Kaaris Lab

Product Name	N-Nitroso Methotrexate EP Impurity-B	CAT Number	KL-06-00134
CAS Number	NA	Alternate CAS
Molecular Formula	C19H19N9O6	Molecular Weight	469.4
Sample COA	SDS	Status	Synthesis on Demand

API Family	Methotrexate
Product Type	Nitrosamines
IUPAC Name
Synonyms	N-nitroso-aminopterin;
SMILES	NC1=NC(N)=C2C(N=CC(CN(N=O)C3=CC=C(C(N[C@H](C(O)=O)CCC(O)=O)=O)C=C3)=N2)=N1

Storage Temp	2°C ~ 8°C Protected from light and Sealed	Shipping Temp	"All Product are stable to be shipped at room temperature, unless otherwise specified"
Product Format	Neat	Solvent
Purity	> 95%	Stable Isotopes

N-Nitrosomorpholine

1-Amyl-1-nitrosourea

N-Nitroso Aripiprazole EP Impurity B

N-Nitroso-Acebutolol

N-Nitroso-Ambroxol

Aprepitant Nitroso Impurity 4

N-Nitroso Atenolol

N-Nitroso-Atomoxetine

N-Nitroso Azithromycin EP Impurity A

N-Nitroso Azithromycin EP Impurity I

N-Nitroso Apixaban Pentanoic Acid

Acalabrutinib Nitroso Impurity 1

Acalabrutinib Nitroso Impurity 2

Avatrombopag Nitroso Impurity 1

N-Nitroso Almotriptan EP Impurity A

Acarbose Nitroso Impurity 1

Argatroban Nitroso Impurity

N-Nitroso Arotinolol

N-Nitroso-Bisoprolol

N-Nitroso Bisoprolol EP Impurity A

N-Nitroso Bisoprolol EP Impurity G

N-Nitroso Bisoprolol EP Impurity K

N-Nitroso-Betahistine

N-Nitroso Betahistine EP Impurity C

N-Nitroso Buspirone EP Impurity A

1,4-Dinitrosopiperazine

N-Nitroso O-Desmethyl Brinzolamide

Bilastine Nitroso Impurity 2

N-Nitroso Benazepril

Brompheniramine Nitroso Impurity 1

Benzydamine Nitroso Impurity 1

N-Nitroso Bedaquiline Impurity 3

N-Nitroso Blonanserin Impurity 1

N-Nitroso Chlorphenamine EP Impurity C

N-Nitroso Carbamazepine EP Impurity D

N-Nitroso Carbamazepine EP Impurity E

N-Nitroso Clozapine

Clozapine Nitroso EP Impurity C

Clozapine Dinitroso Impurity

Candesartan Nitroso Impurity 2

N-Nitroso Carvedilol

N-Nitroso-Cinacalcet

N-Nitroso Ciprofloxacin

N-Nitroso-N-Desmethyl-Clarithromycin

Di-Nitroso-Clonidine

N-Nitroso Cyclobenzaprine USP Related Compound B

N-Nitroso Desmethyl Chlorpromazine Impurity

Caspofungin Nitroso Impurity

N-Nitroso-Colestipol-3

N-Nitroso-Colestipol-4

N-Nitroso Cinnarizine EP Impurity A

N-Nitroso Clemastine

Duloxetine Nitroso Impurity 1

N-Nitroso Duloxetine EP Impurity B

N-Nitroso Duloxetine

N-Nitroso Duloxetine EP Impurity C

N-Nitroso Duloxetine EP Impurity E

Duloxetine Nitroso Impurity 3

Duloxetine Nitroso Impurity 4

N-Nitroso Donepezil EP Impurity A

Dabigatran Nitroso Impurity 1

N-Nitroso Dabigatran Etexilate

N-Nitroso N-Deshydroxyethyl Dasatinib 1

N-Nitroso Desloratadine

N-Nitroso Diclofenac

N-Nitroso Desmethyl Cis-Doxepin

N-Nitroso Desmethyl (Trans-Doxepin)

N-Nitroso Desmethyl Desvenlafaxine

N-Nitroso-N-Desmethyl Doxycycline

N-Nitroso Diphenhydramine EP Impurity A

N-Nitroso Desethyl Dicycloverine

N-Nitroso Dimenhydrinate EP Impurity F

N-Nitroso Dalbavancin

N-Nitroso dobutamine

N-Nitroso-Desmethyl-Escitalopram

N-Nitroso Escitalopram EP Impurity D

N-Nitroso Erythromycin EP Impurity B

N-Nitroso-Desmethyl Erythromycin Ethyl Succinate

N-Nitroso Enalapril

Epinephrine Nitroso Impuirty

N-Nitroso Edoxaban Impurity 1

N-Nitroso Edoxaban Desmethyl Impurity

N-Nitroso Edoxaban Impurity 4

Enalaprilat Nitroso Impurity

Esmolol Nitroso Impurity

N-Nitroso-Fluoxetine

N-Nitroso Fluoxetine EP Impurity A (Mixture of Isomers)

