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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for N-nitroso, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our N-nitroso impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our N-nitroso-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

N-nitroso Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(R)-N-Nitroso Anabasine-d4 Stable Isotopes CS-T-104127 Not Available Enquire
(R,S)-N-Nitroso Anabasine D4 Stable Isotopes CS-T-59611 1020719-68-9 Enquire
(R,S)-N-Nitroso Anatabine-13C6 Stable Isotopes CS-T-98763 Not Available Enquire
(R,S)-N-Nitroso Anatabine-2,4,5,6-d4 Stable Isotopes CS-T-59614 1020719-69-0 Enquire
(S)-N-Nitroso Anabasine-d4 Stable Isotopes CS-T-104126 Not Available Enquire
(S)-N-Nitroso Anatabine D4 Stable Isotopes CS-T-59613 1426174-82-4 Enquire
(S)-N-Nitroso Rivaroxaban Phthalimido Analog-d4 Stable Isotopes CS-O-52466 Not Available In Stock
15N-Nitroso Terbutaline Stable Isotopes CS-EO-02972 Not Available Enquire
D2-N-Nitroso desmethyldoxycycline Stable Isotopes CS-O-44213 Not Available Enquire
Descyclopropyl N-Nitroso Olaparib (Piperzine-d8) Stable Isotopes CS-O-53088 2742659-74-9 (Unlabelled) In Stock
Desmethyl 2N-Nitroso Mirtazapine-d6 Stable Isotopes CS-O-42867 Not Available In Stock
Mixture of  (R,S)-N-Nitroso Anabasine-d4, rac N’-Nitrosonorn... Stable Isotopes CS-T-98765 Not Available Enquire
N-(Methyl-d3)-N-nitrosourea-13C Stable Isotopes CS-O-52485 2483824-34-4 Enquire
N-Desmethyl N-Nitroso Dalbavancin B0-D3 Stable Isotopes CS-O-58870 Not Available Enquire
N-desmethyl N-nitroso Diltiazem-D3 Stable Isotopes CS-O-52036 Not Available Enquire
N-Desmethyl N-Nitroso Galantamine-D3 Stable Isotopes CS-O-55151 Not Available Enquire
N-Desmethyl N-Nitroso Galantamine-d4 Stable Isotopes CS-O-55238 Not Available Enquire
N-Desmethyl N-Nitroso Rifampicin-D8 Stable Isotopes CS-O-45507 Not Available Enquire
N-Desmethyl N-Nitroso Tamoxifen-d3 Stable Isotopes CS-O-44821 Not Available In Stock
N-desmethyl N-Nitroso Topotecan-D3 Stable Isotopes CS-O-45827 Not Available Enquire
N-Desmethyl N-nitroso Tramadol-d3 Stable Isotopes CS-O-54795 Not Available Enquire
N-desmethyl-N-Nitroso DMAMP-d2 Stable Isotopes CS-O-59153 27646-81-7(Unlabeled) Enquire
N-desmethyl-N-Nitroso DMAMP-d3 Stable Isotopes CS-O-59154 27646-81-7(Unlabeled) Enquire
N-desmethyl-N-Nitroso DMAMP-d6 Stable Isotopes CS-O-59152 27646-81-7(Unlabeled) Enquire
N-Ethyl-N-Nitroso-1-Propanamine-d4 Stable Isotopes CS-T-93510 25413-61-0(Unlabelled) In Stock
N-Methyl-d3-N-Nitroso-p-Toluenesulfonamide Stable Isotopes CS-T-94154 42366-72-3 In Stock
N-Methyl-N-Nitrosopiperazine-d4 Stable Isotopes CS-T-81300 756524-88-6 In Stock
N-Methyl-N-Nitrosopiperazine-d4 1mg/1ml in Methanol Stable Isotopes CS-O-43183 756524-88-6 In Stock
N-Nitroso Adrenalone-D3 Stable Isotopes CS-O-52055 Not Available Enquire
N-Nitroso Ambroxol-15N Stable Isotopes CS-O-41442 Not Available Enquire
