Identity
Classification
- Categories
- Indicators primary
Technical Data
Properties
| Property | Value | Unit |
|---|---|---|
| Physical state at 20 °C | Solid | — |
| Colour | Dark green powder | — |
| Odour | Odorless | — |
| pH value | 3.1 | — |
| Melting point/ Freezing point [°C] | 290 °C | °C |
| Solubility in water [% weight] | Soluble in water | — |
These are recorded catalogue property values. Product specification limits, where available, are listed under Specifications.
Specifications
| Parameter | Specification | Unit |
|---|---|---|
| Appearance | Dark green powder | — |
| Dye content (by spectrophotometry) | Min 60 % | % |
| Transition range (pH 6.8 - 8.0) | Violet Red - Yellow | — |
| Solubility | Clear solution | — |
| Absorption maxima (50% ethanol + 2 ml acetic acid) | 539 - 544 nm | nm |
| Absorptivity (A 1%/1cm; at λmax; in 50% ethanol + 2 ml acetic acid) | Min 900 | — |
| Loss on drying (110 °C) | Max 12 % | % |
Packaging
| Pack size | SKU |
|---|---|
| 10 g | RA001905-PK-10G |
| 25 g | RA001905-PK-25G |
| 100 g | RA001905-PK-100G |
| 1 kg | RA001905-PK-1KG |