PRODUCT NAME: Allopurinol N-Nitroso Impurity 1
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	NIT-091
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	NA
Mol. Formula	C5H3N5O2
Molecular Wt	165.1 g/mol
IUPAC	1-Nitroso-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
Synonyms	1-Nitroso-1,7-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one; 1-nitroso-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one
Long Term Storage Condition	2-8°C Refrigerator
Handling instruction	Sample COA

Test	Results
Appearance	yellow to orange-yellow crystalline or powdery 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
Purity	NLT 98%
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