N-Nitroso Amlodipine D4 Stable Isotopes CS-O-52005 Not Available discontinued
N-Nitroso Amodiaquine-D10 Stable Isotopes CS-T-104136 Not Available Enquire
N-Nitroso Atenolol-d7 Stable Isotopes CS-O-45442 Not Available In Stock
N-Nitroso Avatrombopag imp-d8 (1-cyclohexyl-4-nitrosopiperaz... Stable Isotopes CS-O-58885 Not Available Enquire
N-Nitroso Azithromycin EP impurity A-13CD3 Stable Isotopes CS-O-53432 Not Available Enquire
N-Nitroso Azithromycin EP impurity A-15N-d3 Stable Isotopes CS-O-55556 Not Available Enquire
N-Nitroso Azithromycin EP impurity A-d3 Stable Isotopes CS-O-53431 Not Available Enquire
N-Nitroso Benazepril D5 Stable Isotopes CS-O-43274 Not Available Enquire
N-Nitroso Benzydamine ring open impurity-d4 Stable Isotopes CS-O-54792 Not Available Enquire
N-Nitroso Bisoprolol-D5 Stable Isotopes CS-T-103100 2820170-76-9(Unlabelled) Enquire
N-Nitroso Bosutinib-d3 Stable Isotopes CS-O-59944 Not Available Enquire
N-Nitroso Bupropion-d9 Stable Isotopes CS-O-48596 2763780-10-3 (Unlabelled) In Stock
N-Nitroso Buspirone Impurity 1-d4 Stable Isotopes CS-O-57431 872826-80-7 (Unlabeled) In Stock
N-Nitroso Buspirone Impurity 1-d8 Stable Isotopes CS-O-57428 872826-80-7 (Unlabeled) Enquire
N-Nitroso Carvedilol-d5 Stable Isotopes CS-O-57898 Not Available In Stock
N-Nitroso Cetirizine EP Impurity A-d8 Stable Isotopes CS-O-47314 2005-04-1 (Unlabelled) In Stock
N-Nitroso Cilazapril (Ethyl-D5) Stable Isotopes CS-T-104113 1053740-92-3 (Unlabelled) Enquire
N-Nitroso Cilazapril (Phenyl-D5) Stable Isotopes CS-T-104114 1053740-92-3 (Unlabelled) Enquire
N-Nitroso Cinacalcet D3 Stable Isotopes CS-O-53620 Not Available Enquire
N-Nitroso Ciprofloxacin-d8 Stable Isotopes CS-O-49712 864443-44-7 (Unlabelled) In Stock
N-Nitroso Dabigatran Etexilate 13C6 Stable Isotopes CS-O-48746 Not Available Enquire
N-Nitroso Dabigatran Etexilate-d11 Stable Isotopes CS-T-104124 Not Available Enquire
N-Nitroso Dabigatran-d4 Etexilate Stable Isotopes CS-O-49448 Not Available Enquire
N-Nitroso Dalbavancin B0-D6 Stable Isotopes CS-O-58871 Not Available Enquire
N-Nitroso Degarelix-d7 Stable Isotopes CS-O-50571 Not Available Enquire
N-Nitroso Desloratadine-d4 Stable Isotopes CS-T-93987 2733579-31-0 In Stock
N-Nitroso Desmethyl Azithromycin-13Cd3 Stable Isotopes CS-O-53433 Not Available Enquire
N-Nitroso Desmethyl Cyclobenzaprine-d3 Stable Isotopes CS-O-57148 Not Available Enquire
N-Nitroso Desmethyl Levofloxacin-d8 Stable Isotopes CS-O-51506 Not Available In Stock
N-Nitroso Desmethyl Sumatriptan impurity D3 Stable Isotopes CS-O-53622 Not Available Enquire
N-nitroso desmethyl-Brompheniramine D3 Stable Isotopes CS-O-52831 Not Available Enquire
N-nitroso desmethyl-Brompheniramine D4 Stable Isotopes CS-O-52832 Not Available Enquire
N-nitroso desmethyl-Brompheniramine D4 (pyridine-D4) Stable Isotopes CS-O-52989 Not Available Enquire
N-Nitroso Desmethyldiphenhydramine-d3 Stable Isotopes CS-T-104122 Not Available In Stock
