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Pharmaceutical Reference Standards / Impurity Standards

Methotrexate Hydrate

Methotrexate Hydrate

CAT. No.M160000
CAS. No.133073-73-1
Mol. F.C20H22N8O5H2O
Mol. W.454.44 g/mol
Stock Status:Instock

Methotrexate Disodium Salt

Methotrexate Disodium Salt

CAT. No.M160000A
CAS. No.7413-34-5
Mol. F.C20H20N8Na2O5
Mol. W.498.40 g/mol
Stock Status:Instock

Methotrexate base

Methotrexate base

CAT. No.M160000B
CAS. No.59-05-2
Mol. F.C20H22N8O5
Mol. W.454.44 g/mol
Stock Status:Instock

Methotrexate Form 1

Methotrexate Form 1

CAT. No.M160000D
CAS. No.59-05-2
Mol. F.C20H22N8O5
Mol. W.454.43 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity C

Methotrexate EP Impurity C

CAT. No.M160001
CAS. No.2410-93-7
Mol. F.C20H21N7O6
Mol. W.455.44 g/mol
Stock Status:Instock

Methotrexate EP Impurity J

Methotrexate EP Impurity J

CAT. No.M160002
CAS. No.34378-65-9
Mol. F.C22H26N8O5
Mol. W.482.49 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity B Hydrate

Methotrexate Impurity B Hydrate

CAT. No.M160003
CAS. No.54-62-6(free base)
Mol. F.C19H20N8O5.XH2O
Mol. W.NA
Stock Status:Instock

Methotrexate EP Impurity E

Methotrexate EP Impurity E

CAT. No.M160004
CAS. No.19741-14-1
Mol. F.C15H15N7O2
Mol. W.325.33 g/mol
Stock Status:Under Synthesis

Methotrexate EP Impurity D

Methotrexate EP Impurity D

CAT. No.M160008
CAS. No.5623-18-7
Mol. F.C15H14N6O3
Mol. W.326.31 g/mol
Stock Status:Instock

(2,4-diaminopteridin-6-yl)methanol Hydrochloride

(2,4-diaminopteridin-6-yl)methanol Hydrochloride

CAT. No.M160009
CAS. No.73978-41-3
Mol. F.C7H8N6O.HCl
Mol. W.228.64 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity A

Methotrexate EP Impurity A

CAT. No.M160009A
CAS. No.945-24-4
Mol. F.C7H8N6O
Mol. W.192.18 g/mol
Stock Status:Custom Synthesis

2,4-Diamino-6-(hydroxymethyl)pteridine Hydrochloride

2,4-Diamino-6-(hydroxymethyl)pteridine Hydrochloride

CAT. No.M160009B
CAS. No.73978-41-3
Mol. F.C7H9ClN6O
Mol. W.228.64 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity E

Methotrexate EP Impurity E

CAT. No.M160010
CAS. No.70844-48-3
Mol. F.C30H30N14O4.HCl
Mol. W.687.11 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity F

Methotrexate EP Impurity F

CAT. No.M160011
CAS. No.51865-79-3
Mol. F.C20H22N8O5
Mol. W.454.44 g/mol
Stock Status:Instock

N-(4-N-Methylaminobenzoyl)-L-glutamic acid diethyl ester

N-(4-N-Methylaminobenzoyl)-L-glutamic acid diethyl ester

CAT. No.M160012
CAS. No.2378-95-2
Mol. F.C17H24N2O5
Mol. W.336.4 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 9

Methotrexate Impurity 9

CAT. No.M160013
CAS. No.10541-83-0
Mol. F.C8H9NO2
Mol. W.151.16 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity I

Methotrexate EP Impurity I

CAT. No.M160014
CAS. No.66147-29-3
Mol. F.C21H24N8O5
Mol. W.468.47 g/mol
Stock Status:Instock

Methotrexate EP Impurity H

Methotrexate EP Impurity H

CAT. No.M160015
CAS. No.67022-39-3
Mol. F.C21H24N8O5
Mol. W.468.47 g/mol
Stock Status:Custom Synthesis

