D-Tryptophan; D-Valine; D-Leucine; D-Serine

D-Tryptophan
Product Name: D-TryptophanSynonyms: (R)-2-amino-3-(3-indolyl)propionic acidMolecular Formula: C11H12N2O2D-Tryptophan CAS #: 153-94-6
Test Items Standard
D-Tryptophan appearance almost white powder
Specific Rotation [a]20/D +30.0 to +33.0 Degree (C=1 in H2O)
Assay 98.0 to 101.0%
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 (Sulfate) Not more than 0.20%

D-Valine
Product Name: D-ValineSynonyms: (R)-a-aminoisovaleric acidMolecular Formula: C5H11NO2CAS #: 640-68-6
Test Items Standard
Appearance White powder
Assay 98.0% to 101.0%
Specific Rotation [a]20/D -27.6 to -29.0 Degree (C=8 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%

D-Leucine
Product Name: D-Leucine
Synonyms: (R)-2-amino-4-methylpentanoic acid
Molecular Formula: C6H13NO2
CAS #: 328-38-1
Test Items Standard
Appearance White powder
Assay 99.0% to 100.5%
Specific Rotation [a]20/D -14.9 to -16.0 Degree (C=4 in 6N HCl)
Chloride (Cl) Not more than 0.020%
Heavy Metals (Pb) Not more than 10 PPM
Test Items Standard
Residue on ignition Not more than 0.10%

D-Serine
Product Name: D-Serine
Synonyms: Beta-Hydroxyalanine
Molecular Formula: C3H7NO3
CAS #: 312-84-5
Test Items: Standard
Appearance: White crystalline powder
Specific Rotation: [a]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%.