Fluoxetine Nitroso EP Impurity B

Fluoxetine Nitroso EP Impurity C

N-Nitroso Formoterol

N-Nitroso Fluvoxamine EP Impurity C

N-Nitroso Fluvoxamine EP Impurity F

Flecainide Nitroso Impurity

N-Nitroso-Furosemide

Folinic Acid Nitroso Impurity 2

N-Nitroso Folic acid Impurity 1

N-(1-Nitrosopiperidin-4-yl)-N-phenylpropionamide

N-Nitroso Galantamine EP Impurity E

N-Nitroso Gentamicin-2

N-Nitroso Gentamicin-3

Glycopyrrolate Nitroso Impurity 1

N-Nitroso Hydroxychloroquine EP Impurity D

4-Nitroso Hydrochlorothiazide

Haloperidol Nitroso Impurity 1

N-Nitroso Ibrutinib Impurity 2

N-Nitroso Itraconazole Impurity 2

N-Nitroso Isoproterenol

N-Nitroso-Desmethyl Itopride

N-Nitroso-Desmethyl-Ibandronate

Ketoconazole Nitroso EP Impurity D

N-Nitroso Levetiracetam Impurity 2

N-Desmethyl N-Nitroso Lercanidipine EP Impurity C

N-Nitroso Labetolol

N-Nitroso Levofloxacin EP Impurity B

N-Nitroso-Levofloxacin impurity-2

N-Nitroso N-Desethyl Lidocaine (Mixture of isomers)

Linagliptin Regio Isomer Nitroso Impurity 1

Linagliptin Nitroso Dimer Impurity 1

Linagliptin Nitroso Impurity 10

N-Nitroso Linezolid Descarbonyl (R)-Isomer

Linezolid Descarbonyl N-Desacetyl Nitroso Impurity

Lymecycline Nitroso Impurity

Lofexidine Nitroso Impurity

1-Nitroso-4-phenylpiperazine

N-Nitroso Methotrexate EP Impurity-B

N-Nitroso Methotrexate EP Impurity L

N-Nitroso Metoprolol

N-Nitroso Mirtazapine EP Impurity D

N-Nitroso Moxonidine Impurity 3

N-Nitroso Moxifloxacin

Moxifloxacin Nitroso Impurity 3

N-Nitroso Mirabegron

Mirabegron Nitroso Impurity 1

Mirabegron Nitroso Impurity 2

Mirabegron Nitroso Impurity 12

N-Nitroso N-Desmethyl Mifepristone

N-Nitrosodimethylamine

N-Nitrosodiethylamine

N-Nitrosodiethylamine-D10

N-Nitrosopiperidine

N-Nitrosodi-n-butylamine

N-Nitrosopyrrolidine

N-Nitrosodipropylamine

N-Nitroso-N-methylphenylamine

N-NitrosoMethylEthyl Amine (Mixture of Isomers)

N-Methyl-N’-Nitrosopiperazine

1-Nitrosopiperazine

N-Nitroso Metamizole EP Impurity E

N-Nitroso Metamizole EP Impurity C

N-Nitroso Meropenem

Mebeverine Nitroso Impurity 1

Mebeverine Nitroso Impurity 2

N-Nitroso Mebeverine EP Impurity B

Melatonin Nitroso Impurity 1

N-Nitroso n-Butyl-D-Glucamine

N-Nitroso N-Desmethyl Nicardipine

Norfloxacin (N-Nitrosonorfloxacin)

N-Nitroso-Nebivolol

N-Nitroso-N-Desmethylnintedanib

N-Nitroso (±)-Epinephrine

N-Nitroso Epinephrine Impuirty 2

N-Nitroso Nortriptyline

"N,N-Dinitroso-Ethylene Diaminodiacetic Acid"