Methotrexate Dimethylamide

Methotrexate Dimethylamide

CAT. No.M160016
CAS. No.71074-44-7
Mol. F.C22H27N9O4
Mol. W.481.51 g/mol
Stock Status:Custom Synthesis

4-Aminodeoxopteroic Acid

4-Aminodeoxopteroic Acid

CAT. No.M160017
CAS. No.36093-85-3
Mol. F.C14H13N7O2
Mol. W.311.3 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity G

Methotrexate EP Impurity G

CAT. No.M160018
CAS. No.NA
Mol. F.C28H29N9O6
Mol. W.587.59 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity L Disodium Salt

Methotrexate EP Impurity L Disodium Salt

CAT. No.M160019
CAS. No.NA
Mol. F.C13H14N2Na2O5
Mol. W.324.24 g/mol
Stock Status:Custom Synthesis

2-amino-6-(chloromethyl) pteridin-4(1H)-one

2-amino-6-(chloromethyl) pteridin-4(1H)-one

CAT. No.M160020
CAS. No.873397-19-4
Mol. F.C7H6ClN5O
Mol. W.211.61 g/mol
Stock Status:Custom Synthesis

Folic Acid Impurity 24

Folic Acid Impurity 24

CAT. No.M160021
CAS. No.712-29-8
Mol. F.C7H7N5O2
Mol. W.193.16 g/mol
Stock Status:Custom Synthesis

Dimethyl Glutamate

Dimethyl Glutamate

CAT. No.M160022
CAS. No.6525-53-7
Mol. F.C7H13NO4
Mol. W.175.18 g/mol
Stock Status:Custom Synthesis

(R)-Dimethyl 2-aminopentanedioate

(R)-Dimethyl 2-aminopentanedioate

CAT. No.M160023
CAS. No.16422-27-8
Mol. F.C7H13NO4
Mol. W.175.2 g/mol
Stock Status:Custom Synthesis

D-glutamic Acid Diethyl Ester

D-glutamic Acid Diethyl Ester

CAT. No.M160024
CAS. No.13107-55-6
Mol. F.C9H17NO4
Mol. W.203.24 g/mol
Stock Status:Custom Synthesis

(4S)-4-amino-5-(dimethylamino)-5-oxopentanoic acid

(4S)-4-amino-5-(dimethylamino)-5-oxopentanoic acid

CAT. No.M160025
CAS. No.87733-70-8
Mol. F.C7H14N2O3
Mol. W.174.21 g/mol
Stock Status:Custom Synthesis

Methotrexate 7-Hydroxy

Methotrexate 7-Hydroxy

CAT. No.M160026
CAS. No.5939-37-7
Mol. F.C20H22N8O6
Mol. W.470.44 g/mol
Stock Status:Custom Synthesis

2,4-Diaminopteridine

2,4-Diaminopteridine

CAT. No.M160028
CAS. No.1127-93-1
Mol. F.C6H6N6
Mol. W.162.15 g/mol
Stock Status:Instock

2,4-Diamino-6-methylpteridine

2,4-Diamino-6-methylpteridine

CAT. No.M160029
CAS. No.708-74-7
Mol. F.C7H8N6
Mol. W.176.18 g/mol
Stock Status:Instock

N-(4-chlorobenzoyl)-L-glutamic Acid

N-(4-chlorobenzoyl)-L-glutamic Acid

CAT. No.M160030
CAS. No.57444-70-9
Mol. F.C12H12ClNO5
Mol. W.285.7 g/mol
Stock Status:Custom Synthesis

Diethyl 2-(4-aminobenzamido)pentanedioate

Diethyl 2-(4-aminobenzamido)pentanedioate

CAT. No.M160031
CAS. No.NA
Mol. F.C16H22N2O5
Mol. W.322.36g/mol
Stock Status:Custom Synthesis

