Identifiers | |
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3D model (JSmol)
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1969559 | |
ChEBI |
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ChemSpider | |
ECHA InfoCard | 100.130.419 |
EC Number |
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KEGG |
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PubChem CID
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UNII |
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Properties | |
C6H12N2O4Se2 | |
Molar mass | 334.114 g·mol−1 |
Appearance | white solid |
Melting point | 222 °C (432 °F; 495 K) |
Hazards | |
GHS labelling:[1] | |
Danger | |
H301, H331, H373, H410 | |
P260, P261, P264, P270, P271, P273, P301+P316, P304+P340, P316, P319, P321, P330, P391, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Selenocystine is the amino acid with the formula (HO2CCH(NH2)CH2Se)2. It is the oxidized derivative of the canonical amino acid selenocysteine (HO2CCH(NH2)CH2SeH). The compound can also be prepared synthetically from serine.[2] Because selenocysteine is not easily isolated or handled, it is often generated by reduction of selenocystine in situ.[3] The selenium–selenium bond length is 2.321 Å, which is 14% longer than the disulfide bond in cystine at 2.040 Å.[4]