N-Nitroso-N-Methyl-O-Methyl-Hydroxylamine

N-Nitrosodiisobutylamine

1-Nitrosopiperidin-3-amine

N-Methyl-N-nitrosoglycine

1-Nitroso-1H-Indole

Methyl N-Methyl-N-Nitrosoanthranilate

N-2-Methylpropyl-N-nitroso-Urea

N-Amyl-N-nitrosourethane

N-Nitrosodipropylamine-d14

N-Nitroso Naltrexone EP Impurity B

N-Nitroso N-Desmethyl Olanzapine Impurity 1

N-Nitroso Desmethyl Orphenadrine

N-Nitroso-Pramipexole

N-Nitroso Propranolol

N-Nitroso Paliperidone USP Related Compound B

Paliperidone Nitroso Impurity 2

N-Nitroso paroxetine Impurity

N-Nitroso Benzylpenicillin EP Impurity E

N-Nitroso Perindopril

Posaconazole Nitroso Impurity 3

N-Nitroso Prazosin EP Impurity C

1-Nitrosopiperidine-4-Carboxylic Acid

Plerixafor Nitroso Impurity 2

Nitroso Derivative Impurity of Desmethyl Ponatinib

N-Nitroso Quetiapine Impurity

Quetiapine Nitroso EP Impurity B

N-Nitroso Ropinirole EP Impurity D

N-Nitroso Desmethyl Rizatriptan

N-Nitroso Ramipril

Riociguat N-Nitroso Des Formyl Impurity

Riociguat Nitroso USP Related Compound C

N-Nitroso Risperidone Impurity 1

N-Nitroso Risperidone Impurity 2

Rivaroxaban Nitroso Impurity 1

Rivaroxaban Nitroso Impurity 2

Rivaroxaban Nitroso Impurity 4

Rivaroxaban Nitroso Impurity 5

Rivaroxaban Nitroso Impurity 9

Rivaroxaban Nitroso Impurity 11

N-Nitroso Rivaroxaban Open-Ring Acid Impurity

Rivaroxaban N-Nitroso Amide Impurity

N-Nitroso Rivastigmine Hydrogen Tartrate EP Impurity E

N-Nitroso Rosuvastatin

Rilpivirine Nitroso Impurity

N-Nitroso-Rasagiline

Ribociclib Nitroso Impurity 1

Rimegepant Nitroso Impurity 5

N-Nitroso Risdiplam

Sertraline Nitroso Impurity

N-Nitroso Sertraline EP Impurity C

N-Nitroso N-Desmethyl Sildenafil

N-Nitroso Silodosin Nitrile Impurity

N-Nitroso Sitagliptin Impurity

Solifenacin Nitroso Impurity 1

N-Nitroso Sumatriptan EP Impurity B

N-Nitroso-Sotalol

N-Nitroso Sotalol EP Impurity A

Selexipag Nitroso Impurity 4

Tadalafil Nitroso Impurity 1

N-Nitroso Tadalafil Chloroacetyl Impurity

N-Nitroso Tamsulosin Impurity

N-Nitroso Tofacitinib Impurity

N-Nitroso Terazosin EP Impurity N

Tizanidine Nitroso Impurity 1

Tetracaine Nitroso Impurity 1

N-Nitroso Trimetazidine

N-Nitroso Tamoxifen EP Impurity F

N-Nitroso Terbinafine EP Impurity A

N-Nitroso N-Desmethyl Terbinafine

N-Nitroso Tigecycline

Trandolapril Nitroso Impurity 1

Tulobuterol Nitroso Impurity

N-Nitroso Temocapril

N-Nitroso Temocaprilat

N-Nitroso Ulipristal Acetate

N-Nitroso N-Desmethyl Ulipristal

N-Nitroso-N-methyl-4-aminobutyric acid

N-Nitrosoethylisopropylamine

N-Nitrosodiisopropylamine

N-Nitroso Valsartan Impurity 1

N-Nitroso Valsartan Cyano Desvaleryl Methyl Ester

N-Nitroso Valaciclovir EP Impurity D

N-Nitroso Valaciclovir EP Impurity C

Vancomycin Nitroso Impurity

N-Nitroso Venlafaxine EP Impurity D

Vildagliptin Nitroso Impurity 1

N-Nitroso Vildagliptin Impurity

N-Nitroso Vildagliptin Carboxylic Acid Impurity

N-Nitroso-L-proline

Vildagliptin Nitroso Impurity 4

N-Nitroso Varenicline

N-Nitroso Vortioxetine

N-Nitroso Vortioxetine Bromo Impurity

N-Nitroso Vortioxetine Impurity 1

N-Nitroso Vortioxetine Impurity 3

N-Nitroso Verapamil EP Impurity B

N-Nitroso Verapamil EP Impurity F

N-Nitroso Verapamil EP Impurity J

Venetoclax Nitroso Impurity 5

Vonoprazan Nitroso Impurity

Vonoprazan Nitroso Impurity 1

N-Nitroso Viloxazine Impurity 1

N-Nitroso Viloxazine

N-Nitroso Zolmitriptan

N-Nitroso Zolmitriptan EP Impurity G

N-Nitroso Benzathine

N-Nitrosodiphenylamine

N-Nitroso meglumine

N-Nitrosodiethanolamine

N-Nitrosodibenzylamine

N-Nitroso Cyclophosphamide EP impurity C

N-Nitroso Pefloxacin EP Impurity A

N-Nitroso Donepezil EP Impurity A

N-Nitroso Ibrutinib N-Desacryloyl Impurity

N-Nitroso Cetirizine EP Impurity A

N-Nitroso Brexpiprazole Impurity 22

N-Nitroso Terbinafine EP Impurity A (Mixture of Isomers)

N-Nitrosodimethylamine 1mg/1ml in Methanol

N-Nitrosodiethylamine 1mg/1ml in Methanol

Nifedipine EP Impurity B

Nisoldipine Impurity 3 (Dehydronitrosonisoldipine)

N-Nitroso-L-Hydroxyproline

Nitroso-prodenafil

N-Nitroso Hydroxychloroquine

Linagliptin Nitroso Impurity 5

N-Nitroso 3-Pyrrolidinol

N-Nitroso Brexpiprazole Impurity 1

Metopimazine Nitroso Impurity 1

N-Nitroso Tropicamide EP Impurity A

N-Nitroso Delamanid Piperidine Impurity

N-Nitroso Risperidone Difluorobenzoyl Impurity

N-Nitroso Ivabradine Amine Hydrochloride impurity

N-Nitroso Venetoclax Impurity 38

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