Physical Properties
| Physical state at 20 °C | Solid | Odour | Odorless |
| Colour | Greenish black |
Packings
100g
25g
Safety Information and Hazard Symbols
Symbol: GHS05, GHS07
Signal Word: Danger
Hazardous Statement: H302-H318
Precaution Statement: P280-P305 + P351 + P338
Signal Word: Danger
Hazardous Statement: H302-H318
Precaution Statement: P280-P305 + P351 + P338
Specifications
| Appearance | Greenish black/blue crystalline powder |
| Absorption maxima in methanol (λmax1) | 640 – 648 nm |
| Absorption maxima in methanol (λmax2) | 522 – 525 nm |
| Specific absorptivity 1%/1cm (at λmax1) | Min 1100 |
| Specific absorptivity 1%/1cm (at lmax2) | Min 650 |
| Suitability (for microscopy) | Passes test |
| Loss on drying (at 110°C) | Max 10% |
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