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Specifications

Catalog #	H7000
Solubility (10mg/ml, 2N NH4)	Colorless, clear, complete
Specific Rotation ( )D24, 1% HCl)	+74° to +76°
	Enantiomer Content
Identity (TLC)	methanol/chloroform/ammonia 17%: 2/2/1 (v/v/v)
	isopropanol/ammonia conc. 1/1 (v/v)
	n-butanol/acetic acid/H2O 4/2/3 (v/v/v)
	detected by UV, ninhydrin, chlorine-tolidine
	plate: silicagel 60 F254
Contaminant	99% L-homo-Cystine
	0.2% D-enantiomer
	0.2%meso-homo-Cystine
Water Content (KF)	~0.1%
Elemental Analysis	99.8% (Nth 10.44%, Nfd 10.42%)
Storage and Stability	May be stored at 4°C. Stable for 6 months. Moisture sensitive.
CAS Number	626-72-2
Molecular Formula	C8H16N2O4S2
Molecular Weight	268.3
Purity	~90% (TLC)
Form	Supplied as a white powder.
Important Note	This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Alternate names	H-Homocystine-(OH)2; L-4-4?-Dithiobis(2-aminobutanoic acid)