PRODUCT NAME: Roflumilast Impurity 28
Date of Mfg: Sample COA	RETEST DATE: Sample COA

Catalogue Number	ROF-010
Item/Batch Number	Sample COA
Quantity	Sample COA
CAS Number	151103-08-1
Mol. Formula	C8H6F2O3
Molecular Wt	188.13
IUPAC	4-(Difluoromethoxy)-3-hydroxybenzaldehyde
Synonyms	Benzaldehyde, 4-(difluoromethoxy)-3-hydroxy; 4-(Difluoromethoxy)-3-hydroxybenzaldehyde;Roflumilast KSM-I
Long Term Storage Condition	Inert atmosphere, 2-8°C
Handling instruction	Sample COA

Test	Results
Appearance	Off 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 and chloroform
Purity	min. 98.0 %
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