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CAS:76-60-8
EINECS:200-972-8
HÌNH 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
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.
| Mục | Đặc điểm kỹ thuật |
| PH(transition interval) | 3.8(yellow green)-5.4(blue) |
| Tối đa thu sóng (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) | Toán 0.25
|
| Mất trên làm khô | Toán 3.0 |
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.
1 kg/bag
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