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

Guanidine Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(4-Cyclopropyl-6-methylpyrimidin-2-yl)-3-phenylguanidine-1... Stable Isotopes CS-T-102372 Not Available Enquire
1,1-Dimethyl-d6-2,3-bis(tert-butyloxycarbonyl)guanidine Stable Isotopes CS-T-101494 Not Available Enquire
4-Aminobutyl-d8 Guanidine Dihydrochloride Stable Isotopes CS-T-97044 Not Available Enquire
4-Aminobutyl-d8 Guanidine Tri-tert-butyl Ester Stable Isotopes CS-T-97043 Not Available Enquire
Guanidine-15N3 Hydrobromide Stable Isotopes CS-T-100256 Not Available Enquire
N,N'-Diphenylguanidine-d10 Stable Isotopes CS-T-100418 Not Available Enquire
Phenylguanidine Nitrate-d5 Stable Isotopes CS-T-99885 Not Available Enquire
Sulfaguanidine-D4 Stable Isotopes CS-T-94033 57-67-0 unlabelled Enquire
1-(4-Bromomethyl-2-thiazoyl)guanidine 13C3, Hydrobromide Sal... Stable Isotopes CS-T-49536 1329835-03-1 (Freebase) Enquire
1-(4-Chloromethyl-2-thiazoyl)guanidine-13C3 Hydrochloride Sa... Stable Isotopes CS-T-72348 1189443-23-9 Enquire
2,3-Dichlorobenzamidyl Guanidine 13C2 Stable Isotopes CS-T-52561 1185047-08-8 Enquire
Acetylguanidine 13C,15N3 Stable Isotopes CS-CX-00343 5699-40-1 Enquire
Guanidine-15N3 Hydrochloride Stable Isotopes CS-T-78021 121616-39-5 Enquire
N-Methylguanidine D3 Stable Isotopes CS-T-58812 1020719-65-6 Enquire
N-Methylguanidine-d3 Hydrochloride Stable Isotopes CS-T-58246 1246820-23-4 Enquire
Sulfaguanidine-13C6 Stable Isotopes CS-W-00513 57-67-0(Unlabelled) Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Sulfaguanidine API CS-O-11748 57-67-0 In Stock
Acetylsulfaguanidine API CS-O-36716 19077-97-5 Enquire
Aminoguanidine Nitrate API CS-T-02678 10308-82-4 Enquire
Guanidine acetate API CS-ED-00988 593-87-3 Enquire
Guanidine Phosphate API CS-O-16591 Not Available Enquire
Hydroxyguanidine API CS-T-78864 13115-21-4 Enquire
Sulfaguanidine monohydrate API CS-K-00257 6190-55-2 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1,1-Dimethyl-2,3-bis(tert-butyloxycarbonyl)guanidine Metabolite CS-T-91878 215170-99-3 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-(4-(CHLOROMETHYL)-4-HYDROXY-2-THIAZOLIN-2-YL)GUANIDINE HYD... Impurity CS-O-44556 95907-33-8 Enquire
2-(5-(chloromethyl)thiazol-2-yl)guanidine Impurity CS-O-44898 1378820-83-7 Enquire
Guanidine Hydrochloride Impurity CS-O-11663 50-01-1 In Stock
N-cyanophenyl guanidine Impurity CS-SN-00151 Not Available Enquire
1-(4-(chloromethyl)-4-hydroxy-4,5-dihydrothiazol-2-yl)guanid... Impurity CS-ED-02047 95907-34-9 Enquire
1-β-D-Ribofuranosyl-3-aminocarbonyl guanidine Impurity CS-O-13992 Not Available Enquire
1-β-D-Ribofuranosyl-3-iminohydroxymethyl guanidine Impurity CS-O-13993 Not Available Enquire
Adrenochrome Monoaminoguanidine Mesilate Impurity CS-T-01417 4009-68-1 Enquire
N-​Cyano-​N',​N''-​dimethylguanidine Impurity CS-T-89515 1609-06-9 Enquire
N-(4-Oxo-4,5-dihydro-1,3-thiazol-2-yl)guanidine Impurity CS-M-47521 41812-62-8 Enquire
N-[(6-Chloro-3-pyridinyl)methyl]-N-(2,2-diethoxyethyl)-N’-ni... Impurity CS-T-72267 155802-59-8 Enquire
N-[(6-Chloro-3-pyridinyl)methyl]-N’-(2,2-diethoxyethyl)-N’’-... Impurity CS-T-72070 330559-99-4 Enquire
N-1,3-Benzoxazol-2-ylguanidine Impurity CS-M-25435 39123-82-5 Enquire
N-1H-Benzimidazol-2-ylguanidine Impurity CS-M-47140 5418-95-1 Enquire
N-Formylguanidine Impurity CS-T-76958 4471-51-6 Enquire
N-Methylguanidine Hydrochloride Impurity CS-T-33922 21770-81-0 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(4-Chloromethyl-2-thiazoyl)guanidine Hydrochloride Salt Intermediate CS-T-50847 69014-12-6 In Stock
1,1,3,3-Tetramethylguanidine Intermediate CS-T-61937 80-70-6 In Stock
1,3-Diaminoguanidine hydrochloride Intermediate CS-MM-09830 36062-19-8 In Stock
1,3-Diphenylguanidine Intermediate CS-ED-26773 102-06-7 In Stock


