Skip to Content
Merck
CN

PHR8663

Methotrexate Related Compound B

certified reference material, pharmaceutical secondary standard

Synonym(s):

Aminopterin, (S)-2-{4-[(2,4-Diaminopteridin-6-yl)methylamino]benzamido}pentanedioic acid, 4-Amino-PGA, 4-Aminofolic acid, 4-Aminopteroyl-L-glutamic acid

Sign In to View Organizational & Contract Pricing.

Select a Size

About This Item

Empirical Formula (Hill Notation):
C19H20N8O5
CAS Number:
54-62-6
Molecular Weight:
440.41
NACRES:
NA.24
Beilstein/REAXYS Number:
69045

Key Documents

View All Documentation
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

Product Name

Methotrexate Related Compound B, certified reference material, pharmaceutical secondary standard

InChI key

TVZGACDUOSZQKY-LBPRGKRZSA-N

InChI

1S/C19H20N8O5/c20-15-14-16(27-19(21)26-15)23-8-11(24-14)7-22-10-3-1-9(2-4-10)17(30)25-12(18(31)32)5-6-13(28)29/h1-4,8,12,22H,5-7H2,(H,25,30)(H,28,29)(H,31,32)(H4,20,21,23,26,27)/t12-/m0/s1

SMILES string

Nc1nc(N)c2nc(CNc3ccc(cc3)C(=O)N[C@@H](CCC(O)=O)C(O)=O)cnc2n1

grade

certified reference material
pharmaceutical secondary standard

agency

traceable to USP (Referencew Standard (1414025))

CofA

current certificate can be downloaded

packaging

pkg of 100 mg

ε (extinction coefficient)

24,500 at 282 nm in 0.1 M NaOH at 1 M
25,700 at 261 nm in 0.1 M NaOH at 1 M
8,100 at 373 nm in 0.1 M NaOH at 1 M

application(s)

pharmaceutical

storage temp.

-10 to -25°C

Quality Level

300

Related Categories

Analysis Note

These secondary standards offer multi-traceability to the USP, EP and BP primary standards, where they are available.

Biochem/physiol Actions

Folic acid antagonist that binds to dihydrofolate reductase and inhibits its activity.
Folic acid antagonist. Aminopterin is actively transported into cells by the folate transporter. In the cell, it is converted to a high molecular weight polyglutamate metabolite by folylpolyglutamate synthase that, in turn, binds to dihydrofolate reductase and inhibits its activity. Aminopterin-polyglutamate is degraded intracellularly by γ-glutamyl hydrolase.

General description

Pharmaceutical secondary standards for application in quality control provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.

Other Notes

More potent, but more toxic, than methotrexate.
This Certified Reference Material (CRM) is produced and certified in accordance with ISO 17034 and ISO/IEC 17025. All information regarding the use of this CRM can be found on the certificate of analysis.

Regulatory Information

新产品
This item has

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service