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1.D-Threonine
Product Name: D-Threonine
Synonyms:(2R,3S)-2-Amino-3-hydroxybutyric acid
Molecular Formula:C4H9NO3
CAS #:632-20-2
 
Test Items Standard   
Appearance  White to off-white powder   
Assay  98.0% to 101.0%   
Specific Rotation [α]20/D +27.6 to +29.0 Degree (C=6 in H2O)   
Chloride (Cl)  Not more than 0.10%   
Heavy Metals (Pb)  Not more than 10 PPM    
Loss on Drying  Not more than 0.20%   
Residue on Ignition (Sulfated) Not more than 0.20%  

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2. D-Serine
Product Name:D-Serine
Synonyms:β-Hydroxyalanine
Molecular Formula:C3H7NO3
CAS #:312-84-5
 
Test Items Standard   
Appearance  White crystalline powder   
Specific Rotation [α]20/D +14.4 to +15.5 Degree (C=10 in 2N HCl)   
Assay  98.5% to 101.0%   
Chloride (Cl)  Not more than 0.020%   
Heavy Metals (Pb)  Not more than 10 PPM    
Loss on Drying  Not more than 0.20%   
Residue on ignition  Not more than 0.10% 

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3. D-Histidine
Product Name:D-Histidine
Synonyms:H-D-His-OH
Molecular Formula:C6H9N3O2
CAS #:351-50-8
 
Test Items Standard   
Appearance White powder   
Assay  98.0% to 101.0%   
Specific Rotation [α]20/D -11.8 to -12.8 Degree (C=11 in 6N HCl)   
Chloride (Cl)  Not more than 0.10%   
Heavy Metals (Pb)  Not more than 10 PPM    
Loss on Drying  Not more than 0.20%   
Residue on Ignition (Sulfated) Not more than 0.20% 

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