What does Bromophenol Blue do?
Bromophenol blue is useful as a tracking dye in electrophoresis, an industrial dye, a laboratory acid-base indicator and a biological stain. In gel electrophoresis Bromophenol Blue can be used as a color marker and as as a biological stain. Bromophenol Blue can be used to stain proteins and nucleic acids.
What Colour does bromophenol blue turn in acid?
As an acid–base indicator, its useful range lies between pH 3.0 and 4.6. It changes from yellow at pH 3.0 to blue at pH 4.6; this reaction is reversible. Bromophenol blue is structurally related to phenolphthalein (a popular indicator).
What color is bromophenol blue?
yellow
| Indicator | pH Range | Acid |
|---|---|---|
| 6.0 Bromocresol purple | 5.2-6.8 | yellow |
| 7.0 Bromophenol blue | 3.0-4.6 | yellow |
| 8.0 Bromothymol blue | 6.0-7.6 | yellow |
| 9.0 Chlorophenol red | 4.8-6.4 | yellow |
Why is my bromophenol blue yellow?
Bromophenol Blue is a pH indicator dye that turns yellow under acidic conditions. Bromophenol Blue has a pI below pH 4.0. The concentrated dye solution may have a reddish or greenish cast to the color. If the pH gradient of the gel includes the pI of the dye, it will turn yellow at its pI.
Is bromophenol blue the same as Bromothymol blue?
These indicators are normally used over a fairly short range of pH values (indicated in the table above). As a pH indicator, bromothymol blue, for example, would be useful between from about pH 6.0 to pH 7.6….
| Indicator | Bromophenol blue |
|---|---|
| Low pH color | yellow |
| Transition pH range | 3.0–4.6 |
| High pH color | purple |
What size does bromophenol blue run at?
Bromophenol blue (BPB) is most commonly used as an agarose gel electrophoresis size marker. In a 1% gel it runs at around 500bp but the higher % of the gel the lower it will run.
Is thymol blue carcinogenic?
Not available. Carcinogenicity: CAS# 76-61-9: Not listed by ACGIH, IARC, NTP, or CA Prop 65.
How do you dispose of DTT?
Vacuum dust with equipment fitted with a HEPA filter and place in a closed, labeled waste container. Dispose of via a licensed waste disposal contractor. Note: see Section 1 for emergency contact information and Section 13 for waste disposal.