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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Guanine, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Guanine 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 Guanine-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.

Guanine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"Guanine-4,5-13C2,7-15N" Stable Isotopes CS-T-78407 1207525-05-0 Enquire
[13C3, 15N]-6-Thioguanine Stable Isotopes CS-EK-01151 154-42-7 unlabeled Enquire
6-Ethyl Guanine D5 Stable Isotopes CS-T-54480 183558-84-1 Enquire
6-Methylthioguanine-[13C,d3] Stable Isotopes CS-I-00527 Not Available Enquire
6-Methylthioguanine-d3 Stable Isotopes CS-T-80056 1346601-96-4 Enquire
6-O-Methyl-d3-guanine Stable Isotopes CS-T-58247 50704-43-3 Enquire
6-Thioguanine 13C3 15N Stable Isotopes CS-CX-00600 154-42-7(Unlabeled) Enquire
7-(1-Methyl-2-hydroxyethyl)guanine-d7 Stable Isotopes CS-T-58266 1346603-33-5 (Unlabeled) Enquire
7-(1-Methyl-2-hydroxyethyl)guanine-d7 (Major) Stable Isotopes CS-T-82025 1346604-24-7 Enquire
7-[2-Hydroxy(propyl-d6)]guanine Stable Isotopes CS-T-56410 1346599-30-1 Enquire
7-Methylguanine-15N5 Stable Isotopes CS-T-82625 1352033-99-8 Enquire
8-Aminoguanine-13C2,15N Stable Isotopes CS-T-96678 Not Available Enquire
8-Nitroguanine-4,8-13C2-7-15N, technical grade-50% Purity Stable Isotopes CS-T-83314 1215708-85-2 Enquire
9-[[2-Benzyloxy-1-(benzyloxymethyl)-ethoxy]-methyl]-6-chloro... Stable Isotopes CS-T-48964 1184968-31-7 Enquire
9-[[2-Benzyloxy-1-(benzyloxymethyl)-ethoxy]methyl]guanine-d5 Stable Isotopes CS-T-48968 1185100-63-3 Enquire
9-Carboxymethoxymethylguanine-13C2,15N Stable Isotopes CS-T-96381 Not Available Enquire
9N-Trityl Guanine-13C2,15N Stable Isotopes CS-T-87817 1329799-77-0 Enquire
AFB-Guanine-13C,15N2 Stable Isotopes CS-T-98302 Not Available Enquire
Guanine 13C3,15N2 Stable Isotopes CS-EK-01639 73-40-5 unlabeled Enquire
Guanine-13C5,15N5 Stable Isotopes CS-T-78869 1207522-89-1 Enquire
Guanine-15N5 Stable Isotopes CS-T-79707 168566-53-8 Enquire
Guanine-4,8-13C2,7-15N Stable Isotopes CS-T-78542 1246814-70-9 Enquire
N2-Acetyl-O6-diphenylcarbamoylguanine-13C2,15N Stable Isotopes CS-T-100935 Not Available Enquire
N7-(2’,3’,4’-Trihydroxybutyl)guanine-d6 Stable Isotopes CS-T-102006 Not Available Enquire
N7-(2-Hydroxyethyl)guanine-d4 Stable Isotopes CS-T-78432 1246818-81-4 Enquire
N7-[(2-Hydroxyethoxy)methyl)guanine-d4 Stable Isotopes CS-T-79039 1794787-59-9 Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Guanine API Standards CS-O-08365 73-40-5 In Stock
Guanine hydrochloride API Standards CS-DA-00557 635-39-2 Enquire


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
6-Methylthioguanine Metabolites CS-O-03547 1198-47-6 In Stock
8-Flouro Guanine Metabolites CS-O-10018 28128-36-1 In Stock
9-(β-D-Ribofuranosyl)isoguanine Metabolites CS-N-00274 1818-71-9 Enquire