Diethyl(2S)-2-((4-(ethylamino)benzoyl)amino)pentanedioate

Diethyl(2S)-2-((4-(ethylamino)benzoyl)amino)pentanedioate

CAT. No.M160032
CAS. No.NA
Mol. F.C18H26N2O5
Mol. W.350.41 g/mol
Stock Status:Custom Synthesis

Diethyl(2S)-2-((2-(methylamino)benzoyl)amino)pentanedioate

Diethyl(2S)-2-((2-(methylamino)benzoyl)amino)pentanedioate

CAT. No.M160033
CAS. No.NA
Mol. F.C17H24N2O5
Mol. W.336.38 g/mol
Stock Status:Custom Synthesis

Diethyl(2S)-2-((3-(methylamino)benzoyl)amino)pentanedioate

Diethyl(2S)-2-((3-(methylamino)benzoyl)amino)pentanedioate

CAT. No.M160034
CAS. No.NA
Mol. F.C17H24N2O5
Mol. W.336.38 g/mol
Stock Status:Custom Synthesis

2,4-diamino-7-methylpteridine hemi hydrochloride

2,4-diamino-7-methylpteridine hemi hydrochloride

CAT. No.M160036
CAS. No.NA
Mol. F.C7H8N6.1/2(HCl)
Mol. W.194.41 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity L

Methotrexate EP Impurity L

CAT. No.M160038
CAS. No.52980-68-4
Mol. F.C13H16N2O5
Mol. W.280.28 g/mol
Stock Status:Custom Synthesis

N-Nitroso Methotrexate

N-Nitroso Methotrexate

CAT. No.M160039
CAS. No.NA
Mol. F.C13H15N3O6
Mol. W.309.27 g/mol
Stock Status:Custom Synthesis

Methotrexate Dimethylester Hydrochloride

Methotrexate Dimethylester Hydrochloride

CAT. No.M160040
CAS. No.NA
Mol. F.C22H27ClN8O5
Mol. W.518.95 g/mol
Stock Status:Custom Synthesis

N-Nitroso Methotrexate EP Impurity-B

N-Nitroso Methotrexate EP Impurity-B

CAT. No.M160041
CAS. No.NA
Mol. F.C19H19N9O6
Mol. W.469.41 g/mol
Stock Status:Custom Synthesis

N-Nitroso Methotrexate EP Impurity L

N-Nitroso Methotrexate EP Impurity L

CAT. No.M160042
CAS. No.NA
Mol. F.C13H15N3O6
Mol. W.309.27 g/mol
Stock Status:Custom Synthesis

N-(4-(methyl(nitroso)amino)benzoyl)-N-nitroso-L-glutamic acid

N-(4-(methyl(nitroso)amino)benzoyl)-N-nitroso-L-glutamic acid

CAT. No.M160043
CAS. No.NA
Mol. F.C13H14N4O7
Mol. W.338.27 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 4

Methotrexate Impurity 4

CAT. No.M160044
CAS. No.52030-86-1
Mol. F.C13H16N2O5
Mol. W.280.28 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 11

Methotrexate Impurity 11

CAT. No.M160045
CAS. No.34794-87-1
Mol. F.C15H14N6O3
Mol. W.326.31 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 12

Methotrexate Impurity 12

CAT. No.M160046
CAS. No.881-33-4
Mol. F.C7H8N6O
Mol. W.192.18 g/mol
Stock Status:Custom Synthesis

N-Nitroso S-Methylaminobenzoyl Glutamicester

N-Nitroso S-Methylaminobenzoyl Glutamicester

CAT. No.M160047
CAS. No.NA
Mol. F.C17H23N3O6
Mol. W.365.38 g/mol
Stock Status:Custom Synthesis

(R)-diethyl-2-(4-(methyl(nitroso)amino)benzamido)pentanedioate

(R)-diethyl-2-(4-(methyl(nitroso)amino)benzamido)pentanedioate

CAT. No.M160048
CAS. No.NA
Mol. F.C17H23N3O6
Mol. W.365.38 g/mol
Stock Status:Custom Synthesis

(S)-2-(4-(N-((2,4-diaminopteridin-6-yl)methyl)formamido)benzamido)pentanedioic acid

