Physical Properties
| Physical state at 20 °C | Solid | Odour | Odorless |
| Melting point/ Freezing point [°C] | 97°C | Solubility in water [% weight] | Slight (0.1-1%) |
| Colour | Pale yellow crystalline | Density [g/cm3] | 1.48 |
| Boiling point [°C] | 176 °C |
Packings
25g
5g
Safety Information and Hazard Symbols
Symbol: GHS05, GHS07
Signal Word: Danger
UN No.: 1663
IMCO Class No.: 6.1
Packing Group: III
Hazardous Statement: H302-H315-H318
Precaution Statement: P280-P305 + P351 + P338
Signal Word: Danger
UN No.: 1663
IMCO Class No.: 6.1
Packing Group: III
Hazardous Statement: H302-H315-H318
Precaution Statement: P280-P305 + P351 + P338
Specifications
| Appearance | Brownish yellow coloured powder |
Assay (acidimetric) | Min 99% |
| Melting point 95 – | 99 deg C |
| pH 6.6 – 8.6 | Colourless to yellow-orange |
| Absorption maxima (buffer pH 6.6) | 329 – 333 nm |
| Absorption maxima (buffer pH 11.0) | 389 – 393 nm |
| Specific absorptivity A1%/1cm (λmax; 0.05 g/L; buffer pH 6.6) | 130 – 150 |
| Specific absorptivity A1%/1cm (λmax; 0.05 g/L; buffer pH 11.0) | 100 – 120 |
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