| C.I.No | : | 11050 |
| Chemical Name | : | Janus Green B |
| CAS No. | : | 2869-83-2 |
| Chemical Formula | : | C30H31ClN6 |
| Molecular Weight | : | 511.07 gm/mole |
| Dye Content (Spectrophotometry) | : | >65% |
| Absorption Max (50% Ethanol) | : | 664 +/- 13nm |
| Absorptivity (A1%/1cm., in 50% Ethanol) | : | > 550 |
| Loss On Drying (110° c) | : | < 5% |
Rose bengal is a stain with a pink color. Its disodium salt form is commonly available in eye drops as a diagnostic agent when there is suspected damage to conjunctival and corneal cells. It is also used in laboratory settings, including the preparation of Foraminifera for microscopic analysis and suppression of bacterial growth in several microbiological media. The clinical applications of rose bengal as injectable formulation under the name PV-10 in melanoma, breast cancer and skin conditions such as eczema and psoriasis are being investigated in clinical trials.
Bromocresol Green (BCG) is a pH sensitive triphenylmethane dye useful in a variety of colorimetric detection technologies. BCG is used as a tracking dye for DNA agarose gel electrophoresis, in protein determinations and in charge-transfer complexation processes. In TLC BCG is used for visualisation of the compounds with functional groups whose pKa is below 5.0.
Thymolphthalien is an acid-base indicator which is colorless in acidic form and deep blue in basic form. Acidic form retains hydrogen on each hydroxyl group. It is suitable in preparing disappearing ink.
Thymolphthalein was suitable as indicator during titration of hyamine hydroxide.
Bromothymol Blue (also known as bromothymol sulfone phthalein and BTB) is a pH indicator. It is mostly used in applications that require measuring substances that would have a relatively neutral pH (near 7). A common use is for measuring the presence of carbonic acid in a liquid. It is typically sold in solid form as the sodium salt of the acid indicator.
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