N-Nitroso Deucravacitinib Impurity 12 Stable Isotopes CS-O-54778 Not Available Enquire
N-Nitroso Deucravacitinib-d3 Stable Isotopes CS-O-60033 Not Available Enquire
N-Nitroso dibutylamine-d4 Stable Isotopes CS-O-57042 924-16-3 (Unlabeled) In Stock
N-Nitroso Diclofenac D4 Stable Isotopes CS-O-49510 66505-80-4 (Unlabelled) Enquire
N-Nitroso Dimethyl Anthranilate-d3 Stable Isotopes CS-O-46797 2562378-13-4 In Stock
N-Nitroso Dimethylamine-13C2 Stable Isotopes CS-O-45365 765259-01-6 (Unlabelled) Enquire
N-Nitroso Duloxetine D3 Stable Isotopes CS-EO-02522 Not Available Enquire
N-Nitroso Duloxetine D5 Stable Isotopes CS-EO-02521 Not Available Enquire
N-Nitroso Erdafitinib-D6 Stable Isotopes CS-T-104112 Not Available Enquire
N-Nitroso Ethylene Diamino Triacetic Acid-d4 (ethylene-d4) Stable Isotopes CS-O-55082 862542-34-5(Unlabelled) Enquire
N-Nitroso Ethylene Diamino Triacetic Acid-d4 sodium salt Stable Isotopes CS-O-55220 862542-34-5 (Unlabelled) Enquire
N-Nitroso Fentanyl EP Impurity D-d5 (Phenethyl-d5) Stable Isotopes CS-O-54052 1184873-14-0 (Unlabelled) In Stock
N-Nitroso Fentanyl EP Impurity D-d5 (Phenyl-d5) Stable Isotopes CS-O-53988 1184873-14-0 (Unlabelled) In Stock
N-Nitroso Fentanyl EP Impurity D-d5 (Piperidin-d5) Stable Isotopes CS-O-54059 1184873-14-0 (Unlabelled) Enquire
N-Nitroso Flecainide D4 Stable Isotopes CS-O-41317 - Enquire
N-Nitroso Fluoxetine-d5 Stable Isotopes CS-T-103081 150494-06-7(Unlabelled) In Stock
N-Nitroso Folic Acid-d4 Stable Isotopes CS-O-42067 26360-21-4 (Unlabeled) In Stock
N-Nitroso Guvacoline-d4 Stable Isotopes CS-T-83698 1330277-21-8 Enquire
N-Nitroso Hexahydropyridine-d10 Stable Isotopes CS-T-59646 960049-21-2 In Stock
N-Nitroso Inavolisib-d4 Stable Isotopes CS-O-54857 Not Available Enquire
N-Nitroso Labetalol D5 Stable Isotopes CS-O-41676 Not Available Enquire
N-Nitroso Levofloxacin Diamine D4 Stable Isotopes CS-O-53617 Not Available Enquire
N-Nitroso Lidocaine EP Impurity E D4 Stable Isotopes CS-O-48614 Not Available Enquire
N-Nitroso Lidocaine EP Impurity E-15N 13C2 Stable Isotopes CS-O-48703 Not Available Enquire
N-Nitroso Lisinopril D5 Stable Isotopes CS-O-48199 519175-80-5(Unlabeled) Enquire
N-Nitroso Lisinopril-d5 TFA Stable Isotopes CS-O-52090 Not Available In Stock
N-Nitroso L-Proline-d3 Stable Isotopes CS-O-11223 2140267-23-6 In Stock
N-nitroso Melatonin D3 Stable Isotopes CS-O-48198 278783-22-5 (Unlabelled) Enquire
N-Nitroso Melatonin D4 Stable Isotopes CS-O-48488 278783-22-5 (Unlabelled) Enquire
N-Nitroso Methylphenidate D5 Stable Isotopes CS-EO-04085 Not Available Enquire
N-Nitroso Methylphenylamine-13C,d3,15N (1mg/ml in Methanol) Stable Isotopes CS-O-38108 Not Available In Stock
N-Nitroso Metoprolol D6 Stable Isotopes CS-O-43271 138768-62-4 (Unlabelled) Enquire
N-Nitroso Metoprolol-d7 Stable Isotopes CS-O-43272 138768-62-4 (Unlabelled) In Stock