(S)-2-(4-(N-((2,4-diaminopteridin-6-yl)methyl)formamido)benzamido)pentanedioic acid

CAT. No.M160049
CAS. No.NA
Mol. F.C20H20N8O6
Mol. W.468.42 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 13

Methotrexate Impurity 13

CAT. No.M160050
CAS. No.NA
Mol. F.C15H20N2O5
Mol. W.308.33 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 14

Methotrexate Impurity 14

CAT. No.M160051
CAS. No.NA
Mol. F.C15H20N2O5
Mol. W.308.33 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 15

Methotrexate Impurity 15

CAT. No.M160052
CAS. No.NA
Mol. F.C22H26N8O5
Mol. W.482.49 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 16

Methotrexate Impurity 16

CAT. No.M160053
CAS. No.65148-63-2
Mol. F.C22H26N8O5
Mol. W.482.49 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity B Disodium Salt

Methotrexate Impurity B Disodium Salt

CAT. No.M160054
CAS. No.NA
Mol. F.C19H18N8Na2O5
Mol. W.484.38 g/mol
Stock Status:Custom Synthesis

N-Nitroso Methotrexate

N-Nitroso Methotrexate

CAT. No.M160055
CAS. No.NA
Mol. F.C20H21N9O6
Mol. W.483.44 g/mol
Stock Status:Custom Synthesis

4-Aminobenzoyl D-Glutamic Acid

4-Aminobenzoyl D-Glutamic Acid

CAT. No.M160056
CAS. No.5959-18-2
Mol. F.C12H14N2O5
Mol. W.266.25 g/mol
Stock Status:Custom Synthesis

Methotrexate Impurity 6

Methotrexate Impurity 6

CAT. No.M160057
CAS. No.NA
Mol. F.C8H10N6O2
Mol. W.222.20 g/mol
Stock Status:Custom Synthesis

N-Nitroso Methotrexate EP Impurity B D6

N-Nitroso Methotrexate EP Impurity B D6

CAT. No.M160058
CAS. No.NA
Mol. F.C19H13D6N9O6
Mol. W.475.45 g/mol
Stock Status:Custom Synthesis

(S)-1-ethyl 5-methyl 2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

(S)-1-ethyl 5-methyl 2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

CAT. No.M160059
CAS. No.NA
Mol. F.C23H28N8O5
Mol. W.496.52 g/mol
Stock Status:Custom Synthesis

(S)-5-ethyl 1-methyl2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

(S)-5-ethyl 1-methyl2-(4-(((2,4-diaminopteridin-6-yl)methyl)(methyl)amino)benzamido)pentanedioate

CAT. No.M160060
CAS. No.NA
Mol. F.C23H28N8O5
Mol. W.496.52 g/mol
Stock Status:Custom Synthesis

Methotrexate Diethyl Ester

Methotrexate Diethyl Ester

CAT. No.M160061
CAS. No.43170-88-3
Mol. F.C24H30N8O5
Mol. W.510.55 g/mol
Stock Status:Custom Synthesis

Methotrexate Hydrate EP Impurity B

Methotrexate Hydrate EP Impurity B

CAT. No.M160062
CAS. No.1217459-90-9
Mol. F.C19H22N8O6
Mol. W.458.43 g/mol
Stock Status:Custom Synthesis

Methotrexate EP Impurity B

Methotrexate EP Impurity B

CAT. No.M160063
CAS. No.54-62-6
Mol. F.C19H20N8O5
Mol. W.440.41 g/mol
Stock Status:Custom Synthesis

Isotope Labelled Compounds

Methotrexate-D3

Methotrexate-D3

CAT. No.M160005
CAS. No.432545-63-6
Mol. F.C20H19D3N8O5
Mol. W.457.46 g/mol
Stock Status:Instock

Methotrexate -13C,D3

Methotrexate -13C,D3

CAT. No.M160037
CAS. No.NA
Mol. F.C1913CH19D3N8O5
Mol. W.458.45 g/mol
Stock Status:Custom Synthesis