PRODUCT NAME: Bortezomib Impurity B
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	BZM-002
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	NA
Mol. Formula	C28H37BN4O5
Molecular Wt	520.4
IUPAC	N-((S)-1-(((R)-3-methyl-1-((3aR,5S,7R,7aS)-6,6,7a-trimethyltetrahydro-3aH-5,7-methano[1,3,2]dioxaborolo[4,5-b]pyran-2-yl)butyl)amino)-1-oxo-3-phenylpr
Synonyms	N-((S)-1-(((R)-3-Mhyl-1-((3aR,5S,7R,7aS)-6,6,7a-trimethyltetrahydro-5H-5,7-methano[1,3,2]dioxaborolo[4,5-b]pyran-2-yl)butyl)amino)-1-oxo-3-phenylpropan-2-yl)pyrazine-2-carboxamide
Long Term Storage Condition	2-8°C Refrigerator
Handling instruction	Sample COA

Test	Results
Appearance	White Solid
Water content by KF/TGA	Sample COA
% Potency = [100 - (Water content by KF)] X HPLC Purity)] / 100	Sample COA
Identification by HNMR	Sample COA
Identification By IR	Sample COA
Mass (ESI)	Sample COA
Solubility	methanol (MeOH), dimethyl sulfoxide (DMSO)
Purity	NLT 95 %
Analysis Date (Release Date)	Sample COA
Attachments	Sample COA
Other Information	Sample COA
Note: This material can be used as a referance standard and is for research purpose ONLY and not for human consumption