N-Nitroso Mirtazapine EP Impurity D D4 Stable Isotopes CS-O-53232 Not Available Enquire
N-Nitroso Morpholine-d8 (1000µg/ml) in Methanol Stable Isotopes CS-O-52234 1219805-76-1 In Stock
N-Nitroso N,C-Didesmethyl Doxylamine D5 Stable Isotopes CS-O-53430 Not Available Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(4R)-N-Nitroso Thiazolidine-4-carboxylic Acid ( Mix of isome... Impurities CS-T-83005 86594-16-3 In Stock
(R)-Methotrexate N-nitroso Impurity Impurities CS-O-46623 Not Available Enquire
(R)-N-Nitroso Anabasine, > 98% ee Impurities CS-T-83391 1795786-06-9 Enquire
(R)-N-Nitroso Anatabine Impurities CS-T-83490 1346617-09-1 Enquire
(R)-N-Nitrosonornicotine Impurities CS-T-37274 61601-78-3 Enquire
(R,S)-N-Nitroso Anabasine HCl salt Impurities CS-EO-03727 37620-20-5 (Freebase) Enquire
(R,S)-N-Nitroso Anatabine Impurities CS-T-37181 887407-16-1 In Stock
(S)-N-Nitroso Anabasine Impurities CS-T-37171 1133-64-8 Enquire
(S)-N-Nitroso Anatabine Impurities CS-T-37179 71267-22-6 Enquire
2-(N-nitroso,N-methylamino)-2-phenyl-n-butanoic acid methyl ... Impurities CS-O-44387 Not Available Enquire
2-(N-nitroso,N-methylamino)-2-phenyl-n-butanol Impurities CS-O-44388 Not Available Enquire
3-chloro-N-methyl-N-nitrosopropan-1-amine Impurities CS-O-42227 Not Available In Stock
4-Chloro-N-nitrosopiperidine Impurities CS-EO-02602 65445-61-6 Enquire
4-methoxy-N-(4-methoxyphenyl)-N-nitrosoaniline Impurities CS-O-53885 6947-36-0 In Stock
5-Amino-6-[(N-methyl-N-nitroso)amino]-7-methylquinoline Impurities CS-T-65681 1794810-51-7 Enquire
Desalkyl N-nitroso Linagliptin Impurities CS-O-42245 Not Available Enquire
Desbutyl N-nitroso Linagliptin impurity 16 Impurities CS-O-46605 Not Available Enquire
Desbutyl N-nitroso Linagliptin Impurity 52 Impurities CS-O-46607 Not Available Enquire
Desmethoxy N-Nitroso Esomeprazol impurity Impurities CS-O-46787 Not Available Enquire
glyphosate-N-nitroso-sodium Impurities CS-O-44103 56516-71-3 Enquire
midazolam N-Nitroso N-Oxide Nitromethylene Impurity Impurities CS-O-50048 Not Available Enquire
Mixture of N-nitroso Gentamicin Impurities CS-EO-03143 Not Available Enquire
N-(1-ethylpropyl)-N-nitroso-3,4-dimethylbenzeneamine(Mixture... Impurities CS-O-34815 Not Available In Stock
N-(2,6-dimethylphenyl)-N-nitrosoformamide Impurities CS-O-47126 92917-44-7 Enquire
N-(4,5-dichloro-2-nitrophenyl)-N-nitrosoacetamide Impurities CS-O-47235 15862-04-1 Enquire
N-Allyl-N-nitroso-3-butenylamine Impurities CS-ED-01143 54746-50-8 Enquire
N-Demethyl N-nitroso Lincomycin Impurities CS-O-43994 Not Available In Stock
N-desallyl N-Nitroso Cabergoline Impurities CS-O-46344 Not Available Enquire
N-Desethyl N-Nitroso Amiodarone Impurities CS-O-44811 678982-38-2 In Stock
N-Desethyl N-Nitroso Sunitinib impurity Impurities CS-O-44434 Not Available Enquire
N-desmethyl N-Nitroso 4-Chloro phenyl Zolpidem Impurities CS-O-45820 Not Available Enquire
N-Desmethyl N-Nitroso bosutinib Impurities CS-O-47094 Not Available Enquire