Glucuronide

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N1-Beta-D-Galactopyranosylamino-guanidine Hydrochloride Glucuronide CS-N-00092 109853-84-1 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aminoguanidine (hydrochloride) Fine Chemicals CS-ZE-24901 1937-19-5 In Stock
Guanidine Nitrate Fine Chemicals CS-T-25727 506-93-4 In Stock
N-Cyano-N′-[4-(4-morpholinyl)phenyl]guanidine Fine Chemicals CS-O-54942 454646-55-0 Enquire
N-Nitroguanidine Fine Chemicals CS-M-42980 556-88-7 In Stock
Tricyclohexylguanidine Fine Chemicals CS-T-87166 4833-41-4 Enquire
1,2,3-Triisopropylguanidine Fine Chemicals CS-O-36903 121948-77-4 Enquire
1,3-Di-o-tolylguanidine Fine Chemicals CS-ZG-32340 97-39-2 Enquire
1-methyl-1-nitro-guanidine Fine Chemicals CS-ED-00281 62409-38-5 Enquire
2-(4-(CHLOROMETHYL)THIAZOL-2-YL)GUANIDINE Fine Chemicals CS-ZG-14990 81152-53-6 Enquire
2-[8-[8-(Diaminomethylideneamino)octylamino]octyl]guanidine Fine Chemicals CS-ZH-16997 13516-27-3 Enquire
2-phenyl-butyryl guanidine Fine Chemicals CS-O-33868 Not Available Enquire
Aminoguanidine sulfate monohydrate Fine Chemicals CS-MM-04064 996-19-0 Enquire
Ethylene Guanidine Fine Chemicals CS-T-22071 26893-38-9 Enquire
Guanidine carbonate Fine Chemicals CS-DB-00091 593-85-1 Enquire
N-(2-Hydroxyethyl)guanidine hydrochloride Fine Chemicals CS-MM-06324 63885-25-6 Enquire
Polyhexamethyleneguanidine Fine Chemicals CS-ZH-20573 57028-96-3 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
1-(4-morpholinophenyl)-2-nitrosoguanidine Nitrosamine CS-O-54265 --- Discontinued
1-cyano-1,2-dinitrosoguanidine Nitrosamine CS-O-57070 ---- Enquire
N-Cyano-N′-nitrosoguanidine Nitrosamine CS-O-57071 1132887-26-3 Enquire
N-Methyl-N-nitro-N′-nitrosoguanidine Nitrosamine CS-O-45793 26305-08-8 Enquire
N'-Nitro-N-nitroso-N-methylguanidine Nitrosamine CS-T-59384 70-25-7 In Stock
N-Nitroso Imatinib guanidine Intermediate Nitrosamine CS-O-46449 Not Available Discontinued
N-Nitroso-Cyanoguanidine Nitrosamine CS-O-41712 ---- Enquire
1,3-dinitrosoguanidine Nitrosamine CS-EO-01371 Not Available Enquire
Nitrosoguanidine Nitrosamine CS-ED-01250 674-81-7 Enquire
N-Nitro-N-nitroso-N-propylguanidine Nitrosamine CS-T-59385 13010-07-6 Enquire
N-Nitroso Sulfaguanidine Nitrosamine CS-O-39134 Not Available Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aminoguanidine hemisulfate 13C,15N2 Stable Isotope Reagent CS-O-47750 996-19-0 (Unlabelled) Enquire
Aminoguanidine-13C Bicarbonate Stable Isotope Reagent CS-T-103154 2706536-53-8 Enquire
Guanidineacetic-2,2-d2 Acid Stable Isotope Reagent CS-C-01093 1173020-63-7 Enquire
Guanidine-d5 Hydrochloride-d Stable Isotope Reagent CS-T-55461 108694-93-5 In Stock
N-Phenylguanidine-13C6 Stable Isotope Reagent CS-T-104035 2002-16-6(unlablled) Enquire
Aminoguanidine hemisulfate 13C,15N4 Stable Isotope Reagent CS-CX-00360 478189-68-3 (Freebase) Enquire
Cyanoguanidine-15N4 Stable Isotope Reagent CS-T-89218 63419-77-2 Enquire
Guanidine-13C,15N3 Hydrochloride Stable Isotope Reagent CS-T-78060 285977-73-3 Enquire


Biochemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Guanidine Hydrochloride (GHC) for molecular biology, 99.5% Biochemicals CS-SR-00082 50-01-1 Enquire
Guanidine Thiocyanate (GTC) for molecular biology, 99% Biochemicals CS-SR-00083 593-84-0 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Aminoguanidine Hydrochloride Building Blocks CS-CA-00431 16139-18-7 In Stock