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SELENOUS ACID Extra Pure Confirms to USP Selenious acid
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Specification
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General
Description
| Article No. | RC0001 | Grade | Extra Pure |
| Purity | 93% | CAS No. | 7783-00-8 |
| Molecular Formula | H2SeO3 | Molecular Weight | 128.97 |
| H.S. Code | 2811.1990 | Shelf Life | 60 Months |
Physical Properties
| Physical state at 20 °C | Solid | Colour | White crystalline | ||||
| pH value | 7 | Melting point/ Freezing point [°C] | 70 °C | ||||
| Density [g/cm3] | 3.004 | Solubility in water [% weight] | Soluble in cold water | ||||
Specifications
| Appearance | White crystalline powder | Assay (as H2SeO3) | 93 – 101% |
| Residue on ignition (as SO4) | Max 0.01% | Selenate and sulphate | Passes USP test |
| Insoluble matter | 1 gm in 5 ml water gives clear solution |
Safety Information and Hazard Symbols
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Symbol: GHS06, GHS08, GHS09
Signal Word: Danger
UN No.: 3283
IMCO Class No.: 6.1
Packing Group: II
Hazardous Statement: H301-H331-H373-H410
Precaution Statement: P260-P264-P273-P301+P310-P304+P340
Signal Word: Danger
UN No.: 3283
IMCO Class No.: 6.1
Packing Group: II
Hazardous Statement: H301-H331-H373-H410
Precaution Statement: P260-P264-P273-P301+P310-P304+P340
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