N-desmethyl N-Nitroso Cabergoline Impurities CS-O-46343 Not Available Enquire
N-Desmethyl N-Nitroso Clindamycin (mixture of isomers) Impurities CS-O-45706 Not Available In Stock
N-Desmethyl N-Nitroso Dexchlorpheniramine Impurities CS-O-46572 Not Available Enquire
N-desmethyl N-Nitroso Dofetilide Impurities CS-O-44211 Not Available In Stock
N-Desmethyl N-Nitroso Galantamine Impurities CS-O-45680 Not Available In Stock
N-Desmethyl N-Nitroso Methadone-D3 Impurities CS-O-45245 Not Available Enquire
N-desmethyl N-Nitroso Mianserine Impurities CS-O-45704 Not Available Enquire
N-Desmethyl N-Nitroso Olanzapine Impurities CS-O-39660 Not Available In Stock
N-Desmethyl N-Nitroso Olanzapine impurity 2 Impurities CS-O-44692 Not Available Enquire
N-Desmethyl N-Nitroso Rifampicin Impurities CS-O-45506 Not Available Enquire
N-desmethyl N-Nitroso Topotecan Impurities CS-O-45826 Not Available Enquire
N-Desmethyl N-Nitroso Trimebutine Impurities CS-O-44389 Not Available In Stock
N-Desmethyl N-NitrosoLoperamide Impurities CS-O-45871 Not Available Enquire
N-Desmethyl-N-Nitroso Venlafaxine EP Impurity F (Mixture of ... Impurities CS-O-41489 Not Available In Stock
N-Ethyl-N-nitroso-1-propanamine Impurities CS-T-22120 25413-61-0 In Stock
Nicardipine N-Desbenzyl N-Nitroso Impurity Impurities CS-O-42163 Not Available In Stock
N-methyl N-Nitroso Riociguat impurity Impurities CS-O-44875 Not Available Enquire
N-Methyl-N-Nitroso p-Toluidine Impurities CS-O-44189 937-24-6 In Stock
N-Methyl-N-nitroso-1-hexadecanamine Impurities CS-T-58459 98648-34-1 Enquire
N-Methyl-N-nitroso-1-octadecylamine Impurities CS-T-58460 69112-94-3 Enquire
N-Methyl-N-nitrosonornicotinium Iodide Impurities CS-T-58513 53844-48-7 Enquire
N-Methyl-N-nitrosourethane Impurities CS-T-34546 615-53-2 In Stock
N-Nitroso (S)-Piperidin-3-ol Impurities CS-O-46535 2380680-64-6 In Stock
N-Nitroso 1-Aminohydantoin Impurities CS-O-46179 Not Available Enquire
N-Nitroso 2-(2-chloroethylamino)ethanol Impurities CS-O-42670 Not Available Enquire
N-Nitroso 2-Deamino-2-hydroxyfolic acid Impurities CS-O-46534 Not Available In Stock
N-Nitroso 5-Chloro Hydrochlorothiazide Impurities CS-O-42816 Not Available Enquire
N-Nitroso 5-Chloropentanamide Apixaban Impurities CS-O-44917 Not Available Enquire
N-Nitroso 6-Desacetyl-6-bromo-N-Boc Palbociclib Impurities CS-O-42238 Not Available Enquire
N-Nitroso Abacavir EP Impurity A Impurities CS-EO-02606 Not Available Enquire
N-Nitroso Abiraterone Acetate Impurities CS-O-39499 Not Available Enquire
N-Nitroso Abiraterone Acetate Impurities CS-EO-02607 Not Available Enquire
N-Nitroso Acetone Semicarbazone Impurities CS-O-46530 Not Available Enquire
N-Nitroso Acetylcysteine Impurities CS-EO-02608 Not Available Enquire
N-Nitroso Aciclovir Impurities CS-EO-02609 Not Available Enquire
N-Nitroso Adenine Impurities CS-EO-02597 2615274-45-6 Enquire
N-nitroso Adenine d2 Impurities CS-O-45407 2615274-45-6 (Unlabelled) Enquire
