Chemical Name: Bromocresol green
CAS: 76-60-8
Molecular Formula: C21H14Br4O5S
Molecular weight: 698.01
Appearance: Yellow crystal
Bromocresol Green Cas 76-60-8
Description
Bromocresol green quick Details
Chemical Name: Bromocresol green
Other Name: bromo cresol green; Tetrabromo-m-cresolphthalein sulfone; 3′,3”,5′,5”-Tetrabromo-m-cresolsulfonephthalein; BCG
CAS: 76-60-8
Molecular Formula:C21H14Br4O5S
Molecular weight:698.01
Appearance: Yellow crystal
Bromocresol Green Specifications
| Item | Specifications |
| PH Color change interval | 3.8 (yellow-green)-5.4 (blue) |
| Maximum absorption wavelength/nm
⋌ 1(PH=3.8) ⋌ 2(PH=5.4) |
440-445
615-618 |
| Mass absorption coefficient/[L/（cm ·g）]
a1 ( λ 1 ·PH=3.8 ，dry sample) a2 ( λ2 ·PH=5.4 ，dry sample) |
24~28
53~58 |
| Maximum impurity content/% Ethanol solution experiment
Loss on drying Ignition residue(In terms of sulfate) |
Conforms
3.0 0.25 |
Bromocresol Green Typical Properties
| Item | Specifications | Results |
| Assay (%) | ≥98.5 | 98.9 |
| PH Color change interval | 3.8 (yellow-green)-5.4 (blue) | Pass test |
| Maximum absorption wavelength (mm) | λ1 (PH3.8)440-445 | 442 |
| λ2 (PH5.4) 615-618 | 616 | |
| Mass absorption coefficient, L/(cm.g) | α1(λ1, PH3.8 dry sample) 24-28 | 25 |
| α2(λ1, PH5.4 dry sample) 53-58 | 55 | |
| Ethanol dissolved test | Pass test | Pass test |
| Loss on drying | ≤3.0 | 2.1 |
| Residue on ignition (as SO4)% | ≤0.25 | 0.25 |
| Conclusion | The results conforms with HG/T4017-2008 indicator | |
Bromocresol green Application
This product is used as acid-base indicator and cell staining agent.
Bromocresol Green Shelf Life, package and Delivery
Shelf life: 24 months from date of manufacture in original unopened packaging stored in a cool dry place out of direct sunlight.
Package: 10kg/25kg/drum.
Delivery as common product.