Tetrahydrobiopterin with CAS 17528-72-2

what is of  Tetrahydrobiopterin with CAS 17528-72-2? 

Tetrahydrobiopterin is a cofactor of aromatic amino acid hydroxylase and an essential cofactor of nitric oxide synthase (NOS).

Specification

Item	Standard	Test Results
Identification	A.H-NMR:Comply with the structure	Complies
	B.LC-MS:Comply with the structure	Complies
	C.The IR spectrum of sample should be identical with that of reference standard.	Complies
	D.HPLC-ESI-MS The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay.	Complies
Loss on drying	≤2.0%	0.19%
Heavy metals	≤10 ppm	<10ppm
Water	≤1.0%	0.1%
Sulphated ash	≤0.5% determined on 1.0 g.	0.009%
Residue on ignition	≤0.1%	0.03%
Related Substances	Unspecified impurities: for each impurity ≤0.10%	<0.10%
	Total Impurity ≤0.5%	0.18%

Application

Packing

Usually packed in 25kg/drum,and also can be do customized package.