N-Nitroso Akardite II Impurities CS-T-37170 1076199-26-2 Enquire
N-Nitroso Albendazole Impurities CS-EO-01213 Not Available Enquire
N-Nitroso Alfuzosin Impurities CS-O-46395 Not Available Enquire
N-Nitroso Almotriptan dimer 2 Impurities CS-O-46340 Not Available Enquire
N-Nitroso Alprazolam USP Related Compound A Impurities CS-EO-02610 Not Available Enquire
N-Nitroso Altizide Impurities CS-EO-01215 Not Available Enquire
N-Nitroso Amlodipine Impurity-1 Impurities CS-EO-02612 Not Available Enquire
N-Nitroso Amodiaquine Impurities CS-O-46396 Not Available Enquire
N-Nitroso Amoxicillin Impurities CS-O-43213 Not Available Enquire
N-Nitroso Amoxicillin Dimer Impurity -1 Impurities CS-EO-02620 Not Available Enquire
N-Nitroso Amoxicillin Dimer Impurity -2 Impurities CS-EO-02621 Not Available Enquire
N-Nitroso Amoxicillin EP Impurity C Impurities CS-EO-02614 Not Available Enquire
N-Nitroso Amoxicillin EP Impurity E Impurities CS-EO-02616 Not Available Enquire
N-Nitroso Amoxicillin Impurity Impurities CS-EO-02613 Not Available Enquire
N-Nitroso Amoxicillin Impurity J Dimer Impurities CS-EO-02617 Not Available Enquire
N-Nitroso Amoxicillin Impurity J Trimer Impurities CS-EO-02618 Not Available Enquire
N-Nitroso Amoxicillin Impurity K Impurities CS-EO-02619 Not Available Enquire
N-Nitroso Anagrelide Nitro impurity Impurities CS-O-46329 Not Available Enquire
N-Nitroso Anagrelide Related Compound A hydrochloride Impurities CS-O-46328 Not Available Enquire
N-nitroso Apalutamide impurity Impurities CS-O-43224 Not Available Enquire
N-Nitroso Aripiprazole Impurities CS-EO-02624 Not Available Enquire
N-Nitroso Articaine Impurities CS-O-45258 Not Available In Stock
N-Nitroso Aspartame Impurities CS-EO-02625 Not Available Enquire
N-Nitroso Axitinib Impurities CS-O-38952 Not Available Enquire
N-Nitroso Azathioprine Impurities CS-O-42264 Not Available In Stock
N-Nitroso Azilsartan Impurities CS-O-39458 Not Available Enquire
N-Nitroso Azilsartan Imidazole Carbonyl Dioxolene Ester Impurities CS-EO-02760 Not Available Enquire
N-Nitroso Azilsartan Methyl Ester Impurities CS-EO-02759 Not Available Enquire
N-nitroso azithromycin EP impurity M Impurities CS-O-43353 Not Available Enquire
N-Nitroso Benazepril Impurities CS-P-08855 Not Available In Stock
N-Nitroso Bendroflumethazide Impurity-1 Impurities CS-EO-01217 Not Available Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-Propanamine, N,2-dimethyl-N-nitroso- Intermediates CS-ED-40609 34419-76-6 Enquire
N-Methyl-N-nitroso Urea-d5 Intermediates CS-T-96037 2733722-92-2 Enquire
N-Nitroso Ziprasidone EP Impurity A D8 Intermediates CS-O-46241 Not Available Enquire
n-Nitroso-n-phenylacetamide Intermediates CS-ED-32316 938-81-8 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Valsartan 2-tetrazol impurity Building Blocks CS-O-33517 Not Available Enquire
N-nitroso-Ritalinic Acid-D9 Building Blocks CS-T-96008 Not Available Enquire