Nicotinamide guanine dinucleotide sodium salt Metabolites CS-N-00243 5624-35-1 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Methylguanine Impurities CS-T-33926 2958-98-7 Enquire
4-Hydroxy Estradiol 1-N7-Guanine Impurities CS-T-56028 178971-91-0 Enquire
6-Ethyl Guanine Impurities CS-T-76689 51866-19-4 Enquire
6-O-Methylguanine Impurities CS-T-33924 20535-83-5 In Stock
7-(1-Methyl-2-hydroxyethyl)guanine Impurities CS-T-34007 1346603-33-5 Enquire
7-Methylguanine Impurities CS-T-33923 578-76-7 Enquire
8-Oxo-Benzylguanine Impurities CS-T-38237 158754-46-2 Enquire
9-Carboxymethoxymethylguanine Impurities CS-T-70064 80685-22-9 Enquire
9-Methoxymethyl Guanine Impurities CS-T-32526 1202645-50-8 In Stock
9N-Trityl Guanine Impurities CS-T-45949 374678-33-8 Enquire
N1-(Pivaloyloxy)methyl-N2-(dimethylamino)methylene 9-Deazagu... Impurities CS-T-40215 151587-58-5 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3,4 ­anhydro­ arabinofuranosyl guanine Intermediates CS-O-16440 Not Available Enquire
4-[2'-(7''-Deazaguanine)ethyl]benzoic Acid N-Hydroxysuccinim... Intermediates CS-T-14531 204257-65-8 Enquire
4-Hydroxy Estrone 1-N7-Guanine Intermediates CS-T-56029 178971-92-1 Enquire
5-Aza-7-deazaguanine Intermediates CS-T-04438 67410-64-4 Enquire
7-(2-Chloroethyl)guanine Intermediates CS-T-11568 22247-87-6 Enquire
7-(2-Hydroxypropyl)guanine Intermediates CS-T-28515 56247-84-8 Enquire
8-Chloroguanine Intermediates CS-ED-40052 22052-03-5 Enquire
8-Nitroguanine Intermediates CS-T-59426 168701-80-2 Enquire
9-(2-Deoxy-2-fluoro-beta-D-arabinofuranosyl)guanine Intermediates CS-ED-25966 103884-98-6 Enquire
9-(5,5-Difluoro-5-phosphonopentyl)guanine Intermediates CS-ED-05388 130434-88-7 Enquire
9-[[2-Benzyloxy-1-(benzyloxymethyl)-ethoxy]-methyl]-6-chloro... Intermediates CS-T-05934 84222-47-9 Enquire
9-Deazaguanine Intermediates CS-T-14530 65996-58-9 Enquire
9-Ethylguanine Intermediates CS-T-77239 879-08-3 Enquire
9-Methylguanine Intermediates CS-O-57737 5502-78-3 Enquire
9-ß-D-arabinofuranosylguanine Intermediates CS-DL-00041 38819-10-2 Enquire
Isoguanine Intermediates CS-DE-00665 3373-53-3 Enquire
N2-Acetyl-O6-diphenylcarbamoylguanine Intermediates CS-T-64262 112233-74-6 Enquire
N2-Phenoxyacetyl Guanine Intermediates CS-T-39309 144782-23-0 Enquire
N7-(2,3,4-Trihydroxybutyl)guanine Intermediates CS-T-45449 93905-80-7 Enquire
N7-(2-Carbamoyl-2-hydroxyethyl)guanine Intermediates CS-T-50248 163734-06-3 Enquire
N7-(2-Hydroxyethyl)guanine Intermediates CS-T-56033 53498-52-5 In Stock
O-[4-(Aminomethyl)benzyl]guanine Intermediates CS-T-02948 674799-96-3 Enquire
O6-[4-(Trifluoroacetamidomethyl)benzyl]guanine Intermediates CS-T-45175 680622-70-2 Enquire
Thioguanine Intermediates CS-T-47883 154-42-7 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
7-Deazaguanine Fine Chemicals CS-T-73564 7355-55-7 Enquire
8-Aminoguanine Fine Chemicals CS-T-02687 28128-41-8 Enquire
N2-Acetylguanine Fine Chemicals CS-T-47267 19962-37-9 In Stock