~28 53~58
Ethanol dissolution test	pass
Burning residue (calculated as sulfate)	≤0.25
Loss on drying	≤3.0

Application

1.Cell staining agent
2.Acid-base indicator, pH color change range 3.8 (yellow) to 5.4 (blue-green)
3.Acid base indicator. Its sodium salt is commonly used in colorimetric determination of acidity and alkalinity. Its sodium salt solution is used as a colorimetric agent for measuring pH value by spectrophotometry. Used as a reagent for thin layer chromatography to determine aliphatic hydroxyacids and alkaloids, and as an extraction and separation agent for photometric determination of quaternary ammonium cations.