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2897-21-4

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Basic Information
CAS No.: 2897-21-4
Name: SELENO-DL-CYSTINE
Article Data: 24
Molecular Structure:
Molecular Structure of 2897-21-4 (SELENO-DL-CYSTINE)
Formula: C6H12 N2 O4 Se2
Molecular Weight: 334.092
Synonyms: Alanine,3,3'-diselenodi-, DL- (8CI); DL-Alanine, 3,3'-diselenobis-; DL-Selenocystine;Seleno-DL-cystine; Selenocystine
Density: g/cm3
Melting Point: 214.5°C
Boiling Point: 538.3°Cat760mmHg
Flash Point: 279.3°C
Hazard Symbols:
Risk Codes: 23/25-33-50/53
Safety: Poison by subcutaneous and intraperitoneal routes. When heated to decomposition it emits toxic fumes of NOx and Se.
PSA: 126.64000
LogP: -0.62920
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Chemistry

Empirical Formula: C6H12N2O4Se2
Molecular Weight: 334.0905 g/mol
Flash Point: 279.3 °C
Enthalpy of Vaporization: 89.19 kJ/mol
Boiling Point: 538.3 °C at 760 mmHg
Vapour Pressure: 5.12E-13 mmHg at 25 °C
Structure of DL-Selenocystine (CAS NO.2897-21-4):
                        
Product Category of DL-Selenocystine (CAS NO.2897-21-4): Dipeptides;Dipeptides and Tripeptides;Peptides

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 oral 76mg/kg (76mg/kg)   Japanese Journal of Toxicology and Environmental Health. Vol. 39, Pg. 289, 1993.
rat LD50 intraperitoneal 8463ug/kg (8.463mg/kg)   Journal of Pharmacology and Experimental Therapeutics. Vol. 108, Pg. 437, 1953.
rat LDLo subcutaneous 13mg/kg (13mg/kg) SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE Archives of Toxicology. Vol. 45, Pg. 207, 1980.

Safety Profile

Poison by subcutaneous and intraperitoneal routes. When heated to decomposition it emits toxic fumes of NOx and Se.
Hazard Codes of DL-Selenocystine (CAS NO.2897-21-4): ToxicT,DangerousN
Risk Statements: 23/25-33-50/53 
R23/25:Toxic by inhalation and if swallowed. 
R33:Danger of cumulative effects. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 20/21-28-45-60-61 
S20:When using, do not eat or drink. 
S21:When using do not smoke. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.

Standards and Recommendations

OSHA PEL: TWA 0.2 mg(Se)/m3
ACGIH TLV: TWA 0.2 mg(Se)/m3

Specification

Now, DL-Selenocystine , ever using cas register number: 1464-43-3, its cas register number is 2897-21-4. It also can be called Alanine, 3,3'-diselenodi-, DL- ; and Seleno-DL-cystine .